Papers by Hao Chen

255 papers
Cognitive-Uncertainty Guided Knowledge Distillation for Accurate Classification of Student Misconceptions (2026.findings-acl)

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Challenge: Existing methods for identifying student misconceptions overlook students' reasoning processes, authors report .
Approach: They propose a knowledge distillation framework that mines high-value samples from existing data.
Outcome: The proposed framework outperforms sota LLM and standard fine-tuned 72B models on cross-topic tests.
WavLLM: Towards Robust and Adaptive Speech Large Language Model (2024.findings-emnlp)

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Challenge: Recent advances in large language models (LLMs) have expanded their scope to encompass multimodal functions.
Approach: They propose a robust and adaptive speech large language model with dual encoders . they validate the model on universal speech benchmarks and apply it to specialized speech-question-answer datasets based on a CoT approach .
Outcome: The proposed model achieves state-of-the-art performance across a range of speech tasks on the same model size.
Adaptive Spatial and Temporal Redundancy Optimization for Efficient Reasoning in Large Language Models (2026.acl-long)

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Challenge: Existing research to improve CoT efficiency falls into three categories, each with distinct limitations.
Approach: They propose a training-free framework that addresses both dimensions of CoT reasoning by applying a progressive precision reduction strategy coupled with an entropy-based confidence mechanism for adaptive termination.
Outcome: Empirical results show that the proposed framework achieves 11.3 efficiency gain without compromising accuracy.
TC–RAG: Turing–Complete RAG’s Case study on Medical LLM Systems (2025.acl-long)

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Challenge: Existing approaches to RAG neglect system state variables, resulting in poor performance and erroneous knowledge accumulation.
Approach: They propose a framework that incorporates a Turing Complete System to manage state variables and manage retrieval halting.
Outcome: The proposed framework improves on seven real-world healthcare datasets and shows that it is more accurate than existing methods.
UAQFact: Evaluating Factual Knowledge Utilization of LLMs on Unanswerable Questions (2025.findings-acl)

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Challenge: Existing datasets to assess LLMs' performance on unanswerable questions lack factual knowledge support.
Approach: They propose a bilingual unanswerable question dataset with auxiliary factual knowledge created from a Knowledge Graph and two new tasks to measure LLMs' ability to utilize internal and external factual information.
Outcome: The proposed datasets show that LLMs do not consistently perform well even when they have factual knowledge stored.
Event Ontology Completion with Hierarchical Structure Evolution Networks (2023.emnlp-main)

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Challenge: Existing methods for event detection require predefined schemas, but manual defining is expensive and labor-intensive.
Approach: They propose a task to achieve event clustering, hierarchy expansion and type naming . they propose 'neighbor Contrastive Clustering' module and a Hierarchy-Aware Linking module .
Outcome: The proposed method outperforms baseline methods on three datasets.
Reasoning Traces Shape Outputs but Models Won’t Say So (2026.acl-long)

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Challenge: Large reasoning models (LRMs) generate explicit reasoning traces before producing answers, offering a window into their decisionmaking.
Approach: They propose a method that injects synthetic reasoning snippets into a model’s reasoning trace and measures whether the model follows the injected reasoning and acknowledges doing so.
Outcome: The proposed method reveals that models refuse to disclose their influence when asked to explain their changed answers.
Rethinking Diverse Human Preference Learning through Principal Component Analysis (2025.findings-acl)

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Challenge: Decomposed Reward Models extract diverse human preferences from binary comparisons without fine-grained annotations.
Approach: They propose a decomposed reward model that extracts diverse human preferences from binary comparisons without fine-grained annotations.
Outcome: The proposed approach extracts diverse human preferences from binary comparisons without fine-grained annotations.
Your Language Model Can Secretly Write Like Humans: Contrastive Paraphrase Attacks on LLM-Generated Text Detectors (2025.emnlp-main)

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Challenge: Existing methods to detect large language models (LLMs) generated for plagiarism use paraphrases to rewrite them to evade detection.
Approach: They propose a training-free method that effectively fools text detectors using off-the-shelf LLMs by rewriting them to evade detection.
Outcome: The proposed method deceives text detectors using off-the-shelf LLMs by rewriting them to produce human-like sentences that are less discernible by detectors.
PDTrim: Targeted Pruning for Prefill-Decode Disaggregation in Inference (2026.acl-long)

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Challenge: Existing pruning methods ignore prefill-decode (PD) disaggregation in practice.
Approach: They propose a pruning method that is highly integrated with prefill-decode (PD) disaggregation, enabling more precise pruning of blocks.
Outcome: The proposed method achieves strong performance in both PD disaggregation and PD unified settings, and can be extended to other non-block pruning methods.
Contextualized Perturbation for Textual Adversarial Attack (2021.naacl-main)

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Challenge: Existing techniques for generating adversarial examples are driven by local heuristic rules that are agnostic to the context, resulting in unnatural and ungrammatical outputs.
Approach: They propose a ContextuaLized AdversaRial Example generation model that generates fluent and grammatical outputs through a mask-then-infill procedure.
Outcome: The proposed model outperforms baseline models in terms of attack success rate, textual similarity, fluency and grammaticality.
DynamicFocalPO: Adaptive Focusing Strategy for Preference Optimization (2026.findings-acl)

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Challenge: Recent preference optimization algorithms such as Direct Preference Optimization (DPO) have become prevalent for aligning large language models with human preferences.
Approach: They propose a preference optimization algorithm that introduces a modulating factor that down-weighs misranked preference pairs and employs focusing strategy that adapts over the course of training.
Outcome: Experiments show that DynamicFocalPO surpasses both DPO and FocalPO on benchmarks including Alpaca Eval 2.0 and Arena-Hard using Mistral-Base-7B and Llama-3-Instruct-8B.
OpenWebAgent: An Open Toolkit to Enable Web Agents on Large Language Models (2024.acl-demos)

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Challenge: OpenWebAgent integrates large language models and large multimodal models to improve web automation.
Approach: They propose to integrate large language models and large multimodal models into an open toolkit to optimize web automation.
Outcome: The open toolkit integrates both large language models (LLMs) and large multimodal models (LMMs) it enables the development of powerful, task-oriented web agents, significantly enhancing user experience and operational efficiency on the web.
Look Light, Think Heavy: What Multimodal Chain-of-Thought Reasoning Can and Cannot Do (2026.acl-long)

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Challenge: Existing open-source models often yield only marginal overall improvements, possibly due to an overemphasis on mathematical reasoning at the expense of broader capabilities.
Approach: They evaluate 12 multimodal tasks using 14 non-reasoning models and 8 reasoning models.
Outcome: The proposed method is effective in multimodal reasoning tasks, the authors show . they show that it lacks the ability to maintain deep visual introspection throughout the reasoning process.
MemoPhishAgent: Memory-Augmented Multi-Modal LLM Agent for Phishing URL Detection (2026.acl-industry)

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Challenge: Traditional phishing website detection relies on static heuristics or reference lists, which lag behind rapidly evolving attacks.
Approach: They propose a memory-augmented multi-modal LLM agent that leverages episodic memories to guide decisions on recurring and novel threats.
Outcome: The proposed agent outperforms state-of-the-art phishing detection tools on two public datasets and improves recall by 20%.
Guided Knowledge Generation with Language Models for Commonsense Reasoning (2024.findings-emnlp)

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Challenge: Large Language Models (LLMs) have achieved notable success in commonsense reasoning tasks, benefiting from extensive world knowledge acquired through extensive pretraining.
Approach: They propose a method to generate knowledge explanations and to automatically assign labels based on the probability of correct answers.
Outcome: The proposed method outperforms baselines on four widely-used commonsense reasoning benchmarks and shows that it can generate high quality knowledge leading to correct answers.
Task-Oriented Dialogue as Dataflow Synthesis (2020.tacl-1)

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Challenge: Existing approaches to task-oriented dialogue represent dialogue state as a dataflow graph . microsoft's SMCalFlow dataset features complex dialogues about events, weather, places, and people .
Approach: They propose a dataflow graph-based dialogue agent that maps each user utterance to a program that extends this graph.
Outcome: The proposed framework improves representability and predictability in natural dialogues . it uses dataflow graphs and metacomputation to map user intents to a program .
Token Prediction as Implicit Classification to Identify LLM-Generated Text (2023.emnlp-main)

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Challenge: a novel approach for identifying large language models (LLMs) involved in text generation is proposed . instead of adding an additional classification layer, we reframe the classification task as a next-token prediction task .
Approach: They propose a novel approach for identifying large language models involved in text generation . instead of adding an additional classification layer, they reframe the task as a next-token prediction task .
Outcome: The proposed method performs exceptionally well in the text classification task . it can distinguish distinctive writing styles among various LLMs even without an explicit classifier.
Code Representation Pre-training with Complements from Program Executions (2024.emnlp-industry)

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Challenge: Existing languages have syntactic representations of code to improve code intelligence, but they are difficult to learn from code.
Approach: They propose to embed dynamic information of programs revealed by their test cases into feature representations of code as complements.
Outcome: The proposed method yields 6%/19% mAP improvements over its masked language modeling counterparts.
PhotoChat: A Human-Human Dialogue Dataset With Photo Sharing Behavior For Joint Image-Text Modeling (2021.acl-long)

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Challenge: PhotoChat contains 12k dialogues, each of which is paired with a user photo that is shared during the conversation.
Approach: They propose to use PhotoChat to facilitate research on image-text modeling by combining a photo-sharing intent prediction task and a picture retrieval task to retrieve the most relevant photo according to the dialogue context.
Outcome: The proposed tasks achieve 10.4% recall@1 and 58.1% F1 scores, indicating that the proposed dataset presents interesting yet challenging real-world problems.
Hierarchical Topic Modeling via Contrastive Learning and Hyperbolic Embedding (2024.lrec-main)

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Challenge: Existing hierarchical topic models are based on Euclidean space, which cannot retain the hierarchically semantic information in the corpus, leading to irrational structure of the generated topics.
Approach: They propose a novel hierarchical topic model that uses contrastive learning to capture information from documents.
Outcome: The proposed model performs on topic coherence and topic diversity, and on the rationality of the topic hierarchy.
LM-Infinite: Zero-Shot Extreme Length Generalization for Large Language Models (2024.naacl-long)

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Challenge: Currently, large language models (LLMs) train on short text segments due to the computational overhead quadratic in the input lengths of their Transformer architectures.
Approach: They propose a method that allows LLMs pre-trained with 2K or 4K-long segments to generalize to up to 200M length inputs while retaining perplexity.
Outcome: The proposed method achieves 2.7 decoding speed up and 7.5 memory saving over the original model.
Diffusion Theory as a Scalpel: Detecting and Purifying Poisonous Dimensions in Pre-trained Language Models Caused by Backdoor or Bias (2023.findings-acl)

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Challenge: Existing methods to fine-tune pre-trained language models (PLMs) are not safe, since the fine-uning process is invisible to the user.
Approach: They propose a technique to study the dynamic process of fine-tuning for finding poisonous dimensions using diffusion theory.
Outcome: The proposed approach can detect poisonous dimensions with abnormal dynamics, purify them and fine-tune them on a clean dataset.
COM-MRC: A COntext-Masked Machine Reading Comprehension Framework for Aspect Sentiment Triplet Extraction (2022.emnlp-main)

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Challenge: Aspect Sentiment Triplet Extraction (ASTE) aims to extract sentiment triplets from sentences, but when faced with multiple aspect terms, the MRC-based methods could fail due to the interference from other aspect terms.
Approach: They propose a COntext-Masked MRC framework for Aspect Sentiment Triplet Extraction (ASTE) which aims to extract sentiment triplets from sentences .
Outcome: The proposed framework outperforms state-of-the-art methods on benchmark datasets and shows that it can extract sentiment triplets from multiple aspect terms.
Multimodal Large Language Models for Text-rich Image Understanding: A Comprehensive Review (2025.findings-acl)

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Challenge: Recent advances in vision-language models have unified perception and understanding tasks within Visual Question Answering paradigms.
Approach: They propose to outline timeline, architecture, and pipeline of nearly all TIU MLLMs and review their performance on mainstream benchmarks.
Outcome: The proposed models perform well on mainstream benchmarks and are compared with other models.
Progressive Re-ranking for Multimodal Retrieval-Augmented Generation via Curriculum Learning (2026.findings-acl)

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Challenge: Existing approaches to improve retrieval performance of large language models are limited by static knowledge.
Approach: They propose a multimodal re-ranking framework that combines curriculum learning with fine-grained reranking and multimodal section reassessment to improve CLIP-based visual coarse-grain retrieval.
Outcome: The proposed framework achieves state-of-the-art answer accuracy and competitive retrieval performance on InfoSeek and Enc-VQA.
Track-SQL: Enhancing Generative Language Models with Dual-Extractive Modules for Schema and Context Tracking in Multi-turn Text-to-SQL (2025.naacl-long)

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Challenge: Existing approaches to generative language models struggle to handle the increasing complexity of multi-turn Text-to-SQL tasks.
Approach: They propose a framework which enhances generative language models with dual-extractive modules designed to track schema and contextual changes in multi-turn Text-to-SQL.
Outcome: The proposed framework achieves state-of-the-art performance on SparC and CoSQL datasets and significantly improves execution accuracy in multi-turn interactions by 7.1% and 9.55%.
Knowledge-augmented Financial Market Analysis and Report Generation (2024.emnlp-industry)

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Challenge: Existing methods to generate financial market analysis text require extensive financial knowledge and skill of financial analysts.
Approach: They propose a task to generate financial market analysis reports using financial market data using a financial knowledge graph.
Outcome: The proposed framework outperforms large-scale language models and retrieval-augmented baselines in the financial market analysis generation task.
MAVEN-ARG: Completing the Puzzle of All-in-One Event Understanding Dataset with Event Argument Annotation (2024.acl-long)

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Challenge: Existing datasets for event understanding have limited coverage due to complexity of tasks.
Approach: They propose a dataset that augments MAVEN datasets with event argument annotations . they propose 98,591 events and 290,613 arguments obtained with laborious human annotation .
Outcome: The proposed dataset is the first all-in-one dataset supporting event detection, event argument extraction, and event relation extraction.
Generative Annotation for ASR Named Entity Correction (2025.emnlp-main)

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Challenge: Existing named entity correction models fail to transcribe domain-speciffcnamed entities when theforms of the wrongly-transcribed words and the ground-truth entity are signiffcantly different.
Approach: They propose a method that utilizes speech sound features to retrieve candidate entities . it uses speech sound feature to annotate entityerrors in ASR transcripts .
Outcome: The proposed method can bring signiffcant improvement to entity accuracy.
USSA: A Unified Table Filling Scheme for Structured Sentiment Analysis (2023.acl-long)

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Challenge: Structured Sentiment Analysis (SSA) is a problem of bi-lexical dependency parsing . previous studies have cast it as a bottleneck because of overlap and discontinuity issues .
Approach: They propose a bi-lexical dependency parsing graph and a table-filling scheme that addresses overlap and discontinuity issues.
Outcome: The proposed framework outperforms state-of-the-art methods on benchmark datasets.
SPARD: Self-Paced Curriculum for RL Alignment via Integrating Reward Dynamics and Data Utility (2026.acl-long)

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Challenge: Large Language Models (LLMs) are shifting the focus from single verifiable tasks toward complex, open-ended real-world scenarios.
Approach: They propose a framework that automatically adjusts reward weights and data importance to synchronize learning intent with data utility for optimal performance.
Outcome: The proposed framework improves model capabilities across all domains and scales.
DeepPresenter: Environment-Grounded Reflection for Agentic Presentation Generation (2026.findings-acl)

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Challenge: Existing presentation agents rely on predefined workflows and fixed templates to generate presentations.
Approach: They propose an agentic framework that adapts to diverse user intents and iterative refinement based on observation.
Outcome: The proposed framework can be used to generate presentations with environmental observations.
ReCreate: Reasoning and Creating Domain Agents Driven by Experience (2026.acl-long)

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Challenge: Large Language Model (LLM) agents are reshaping the industrial landscape, but tasks differ widely, making them labor-intensive to build.
Approach: They propose an experience-driven framework for the automatic creation of domain agents . they leverage agent interaction histories to provide rich concrete signals on success or failure .
Outcome: The proposed framework outperforms human-designed agents and existing methods in experiments across diverse domains.
Modeling Multi-Dimensional Cognitive States in Large Language Models under Cognitive Crowding (2026.findings-acl)

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Challenge: Existing Large Language Models (LLMs) mainly address isolated tasks such as emotion analysis or stance detection.
Approach: They propose a large-scale model that combines large-level annotations with hyperbolic space to model human cognitive states.
Outcome: The proposed model outperforms baseline models on cognitive dimensions on single dimension tasks while retaining strong hierarchical structure.
An Evaluation Resource for Grounding Translation Errors (2025.findings-emnlp)

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Challenge: Current fine-grained error analyses do not ground the errors to the reasons why the annotated text spans are erroneous.
Approach: They use a bi-directional grounding scheme to ground erroneous text in two directions . if the error spans of both directions are consistent, the explanation is valid .
Outcome: The proposed grounding process improves translation error detection significantly.
ALCAP: Alignment-Augmented Music Captioner (2023.emnlp-main)

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Challenge: Traditional approaches to music captioning ignore the intricate interplay between the two . however, a comprehensive understanding of music necessitates the integration of both these elements.
Approach: They propose a method to learn multimodal alignment between audio and lyrics through contrastive learning.
Outcome: The proposed method achieves new state-of-the-art on two music captioning datasets.
The Microsoft Toolkit of Multi-Task Deep Neural Networks for Natural Language Understanding (2020.acl-demos)

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Challenge: MT-DNN is an open-source natural language understanding toolkit . it allows researchers and developers to train customized deep learning models .
Approach: They present MT-DNN, an open-source natural language understanding toolkit . it is designed to facilitate rapid customization for a broad spectrum of NLU tasks . MT supports multi-task knowledge distillation, which can substantially compress a deep neural model without significant performance drop.
Outcome: The proposed model can significantly compress a large model without significant performance drop.
Language Models can be Deductive Solvers (2024.findings-naacl)

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Challenge: Recent advances have enabled Large Language Models (LLMs) to potentially exhibit reasoning capabilities, but complex logical reasoning remains a challenge.
Approach: They propose a novel language model that internalizes and emulates the reasoning processes of logical solvers and avoids parsing errors by learning strict adherence to solver syntax and grammar.
Outcome: The proposed model outperforms state-of-the-art solver-augmented language models and few-shot prompting methods on public deductive reasoning benchmarks.
Analyzing Chain-of-thought Prompting in Black-Box Large Language Models via Estimated V-information (2024.lrec-main)

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Challenge: Chain-of-Thought (CoT) prompting and large language models (LLMs) have shown great potential in improving performance on challenging reasoning tasks.
Approach: They propose a new metric which extends the concept of pointwise V-information to black-box models and quantifies label-relevant new information introduced by CoT prompting.
Outcome: The proposed metric extends the concept of pointwise V-information to black-box models, quantifying label-relevant new information introduced by CoT prompting beyond pre-existing label information.
MathMixup: Boosting LLM Mathematical Reasoning with Difficulty-Controllable Data Synthesis and Curriculum Learning (2026.findings-acl)

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Challenge: Existing data synthesis methods suffer from limited diversity and lack precise control over problem difficulty, making them insufficient for efficient training paradigms such as curriculum learning.
Approach: They propose a data synthesis paradigm that generates high-quality, difficulty-controllable mathematical reasoning problems through hybrid and decomposed strategies.
Outcome: The proposed paradigm outperforms existing methods and improves mathematical reasoning abilities.
PreCo: A Large-scale Dataset in Preschool Vocabulary for Coreference Resolution (D18-1)

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Challenge: Existing methods for coreference resolution are based on word2vec-like representations of entities.
Approach: They propose a large-scale English dataset for coreference resolution . they use 38K documents and 12.5M words from English-speaking preschoolers .
Outcome: The proposed dataset is more efficient with higher training-test overlap than OntoNotes . the study also shows that mention detection and clustering are more efficient on PreCo .
Bilingual Dictionary Based Neural Machine Translation without Using Parallel Sentences (2020.acl-main)

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Challenge: a monolingual speaker can learn to translate by looking up a bilingual dictionary . a novel task of machine translation (MT) is based on no parallel sentences but can refer to a ground-truth bilingual dictionary and large-scale monolingual corpora.
Approach: They propose a task of machine translation that uses a bilingual dictionary and large-scale monolingual corpora to translate a monolingual speaker.
Outcome: The proposed task is based on a bilingual dictionary and large scale monolingual corpora, while being independent on parallel sentences.
Dual Graph Convolutional Networks for Aspect-based Sentiment Analysis (2021.acl-long)

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Challenge: Existing methods to model relationships between aspects and opinion words are inefficient due to informal expressions and complexity of online reviews.
Approach: They propose a dual graph convolutional networks model that considers complementarity of syntax structures and semantic correlations simultaneously.
Outcome: The proposed model outperforms state-of-the-art methods on three public datasets and validates it.
PairCoder: Pair Programming-Inspired Two-Agent Collaboration for Code Generation (2026.findings-acl)

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Challenge: Existing multi agent frameworks for large language models are brittle on code generation tasks.
Approach: They propose a framework that brings pair programming to autonomous LLM collaboration.
Outcome: Using PairCoder, large language models achieve better results on code generation tasks and reduce token usage by 40% to 70% on eight representative backbones.
On Tree-Based Neural Sentence Modeling (D18-1)

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Challenge: Existing tree-based sentence modeling approaches adopt syntactic parsing trees as the explicit structure prior.
Approach: They replace parsing trees with trivial trees to study their effectiveness . they found that tree-based sentence modeling gives better results when crucial words are closer to the final representation .
Outcome: The proposed tree-based sentences have shown better results on many downstream tasks.
A Data-Efficient Path to Multilingual LLMs: Language Expansion via Post-training PARAM𝛥 Integration into Upcycled MoE (2026.acl-long)

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Challenge: Large Language Models (LLMs) are expensive and require extensive Continued Pre-Training and data-intensive alignment to expand.
Approach: They propose a method which upcycles a dense model into a Mixture-of-Experts architecture, allocating different experts to different languages.
Outcome: Experiments show that the proposed model upcycles a dense model into a Mixture-of-Experts(MoE) architecture, allocating different experts to different languages.
Enhancing Speech Large Language Models with Prompt-Aware Mixture of Audio Encoders (2025.emnlp-main)

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Challenge: Existing work on integrating audio encoders with large language models (LLMs) has focused on semantic understanding tasks, but different tasks may require distinct features that emphasize either semantic or acoustic aspects.
Approach: They propose to use a prompt-aware mixture to enhance the Speech LLM that uses multiple audio encoders to extract different features based on the prompt.
Outcome: The proposed approach outperforms all single-encoder Speech LLMs on ASR, speaker number verification, and AC tasks.
DecoupleSearch: Decouple Planning and Search via Hierarchical Reward Modeling (2025.emnlp-main)

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Challenge: Retrieval-Augmented Generation (RAG) systems have emerged as a pivotal methodology for enhancing Large Language Models (LLMs).
Approach: They propose a framework that decouples planning and search processes using dual value models, enabling independent optimization of plan reasoning and search grounding.
Outcome: The proposed framework decouples planning and search processes using dual value models, enabling independent optimization of plan reasoning and search grounding.
Novel Relation Detection: Discovering Unknown Relation Types via Multi-Strategy Self-Supervised Learning (2023.findings-emnlp)

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Challenge: Existing approaches to relation extraction can only recognize predefined relation types . new or out-of-scope relation types may continually emerge after the model is deployed .
Approach: They propose a novel relation detection task that uses self-supervised learning to handle shallow semantic similarity problem.
Outcome: The proposed method outperforms state-of-the-art methods on two datasets.
Xiaomingbot: A Multilingual Robot News Reporter (2020.acl-demos)

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Challenge: Xiaomingbot is a multilingual and multimodal software robot with four capabilities: news generation, news translation, news reading and avatar animation.
Approach: They propose to build a multilingual and multimodal software robot with four inte- gal capabilities: news generation, news translation, news reading and avatar animation.
Outcome: The proposed system generates Chinese news, then reads it in multiple languages and generates an animated avatar reading it.
Towards a Mechanistic Understanding of Large Reasoning Models: A Survey of Training, Inference, and Failures (2026.acl-long)

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Challenge: Recent research has shown that reinforcement learning can elicit intriguing emergent reasoning behaviors.
Approach: They propose a comprehensive survey of the mechanistic understanding of large reasoning models . they organize findings into three core dimensions: 1) training dynamics, 2) reasoning mechanisms, and 3) unintended behaviors.
Outcome: This paper synthesizes the mechanistic understanding of large reasoning models into three dimensions . authors outline a roadmap for future studies including improved interpretability and methodologies .
Generating Sentences from Disentangled Syntactic and Semantic Spaces (P19-1)

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Challenge: Variational auto-encoders (VAEs) are widely used in natural language generation due to the regularization of the latent space.
Approach: They propose to generate sentences from disentangled syntactic and semantic spaces by using the linearized tree sequence.
Outcome: The proposed method achieves similar or better performance in various tasks compared with state-of-the-art models.
E-KAR: A Benchmark for Rationalizing Natural Language Analogical Reasoning (2022.findings-acl)

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Challenge: Existing benchmarks to test word analogy do not reveal the underneath process of analogical reasoning of neural models.
Approach: They propose an explanation benchmark for analogical reasoning using a Civil Service exam . they use a free-text explanation scheme to explain whether an analogy should be drawn .
Outcome: The proposed benchmark is very challenging for state-of-the-art models, it is found.
CR-LLM: A Dataset and Optimization for Concept Reasoning of Large Language Models (2024.findings-acl)

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Challenge: Existing concept reasoning related datasets suffer from modeledge leakage and context leakage.
Approach: They propose a concept reasoning for large language models with modeledge leakage prevention and context leakage preventive methods to improve the models' conceptual reasoning abilities.
Outcome: The proposed method significantly improves the existing models and reasoning methods, achieving a 7% increase in accuracy compared to CoT and showing better granularity.
CACA: Context-Aware Cross-Attention Network for Extractive Aspect Sentiment Quad Prediction (2025.coling-main)

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Challenge: Existing generative ASQP approaches do not model the contextual relationship of the review sentence to predict implicit terms.
Approach: They propose an extractive ASQP framework, CACA, which features with Context-Aware Cross-Attention Network to enhance alignment of aspects and opinions.
Outcome: The proposed framework improves the alignment of aspects and opinions, whether explicit or implicit, and improves on three benchmark datasets.
Retrievals Can Be Detrimental: Unveiling the Backdoor Vulnerability of Retrieval-Augmented Diffusion Models (2026.acl-long)

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Challenge: Retrieval-augmented diffusion models (RDMs) have been developed to enhance performance with reduced parameters.
Approach: They propose to integrate retrieval-augmented diffusion models with Retrieval-augmented generation (RAG) that enhances performance with reduced parameters.
Outcome: The proposed framework achieves outstanding attack effects while maintaining benign utility.
FuzzAug: Data Augmentation by Coverage-guided Fuzzing for Neural Test Generation (2025.findings-emnlp)

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Challenge: Using large language models to generate meaningful tests is expensive and time-consuming .
Approach: They propose a data augmentation technique that incorporates valid testing semantics and diverse coverage-guided inputs into large language models.
Outcome: The proposed technique improves performance over the baselines by incorporating valid testing semantics and providing diverse coverage-guided inputs.
Large Language Models Can Solve Real-World Planning Rigorously with Formal Verification Tools (2025.naacl-long)

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Challenge: Large Language Models (LLMs) struggle to generate correct plans for multi-constraint planning problems . a recent study showed that large language models have significant potential in solving planning problems.
Approach: They propose an LLM-based planning framework that formalizes and solves multi-constraint planning problems as constrained satisfiability problems.
Outcome: The proposed framework achieves a success rate of 93.9% and is effective with diverse paraphrased prompts.
EARL: Informative Knowledge-Grounded Conversation Generation with Entity-Agnostic Representation Learning (2021.emnlp-main)

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Challenge: Existing knowledge-grounded conversation models lack knowledge that occurs in training data, resulting in incomplete knowledge generation.
Approach: They propose an Entity-Agnostic Representation Learning method to introduce knowledge graphs to informative conversation generation using context of conversations and relational structure of knowledge graph.
Outcome: The proposed model generates more informative, coherent, and natural responses than baseline models.
DIDS: Domain Impact-aware Data Sampling for Large Language Model Training (2025.emnlp-main)

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Challenge: Existing approaches for optimizing domain-level sampling strategies struggle with maintaining intra-domain consistency and accurately measuring domain impact.
Approach: They propose to use a Fisher-Information Matrix-guided metric to measure domain impact to ensure intra-domain consistency and accuracy.
Outcome: The proposed model achieves 3.4% higher average performance while maintaining comparable training efficiency.
To Copy Rather Than Memorize: A Vertical Learning Paradigm for Knowledge Graph Completion (2023.acl-long)

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Challenge: Existing methods for embedding knowledge graphs implicitly memorize relation rules to infer missing links, but they are difficult to memorize due to the inherent deficiencies of such implicit memorization strategy.
Approach: They propose a vertical learning paradigm that allows to explicitly copy target information from related factual triples for more accurate prediction.
Outcome: The proposed model improves generalization ability and makes distant link prediction significantly easier.
SERE: Structural Example Retrieval for Enhancing LLMs in Event Causality Identification (2026.findings-acl)

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Challenge: Large Language Models (LLMs) have demonstrated strong performance across various NLP tasks, but their effectiveness in ECI remains limited due to biases in causal reasoning.
Approach: They propose a structural example retrieval framework that leverages LLMs’ few-shot learning capabilities to help LLM models in ECI.
Outcome: The proposed framework leverages LLMs’ few-shot learning capabilities to guide LLM models in causal reasoning, mitigating bias and improving accuracy.
Derailer-Rerailer: Adaptive Verification for Efficient and Reliable Language Model Reasoning (2025.findings-acl)

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Challenge: Existing prompting methods struggle with complex tasks and reasoning stability, limiting their practical deployment.
Approach: They propose a framework that adaptively balances reasoning accuracy and computational efficiency by employing a lightweight Derailer mechanism to assess reasoning stability and selectively triggers an advanced Rerailer verification process only when necessary.
Outcome: The proposed framework achieves significant accuracy improvements (8-11%) while maintaining 2-3 times better efficiency than existing verification methods.
Reliable Use of Lemmas via Eligibility Reasoning and Section-Aware Reinforcement Learning (2026.acl-short)

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Challenge: Recent large language models (LLMs) perform strongly on mathematical benchmarks but often import conclusions without validating assumptions.
Approach: They propose a model that encodes a lemma specification and trains with reinforcement learning and section-aware loss masking to assign penalty to the section responsible for errors.
Outcome: The proposed model performs well on benchmarks but often misapplyes lemmas . the model is able to encode the specification and train with reinforcement learning .
A Large Scale Speech Sentiment Corpus (2020.lrec-1)

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Challenge: Existing corpus for sentiment analysis uses text inputs, but voice inputs are becoming more important as smart assistants and mobile voice control become more prevalent.
Approach: They propose to extend the Switchboard-1 Telephone Speech Corpus by adding sentiment labels from 3 different human annotators for every transcript segment.
Outcome: The proposed corpus contains 49500 labeled speech segments covering 140 hours of audio.
Understanding and Mitigating Bias Inheritance in LLM-based Data Augmentation on Downstream Tasks (2026.acl-long)

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Challenge: Generating synthetic datasets via large language models (LLMs) has emerged as promising approach to improve LLM performance.
Approach: They propose three mitigation strategies to mitigate bias inheritance in LLMs by analyzing real and LLM-augmented data.
Outcome: The proposed methods can work differently on different tasks and biases.
MTG: A Benchmark Suite for Multilingual Text Generation (2022.findings-naacl)

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Challenge: Using MTG, we train and evaluate multilingual text generation models using human-annotated data.
Approach: They propose a multilingual multiway text generation dataset with 400k human-annotated data that includes four generation tasks across five languages.
Outcome: The proposed dataset includes four generation tasks across five languages (English, German, French, Spanish and Chinese) it provides comprehensive evaluations with diverse generation scenarios.
Text-Attributed Graph Learning with Coupled Augmentations (2025.coling-main)

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Challenge: Existing models focus on either the text attribute or the graph structure, neglecting the other aspect.
Approach: They propose a model that combines the strengths of both text-learning and graph-learning models in parallel.
Outcome: The proposed model outperforms existing models on diverse datasets.
Contrastive Aligned Joint Learning for Multilingual Summarization (2021.findings-acl)

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Challenge: Existing summarization systems for multilingual text summarizing are limited due to the lack of large-scale data in multiple languages.
Approach: They propose a multilingual summarization system that can understand documents in multiple languages and generate summaries in the corresponding language.
Outcome: The proposed model improves over monolingual models in all languages and transferable to other languages.
AgentThink: A Unified Framework for Tool-Augmented Chain-of-Thought Reasoning in Vision-Language Models for Autonomous Driving (2025.findings-emnlp)

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Challenge: Vision-Language Models struggle with hallucinations, inefficient reasoning, and limited real-world validation hinders accurate perception and robust step-by-step reasoning.
Approach: AgentThink integrates Chain-of-Thought reasoning with dynamic, agent-style tool invocation for autonomous driving tasks.
Outcome: Experiments on the DriveLMM-o1 benchmark show AgentThink significantly boosts overall reasoning scores by 53.91% and enhances answer accuracy by 33.54% .
DyLex: Incorporating Dynamic Lexicons into BERT for Sequence Labeling (2021.emnlp-main)

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Challenge: Existing approaches to integrate lexical knowledge into deep learning models are limited by large-scale dynamic lexicons.
Approach: They propose a plug-in lexicon incorporation approach for BERT based sequence labeling tasks . they adopt word-agnostic tag embeddings to avoid re-training the representation .
Outcome: The proposed framework achieves new SOTA even with large scale lexicons, the authors show . they adopt word-agnostic tag embeddings to avoid re-training the representation .
Semantic Framework based Query Generation for Temporal Question Answering over Knowledge Graphs (2022.emnlp-main)

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Challenge: Existing methods for temporal question answering ignore intrinsic connections between events that can make them temporally related.
Approach: They propose a temporal question answering method that generates query graphs by exploring relevant facts of mentioned entities.
Outcome: The proposed method outperforms existing methods on two benchmarks over different knowledge graphs.
LoRAPrune: Structured Pruning Meets Low-Rank Parameter-Efficient Fine-Tuning (2024.findings-acl)

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Challenge: Low-rank adaption (LoRA) is a low-level pruning method that can be expensive and slow to deploy.
Approach: They propose a low-rank adaption pruning framework that provides an accurate structured pruned model in a memory-efficient manner.
Outcome: The proposed pruning framework reduces perplexity and memory usage by 52.6% on LLaMA and T5 models while reducing memory usage.
Friendly Topic Assistant for Transformer Based Abstractive Summarization (2020.emnlp-main)

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Challenge: Abstractive document summarization is a comprehensive task in natural language processing.
Approach: They propose a topic assistant that rearranges and learns document semantics . they propose TA that is compatible with Transformer-based models and user-friendly .
Outcome: The proposed model is compatible with Transformer-based models and user-friendly.
PSSAT: A Perturbed Semantic Structure Awareness Transferring Method for Perturbation-Robust Slot Filling (2022.coling-1)

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Challenge: Existing slot filling models memorize inherent patterns of entities and contexts from training data.
Approach: They propose a perturbed semantic structure awareness transferring method for slot filling models . they use two MLM-based training strategies to learn contextual semantic structure and word distribution .
Outcome: The proposed method outperforms existing methods and gains strong generalization while preventing model from memorizing inherent patterns of entities and contexts.
From Redundancy to Relevance: Information Flow in LVLMs Across Reasoning Tasks (2025.naacl-long)

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Challenge: Large visionlanguage models (LVLMs) are a powerful visual-language reasoning tool.
Approach: They propose to integrate attention analysis with LLaVA-CAM to determine interactions between visual representations.
Outcome: The proposed approach can be used to determine interactions between visual representations.
LLM-Enhanced Query Generation and Retrieval Preservation for Task-Oriented Dialogue (2025.findings-acl)

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Challenge: Existing knowledge retrieval methods for task-oriented dialogues are limited by data scarcity and lack of data to annotate.
Approach: They propose an LLM-enhanced model of query-guided knowledge retrieval for task-oriented dialogue . they propose to select the most relevant knowledge from retrieved top-K records and incorporate them as prompts to guide a generator in response generation.
Outcome: The proposed model outperforms state-of-the-art in three benchmarks on three standard benchmarks.
Traffic-R1: Reinforced LLMs Bring Human-Like Reasoning to Traffic Signal Control Systems (2026.acl-long)

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Challenge: Rapid urbanization and surging vehicle ownership intensify congestion . rapid urbanization drives crash rates, slow emergency response, and burden transit-poor communities .
Approach: They introduce a 3B-parameter foundation model with human-like reasoning for Traffic signal control (TSC) they use reinforcement learning and network communication to convert LLM into a traffic-control model that operates like a human traffic agent.
Outcome: The proposed model outperforms baselines and training-intensive RL controllers on a simulated traffic environment and reduces queue lengths by more than 5%.
One Pair Suffices: Unlocking Universal Zero-Shot Translation via Cross-Architecture Alignment (2026.acl-long)

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Challenge: Current paradigms for empowering Large Language Models with multilingual capabilities rely heavily on massive instruction tuning.
Approach: They propose a hybrid cross-alignment approach that fuses a frozen NLLB encoder with a Qwen decoder via a closed-loop dual-adapter architecture.
Outcome: The proposed model outperforms towerPlus-9B and Aya-101 on language-agnostic projection protocols.
HCSpec: Two-Tier Horizontal Cascade Speculative Decoding for High-Efficiency Large Language Model Inference (2026.acl-long)

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Challenge: Existing approaches to decode large language models adopt a homogeneous architecture . autoregressive decoding is a bottleneck because tokens must be generated sequentially .
Approach: They propose a framework that organizes heterogeneous position-specialized draft modules into a horizontal cascade.
Outcome: The proposed framework outperforms the current state-of-the-art (EAGLE3) and achieves 3.72x acceleration over vanilla decoding.
Fine-Grained Data Ordering Improves Fine-Tuning for Large Language Models (2026.findings-acl)

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Challenge: Prior work focused on data preprocessing, focusing on filtering and cleaning data . a study aimed to improve fine-grained scheduling of data order in epochs .
Approach: They propose a fine-grained scheduling method of data order in epochs to fill this gap . they define data difficulty based on relevance between data and model .
Outcome: The proposed method improves on pre-training and small-scale fine-tuning experiments 2.4% over baselines.
LatticeGen: Hiding Generated Text in a Lattice for Privacy-Aware Large Language Model Generation on Cloud (2024.findings-naacl)

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Challenge: Currently, the server controls the generated text, but users can't keep it private . prompted generation is a common interaction paradigm for large language models on cloud .
Approach: They propose a protocol where the server handles most of the computation while the client controls the sampling operation.
Outcome: The proposed protocol protects both prompt and generation under strong attacks.
LLMsPark: A Benchmark for Evaluating Large Language Models in Strategic Gaming Contexts (2025.findings-emnlp)

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Challenge: Large language models (LLMs) are increasingly important for their intelligence evaluation.
Approach: They propose a game theory-based evaluation platform that measures LLMs’ decision-making strategies and social behaviors in classic game-theoretic settings.
Outcome: The proposed system cross-evaluates 15 leading LLMs using leaderboard rankings and scoring mechanisms.
Vision-Enhanced Semantic Entity Recognition in Document Images via Visually-Asymmetric Consistency Learning (2023.emnlp-main)

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Challenge: Existing models train a visual encoder with weak cross-modal supervision signals, resulting in a limited capacity to capture non-textual features and suboptimal performance.
Approach: They propose a Visually-Asymmetric coNsistenCy Learning approach that enhances the model’s ability to capture fine-grained visual and layout features through the incorporation of color priors.
Outcome: The proposed approach outperforms the strong LayoutLM series baseline on benchmark datasets and provides insights for optimizing model performance.
Beyond Hard Masks: Progressive Token Evolution for Diffusion Language Models (2026.acl-long)

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Challenge: Existing Diffusion Language Models rely on hard binary masking and discrete token assignments, which hinder the revision of early decisions.
Approach: They propose a diffusion-based language modeling approach that replaces hard binary masks with evolving soft token distributions.
Outcome: The proposed approach outperforms existing DLMs on multiple benchmarks.
Clustering and Ranking: Diversity-preserved Instruction Selection through Expert-aligned Quality Estimation (2024.emnlp-main)

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Challenge: Existing methods for instruction data selection have limitations such as relying on fragile external APIs, being affected by biases in GPT models, or reducing the diversity of the selected instruction dataset.
Approach: They propose an industrial-friendly, expert-aligned and diversity-preserved instruction data selection method: Clustering and Ranking (CaR).
Outcome: The proposed method outperforms Alpaca's existing methods by 32.1% in GPT-4 evaluations.
Sentiment Word Aware Multimodal Refinement for Multimodal Sentiment Analysis with ASR Errors (2022.findings-acl)

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Challenge: Existing models for multimodal sentiment analysis are limited in their capacity to be deployed in the real world.
Approach: They propose a model that can dynamically refine erroneous sentiment words by leveraging multimodal sentiment clues.
Outcome: The proposed model surpasses the state-of-the-art models on three datasets.
Exploring Logically Dependent Multi-task Learning with Causal Inference (2020.emnlp-main)

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Challenge: Hierarchical multi-task learning models can utilize task dependencies by stacking encoders and outperform democratic ones.
Approach: They propose a model that utilizes the labels of all lower-level tasks and a Gumbel sampling model to deal with cascading errors.
Outcome: The proposed model outperforms democratic models on six out of seven subtasks and achieves state-of-the-art on the two English and one Chinese datasets.
SelfAug: Mitigating Catastrophic Forgetting in Retrieval-Augmented Generation via Distribution Self-Alignment (2025.findings-emnlp)

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Challenge: Existing solutions for supervised fine-tuning often lead to catastrophic forgetting, where models lose their previously acquired knowledge and general capabilities.
Approach: They propose a self-distribution alignment method that aligns input sequence logits to preserve the model’s semantic distribution, thereby mitigating catastrophic forgetting and improving downstream performance.
Outcome: The proposed method achieves a superior balance between downstream learning and general capability retention.
EpiGEN: An Efficient Multi-Api Code GENeration Framework under Enterprise Scenario (2024.lrec-main)

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Challenge: Existing approaches to large language models fail to meet expectations for code generation tasks . existing approaches are faced with drawbacks of high resource consumption and inadequate handling of multi-API tasks.
Approach: They propose an Efficient multi-Api code GENeration framework that uses private APIs to pre-train LLMs.
Outcome: The proposed framework shows good acceptability and readability on single-GPU tasks compared to fully fine-tuned LLMs with a larger number of parameters.
Dynamic Oracle for Neural Machine Translation in Decoding Phase (L18-1)

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Challenge: Existing methods to improve NMT performance but there is a discrepancy between training and inference when decoding.
Approach: They propose to use Scheduled Sampling to reduce the discrepancy between training and inference in NMT when decoding to mitigate the discrépancy.
Outcome: The proposed methods improve translation quality over standard NMT system.
TabPrompt: Graph-based Pre-training and Prompting for Few-shot Table Understanding (2023.findings-emnlp)

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Challenge: Existing methods of Table Understanding (TU) focus on the textual content within the tabular data, disregarding the topological information of the table.
Approach: They propose a framework that uses tabs to understand tabular data without ignoring the topological information of the table.
Outcome: The proposed framework outperforms baselines in few-shot table understanding tasks.
When Efficiency Meets Safety: A Benchmark Security Analysis of KV Cache Compression in Large Language Models (2026.acl-long)

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Challenge: Key-Value (KV) caching is widely used in large language models to enable long-context inference efficiently, yet its security implications remain underexplored.
Approach: They propose a history-aware, per-head feedback merging strategy that prevents safety degradation while maintaining efficiency.
Outcome: The proposed strategy prevents safety degradation while maintaining efficiency.
Capture Human Disagreement Distributions by Calibrated Networks for Natural Language Inference (2022.findings-acl)

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Challenge: Previously, it's common to disregard it as noise or as a sign of poor-quality data, as their annotations are heavily based on personal experience and opinions.
Approach: They propose to capture the human disagreement distribution from the perspective of model calibration.
Outcome: The proposed model can achieve competitive performance when well-calibrated, on divergence scores between predictive probability and the true human opinion distribution, and the accuracy.
Efficient Self-Evaluation for Diffusion Language Models via Sequence Regeneration (2026.acl-long)

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Challenge: Non-sequential and bidirectional nature of diffusion large language models makes direct likelihood-based self-evaluation challenging.
Approach: They propose a self-evaluation confidence quantification method for diffusion large language models that quantifies confidence by computing the probability of regenerating tokens in the entire generated sequence, given the full context.
Outcome: The proposed method is correlated with semantic coherence and answer accuracy.
A Cognitive Writing Perspective for Constrained Long-Form Text Generation (2025.findings-acl)

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Challenge: Large Language Models struggle to generate high-quality long-form text in a single pass . a new framework that trains LLMs to write human-like writing capabilities is needed .
Approach: They propose a framework that equips large language models with human-like cognitive writing capabilities . they use a planning agent and multiple Generation Agents to generate long-form text in parallel .
Outcome: CogWriter surpasses GPT-4o by 22% in complex instruction completion accuracy . the framework can generate coherent text in a single pass with fluency that rivals human writers .
Mixture of Multimodal Adapters for Sentiment Analysis (2025.naacl-long)

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Challenge: Pre-trained language models (PLMs) have been used for text sentiment analysis but sentiment is hidden in other modalities.
Approach: They propose to fuse emotions from different data to analyze sentiments . they use compression parameter for each expert to reduce training burden .
Outcome: The proposed method achieves state-of-the-art with a tiny trainable parameter count compared to current methods . emotions hidden in body movements or vocal timbres eclipse traditional methods compared with text sentiment analysis .
Rethinking Document-level Neural Machine Translation (2022.findings-acl)

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Challenge: Neural machine translation models are weak enough for document-level translation . current models only translate sentences individually, resulting in poor document coherence .
Approach: They propose to use the original Transformer model to test document-level neural machine translation . they find that the original transformer models can achieve strong results for document translation if trained properly .
Outcome: The proposed model outperforms sentence-level models on nine datasets and two sentence- level datasets across six languages.
Improved Pseudo Data for Machine Translation Quality Estimation with Constrained Beam Search (2023.emnlp-main)

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Challenge: evaluating the quality of machine translation outputs becomes increasingly essential with the rapid development of machine language (MT).
Approach: They propose to generate pseudo data using the MT model with constrained beam search (CBSQE) they propose to preserve the reference parts with high MT probabilities as correct translations .
Outcome: The proposed model outperforms strong baselines in both supervised and unsupervised settings.
Teaching Small Language Models Reasoning through Counterfactual Distillation (2024.emnlp-main)

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Challenge: Large language models (LLMs) have demonstrated remarkable performance in a wide range of downstream tasks.
Approach: They propose a counterfactual distillation framework that leverages LLMs to generate high-quality counterfacts and utilizes multi-view CoT to enhance the diversity of reasoning samples.
Outcome: The proposed framework enhances reasoning capabilities of large language models and is more robust to OOD data.
EvoHyper: Evolving Hypergraph Topologies for Unified Collaboration in Multi-Agent Communication (2026.findings-acl)

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Challenge: Existing methods for multi-agent collaboration use a fixed communication graph and manage collaboration structure and shared memory in separate modules.
Approach: They propose a framework that uses an evolving hypergraph topology for multi-agent collaboration.
Outcome: The proposed framework achieves 3.2% to 7.8% accuracy gains over state-of-the-art methods and efficient, reducing token consumption by up to 23.5%.
Incorporating Instructional Prompts into a Unified Generative Framework for Joint Multiple Intent Detection and Slot Filling (2022.coling-1)

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Challenge: Existing approaches to multiple intent detection and slot filling focus on task-specific components to capture the relationships between intents and slots.
Approach: They propose a Unified Generative framework that captures the relationships between intents and slots in an utterance and formulates the task as a question-answering problem.
Outcome: The proposed framework surpasses baselines on full-data and multi-intent benchmarks on 5-shot and 10-shot scenarios.
FAER: Benchmarking VLMs for Failure-Aware Embodied Reasoning (2026.findings-acl)

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Challenge: Visual-language models (VLMs) are the core component of embodied agents in perceiving the environment and making decisions.
Approach: They propose a failure-aware benchmark to evaluate the performance of visual language models (VLMs) in long-horizon tasks.
Outcome: The proposed benchmark evaluates the performance of 16 widely utilized VLMs and 4 LLMs for FAER tasks.
INarIG: Iterative Non-autoregressive Instruct Generation Model For Word-Level Auto Completion (2023.findings-emnlp)

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Challenge: Existing models for word-level autocompletion (WLAC) only use human typed sequences as prefixes in decoding module.
Approach: They propose a novel iterative nonautoregressive instruct generation model for WLAC task . it uses human typed sequences and iterating decoding with subwords to fully utilize input information.
Outcome: The proposed model is more competent in dealing with low-frequency words, and achieves state-of-the-art results on the WMT22 and benchmark datasets.
TLM: Token-Level Masking for Transformers (2023.emnlp-main)

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Challenge: Structured dropout approaches have been investigated to regularize the multi-head attention mechanism in Transformers.
Approach: They propose a new regularization scheme based on token-level rather than structure-level to reduce overfitting by manipulating the connections between tokens in the multi-head attention via masking.
Outcome: The proposed regularization scheme outperforms attention dropout and DropHead on 18 datasets and can establish a new record on the data-to-text benchmark Rotowire (18.93 BLEU).
Idea23D: Collaborative LMM Agents Enable 3D Model Generation from Interleaved Multimodal Inputs (2025.coling-main)

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Challenge: Existing 3D AIGC methods don’t fully unleash human creativity.
Approach: They propose a framework that generates 3D content from multimodal inputs . they propose 198 multimodal text inputs for 3D generation tasks .
Outcome: The proposed framework generates 3D content from multimodal inputs without human intervention.
VisualEDU: A Benchmark for Assessing Coding and Visual Comprehension through Educational Problem-Solving Video Generation (2025.findings-emnlp)

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Challenge: VisualEDU is a benchmark to evaluate VLMs' ability to produce coherent video from text . advanced proprietary models show promise, but struggle with increasing task complexity .
Approach: VisualEDU is a benchmark to evaluate VLMs' ability to produce coherent video from text . it integrates meta-prompt learning, visual and code feedback, and a drawing toolkit to enhance output quality.
Outcome: VisualEDU is a benchmark to evaluate VLMs' ability to produce coherent video from text . it integrates meta-prompt learning, visual and code feedback, and a drawing toolkit to improve output quality.
Pruning via Merging: Compressing LLMs via Manifold Alignment Based Layer Merging (2024.emnlp-main)

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Challenge: Existing methods for parameter pruning fail to utilize the knowledge from pruned parameters.
Approach: They propose a method that uses manifold learning and the Information Bottleneck measure to merge similar layers to preserve model performance.
Outcome: The proposed method outperforms pruning methods on multiple datasets and LLMs with quantization and achieves substantial compression ratios.
PAL: Persona-Augmented Emotional Support Conversation Generation (2023.findings-acl)

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Challenge: Recent work has demonstrated the effectiveness of dialogue models in providing emotional support due to the lack of human resources for mental health support.
Approach: They propose a framework for dynamically inferring and modeling seekers’ persona from the conversation history and a model that leverages persona information to provide personalized emotional support.
Outcome: The proposed model outperforms baseline models on the studied benchmark.
Cross-Lingual Contrastive Learning for Fine-Grained Entity Typing for Low-Resource Languages (2022.acl-long)

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Challenge: Experimental results show that by applying our framework, we can easily learn effective FGET models for low-resource languages.
Approach: They propose a cross-lingual contrastive learning framework to learn FGET models for low-resource languages.
Outcome: The proposed framework can learn effective FGET models for low-resource languages even without human-labeled data.
To What Extent Do Natural Language Understanding Datasets Correlate to Logical Reasoning? A Method for Diagnosing Logical Reasoning. (2022.coling-1)

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Challenge: Reasoning and knowledge-related skills are considered as fundamental skills for natural language understanding (NLU) tasks.
Approach: They propose a method to diagnose correlations between an NLU dataset and a specific skill.
Outcome: The proposed method is able to diagnose correlations between dataset and logical reasoning skill on 8 MRC and 3 NLI datasets.
ClueAnchor: Clue-Anchored Knowledge Reasoning Exploration and Optimization for Retrieval-Augmented Generation (2025.findings-emnlp)

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Challenge: Existing RAG systems often underutilize the retrieved documents, authors say . they fail to extract and integrate key clues needed to support faithful and interpretable reasoning .
Approach: a new framework extracts key clues from retrieved content and generates multiple reasoning paths . the framework optimizes the model by selecting the most appropriate reasoning path .
Outcome: Experiments show that ClueAnchor outperforms baseline RAG frameworks in completeness and robustness.
LLMRouterBench: A Massive Benchmark and Unified Framework for LLM Routing (2026.findings-acl)

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Challenge: Large language model (LLM) routing assigns each query to the best suitable model from an ensemble.
Approach: They introduce a large-scale benchmark and unified framework for LLM routing . they find that many routing methods exhibit similar performance under unified evaluation .
Outcome: The proposed benchmark provides comprehensive metrics for both performance-oriented and performance-cost trade-off routing.
Chain-of-Thought Tuning: Masked Language Models can also Think Step By Step in Natural Language Understanding (2023.emnlp-main)

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Challenge: Chain-of-Thought (CoT) is a technique that guides large language models to decompose complex tasks into multi-step reasoning processes.
Approach: They propose a two-step reasoning framework based on prompt tuning to implement step-by-step thinking for MLMs on NLU tasks.
Outcome: The proposed framework outperforms baselines and achieves state-of-the-art performance on two NLU tasks.
Rethinking Data Mixing from the Perspective of Large Language Models (2026.acl-short)

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Challenge: Existing methods to mix data with LLMs have relied on domain definitions derived from intuition.
Approach: They propose a reweighting framework that restructures data scheduling as a graph-constrained optimization problem.
Outcome: The proposed framework achieves competitive performance on GPT-2 models.
MAVEN-ERE: A Unified Large-scale Dataset for Event Coreference, Temporal, Causal, and Subevent Relation Extraction (2022.emnlp-main)

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Challenge: Existing datasets only cover limited relation types at once, which prevents models from taking full advantage of relation interactions.
Approach: They construct a large-scale human-annotated ERE dataset with improved annotation schemes to address these drawbacks.
Outcome: The proposed dataset is larger than existing datasets of all the ERE tasks by at least an order of magnitude.
ALPS: Attention Localization and Pruning Strategy for Efficient Adaptation of Large Language Models (2025.findings-acl)

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Challenge: Prior research has focused on optimizing general-purpose large language models to downstream tasks . however, these approaches inherently introduce data dependency, which hinders generalization and reusability.
Approach: They propose an algorithm that localizes the most task-sensitive attention heads and prunes by restricting attention training updates to these heads, thereby reducing alignment costs.
Outcome: The proposed algorithm achieves 2% performance improvement over baselines on three tasks while localizing the most task-sensitive attention heads.
MorphoBench: A Benchmark with Difficulty Adaptive to Model Reasoning (2026.findings-acl)

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Challenge: Existing benchmarks designed to evaluate the reasoning capabilities of large models are limited in scope and lack flexibility to adapt difficulty according to evolving reasoning capacities of models.
Approach: They propose a benchmark that incorporates multidisciplinary questions to evaluate the reasoning capabilities of large models and can adjust and update question difficulty based on the reasoning abilities of advanced models.
Outcome: The proposed benchmark incorporates multidisciplinary questions to evaluate the reasoning capabilities of large models and can adjust and update question difficulty based on the reasoning abilities of advanced models.
LearnAct: Few-Shot Mobile GUI Agent with a Unified Demonstration Benchmark (2026.findings-acl)

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Challenge: Mobile GUI agents show promise in automating tasks but face significant generalization challenges in long-tail scenarios.
Approach: They propose a benchmark framework for mobile GUI agents that measures the performance of GUI agents by analyzing their performance.
Outcome: The LearnGUI benchmark outperforms existing methods in offline and online evaluations and demonstrates consistent gains across model architectures.
AMoPO: Adaptive Multi-objective Preference Optimization without Reward Models and Reference Models (2025.findings-acl)

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Challenge: Existing multi-objective preference alignment methods for large language models face limitations such as auxiliary reward/reference models and computational complexity.
Approach: They propose a framework that achieves dynamic balance across preference dimensions by using dimension-aware generation metrics as implicit rewards.
Outcome: Empirical results show that AMoPO outperforms state-of-the-art methods by 28.5% .
SensorLLM: Aligning Large Language Models with Motion Sensors for Human Activity Recognition (2025.emnlp-main)

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Challenge: SensorLLM is a timeseries classification framework that can perform human activity recognition tasks.
Approach: They propose a framework that enables Large Language Models to perform human activity recognition from sensor time-series data.
Outcome: The proposed framework can perform human activity recognition (HAR) tasks with human inputs.
SciVerse: Unveiling the Knowledge Comprehension and Visual Reasoning of LMMs on Multi-modal Scientific Problems (2025.findings-acl)

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Challenge: SciVerse is a multi-modal scientific evaluation benchmark to assess large multi-models . it examines the scientific knowledge comprehension, multi-mod content interpretation and Chain-of-Thought reasoning . authors examine the scientific proficiency of LMMs in scientific domains based on their work .
Approach: They propose a multi-modal scientific evaluation benchmark to thoroughly assess Large Multi-modal Models across 5,735 test instances in five different versions.
Outcome: The proposed evaluation reveals critical limitations in LMMs' scientific proficiency and provides new insights into future developments.
MixKVQ: Query-Aware Mixed-Precision KV Cache Quantization for Long-Context Reasoning (2026.acl-long)

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Challenge: Existing low-bit quantization methods often exhibit severe performance degradation on complex reasoning tasks.
Approach: They propose a plug-and-play method that uses a key channel's intrinsic quantization difficulty and relevance to the query to identify and preserve critical key channels that need higher precision.
Outcome: Experiments on complex reasoning datasets show that the proposed method outperforms low-bit methods at a substantially reduced memory footprint.
S2GSL: Incorporating Segment to Syntactic Enhanced Graph Structure Learning for Aspect-based Sentiment Analysis (2024.acl-long)

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Challenge: Existing graph-based approaches to learn static structures and dynamic latent trees are lacking in incorporating semantic and syntactic information simultaneously within complex global structures.
Approach: They propose a graph-based framework that incorporates semantic and syntactic information simultaneously within global structures.
Outcome: The proposed framework removes irrelevant contexts and syntactic dependencies and achieves complementarity across diverse structures.
De-Confounded Variational Encoder-Decoder for Logical Table-to-Text Generation (2021.acl-long)

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Challenge: Logical table-to-text generation is challenging where deep learning models capture surface-level spurious correlations rather than the causal relationships between the table x and the sentence y.
Approach: They propose to use variational inference to estimate the confounders in the latent space and cooperate with the causal intervention based on Pearl’s do-calculus to alleviate the spurious correlations.
Outcome: The proposed model outperforms baselines and achieves new state-of-the-art performance on two logical table-to-text datasets in terms of logical fidelity.
Overcoming Catastrophic Forgetting During Domain Adaptation of Seq2seq Language Generation (2022.naacl-main)

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Challenge: Existing work on lifelong learning requires incremental memory space to learn a model . existing work on experience replay or elastic weighted consolidation requires incremental space .
Approach: They propose a framework that leverages a recall optimization mechanism to memorize parameters of previous tasks via regularization and a domain drift estimation algorithm to compensate the drift between different domains in the embedding space.
Outcome: The proposed framework outperforms SOTA models on paraphrase and dialog response generation tasks.
Reinforced Counterfactual Data Augmentation for Dual Sentiment Classification (2021.emnlp-main)

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Challenge: Existing approaches to improve generalization ability by augmenting training data with synonymous examples or adding random noises to word embeddings cannot address spurious association problem.
Approach: They propose an end-to-end reinforcement learning framework which jointly performs counterfactual data generation and dual sentiment classification.
Outcome: The proposed framework outperforms strong data augmentation baselines on several benchmark sentiment classification datasets.
LEDGER: Scaling Agentic Document Editing with Dependency-aware Graph Retrieval (2026.findings-acl)

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Challenge: Document editing requires full-context awareness of dependencies, but processing entire documents for each edit incurs prohibitive token costs and latency.
Approach: a framework that constructs lightweight dependency graphs captures semantic relationships and structural hierarchies across document elements is proposed for agentic document editing . a scaLing agentic agentic framework is based on a dependency graph framework that captures dependencies and refactors function dependencies.
Outcome: a new framework achieves 76 consistency versus 56 baseline while reducing token usage by 85 . the framework is based on a framework that captures semantic relationships and structural hierarchies across document elements . it can be used to improve document consistency, but it also reduces token costs and latency .
Stable Language Guidance for Vision–Language–Action Models (2026.acl-long)

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Challenge: Existing vision-Language-Action models are notoriously brittle to linguistic perturbations.
Approach: They propose a probabilistic framework that disentangles physical affordance from semantic execution.
Outcome: The proposed framework disentangles physical affordance from semantic execution.
UCL-Bench: A Chinese User-Centric Legal Benchmark for Large Language Models (2025.findings-naacl)

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Challenge: Existing legal benchmarks focusing on knowledge and logic evaluate LLMs on various tasks in legal domain, but few have explored the practical application of LLM by actual users.
Approach: They propose a Chinese user-centric legal benchmark that aims to assess the practical application of LLMs by real users.
Outcome: The proposed model outperforms existing models on various tasks in legal domain but does not outperfect ChatGPT.
DUET: Joint Exploration of User–Item Profiles in Recommendation System (2026.findings-acl)

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Challenge: Existing LLMs are opaque and difficult to interpret, resulting in limited interpretability.
Approach: They propose an interaction-aware profile generator that jointly produces user and item profiles conditioned on both user history and item evidence.
Outcome: The proposed model outperforms baselines on three real-world datasets.
Not All Directions Matter: Towards Structured and Task-Aware Low-Rank Model Adaptation (2026.acl-long)

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Challenge: Low-Rank Adaptation (LoRA) is a key parameter-efficient fine-tuning method . however, its effectiveness is hampered by semantic drift and structural incoherence .
Approach: They propose a low-rank Adaptation framework that tackles semantic drift and structural incoherence by pruning task-irrelevant directions.
Outcome: Experiments on large language models, vision models, and vision models show that the proposed framework outperforms LoRA and advanced dynamic rank allocation and sparsity-based methods.
TAG : Type Auxiliary Guiding for Code Comment Generation (2020.acl-main)

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Challenge: Existing code comment generation approaches ignore type information of interpretation of the code, e.g., operator, string, etc. Existing approaches ignore the type information due to the hierarchical dependence among the type.
Approach: They propose an encoder-decoder framework which considers the source code as an N-ary tree with type information associated with each node.
Outcome: The proposed framework is based on a Type Auxiliary Guiding encoder-decoder framework and a type-restricted Decoder to resolve training difficulties.
Communication-Efficient Desire Alignment for Proactive Embodied Human–Agent Interaction (2026.acl-long)

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Challenge: Effective real-world human–agent interactions are long-term and repeated.
Approach: They propose a simulation that uses a proxy user with value-driven preferences and natural language behavior to evaluate how agents adapt to users across interactions and satisfy their desires.
Outcome: HA-Desire, a home assistance simulation, shows that agents can adapt to user needs and provide proactive assistance within limited communication.
JanusMM: A Benchmark for Self-Deprecation Understanding in Real-World Multimodal Conversations (2026.acl-long)

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Challenge: Multimodal large language models (MLLMs) are a common communicative strategy in human society, often using image-text interplay to express emotions and intentions.
Approach: They propose to evaluate multimodal large language models (MLLMs)' understanding of self-deprecation in real-world conversations using 2,016 bilingual memes.
Outcome: The proposed framework evaluates MLLMs' understanding of self-deprecation in real-world conversations.
PromptRank: Unsupervised Keyphrase Extraction Using Prompt (2023.acl-long)

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Challenge: Existing keyphrase extraction methods struggle with document and candidate length discrepancies or fail to fully utilize the pre-trained language model without further fine-tuning.
Approach: They propose an unsupervised keyphrase extraction approach that uses a pre-trained language model to rank candidates based on document embeddings.
Outcome: The proposed approach outperforms the existing keyphrase extraction approach on six benchmarks.
Beyond the Surface: Measuring Self-Preference in LLM Judgments (2025.emnlp-main)

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Challenge: Existing methods measure self-preference bias by comparing the scores a judge model assigns to its own responses with those assigned to other models.
Approach: They propose to use gold judgments as proxies for the actual quality of responses . they propose to measure self-preference bias as the difference between the judge model's own and other models' scores .
Outcome: The proposed method can assess self-preference bias across large language models . it uses gold judgments as proxies for the ground truth scores of the judge model .
A Semantically Consistent and Syntactically Variational Encoder-Decoder Framework for Paraphrase Generation (2020.coling-main)

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Challenge: Paraphrase generation is a longstanding problem in natural language processing (NLP) Neural network-based methods have shown great progress on paraphrase generation.
Approach: They propose a framework that integrates variational inference on a target-related latent variable to introduce the diversity.
Outcome: The proposed framework outperforms baseline models on the metrics based on n-gram matching and semantic similarity, and it can generate multiple different paraphrases by assembling different syntactic variables.
PRA-RAG: Provably Robust Aggregation in Retrieval-Augmented Generation against Retrieval Corruption (2026.findings-acl)

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Challenge: Existing defense mechanisms lack theoretical robustness guarantees and perform unreliably when the LLM has limited knowledge of the retrieved content.
Approach: They propose a provably robust retrieval aggregation algorithm designed to defend against poisoning attacks on retrieved texts.
Outcome: Experiments show that PRA-RAG reduces the attack success rate to as low as 1% while maintaining an accuracy of 71%, significantly outperforming representative state-of-the-art (SOTA) methods.
C-ReD: A Comprehensive Chinese Benchmark for AI-Generated Text Detection Derived from Real-World Prompts (2026.findings-acl)

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Challenge: Recent efforts to develop algorithms for large language models (LLMs) have limited model diversity and data homogeneity in the Chinese corpora.
Approach: They propose a Chinese Real-prompt AI-generated text Detection benchmark that can be generalized to unseen LLMs and external Chinese datasets.
Outcome: The proposed benchmarks address critical gaps in model diversity, domain coverage, and prompt realism that have limited prior Chinese detection benchmarks.
PedagogyBench: A Cognitive-Driven Benchmark for Multimodal Instructional Video Understanding (2026.findings-acl)

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Challenge: Existing video understanding benchmarks do not adequately capture the pedagogical logic embedded in instructional videos.
Approach: They propose a pedagogy-driven segmentation strategy and a dual-stream semantic injection pipeline that combines machine pre-annotation with expert refinement.
Outcome: The proposed model performs well on discriminative tasks but degrades on higher-order pedagogical diagnosis, relying on parametric memory rather than grounded visual perception.
Match, Compare, or Select? An Investigation of Large Language Models for Entity Matching (2025.coling-main)

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Challenge: Entity matching (EM) is a critical step in entity resolution (ER).
Approach: They propose a method that incorporates record interactions from different perspectives.
Outcome: The proposed framework improves on 8 ER datasets and 10 LLMs and achieves higher efficiency and effectiveness.
FinRipple: Aligning Large Language Models with Financial Market for Event Ripple Effect Awareness (2025.findings-acl)

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Challenge: Financial markets exhibit complex dynamics where localized events trigger ripple effects across entities.
Approach: They propose a framework that empowers large language models to analyze ripple effects . they use financial theory-guided large-scale reinforcement learning to align LLMs with the market .
Outcome: The proposed framework allows LLMs to analyze ripple effects through financial theory-guided large-scale reinforcement learning.
LongInsightBench: A Comprehensive Benchmark for Evaluating Omni-Modal Models on Human-Centric Long-Video Understanding. (2026.findings-acl)

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Challenge: LongInsightBench is the first benchmark designed to assess models’ ability to understand long videos, with a focus on human language, viewpoints, actions, and other contextual elements.
Approach: They propose a benchmark to assess models’ ability to understand long videos with a focus on human language, viewpoints, actions, and other contextual elements.
Outcome: The proposed model excels in three key areas: a) long-duration, human-centric videos; b) diversifying and challenging task scenarios; c) quality assurance pipeline; and d) reliability.
Learning from Emptiness: De-biasing Listwise Rerankers with Content-Agnostic Probability Calibration (2026.acl-short)

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Challenge: Existing methods for listwise reranking exhibit intrinsic position bias . existing methods are constrained by an inherent trade-off between efficiency and flexibility .
Approach: They propose a training-free framework that mechanically decouples positional bias from ranking decisions.
Outcome: a training-free framework decouples position bias from ranking decisions . evaluations show it outperforms training-based methods and outperformed expensive methods .
Breaking the Reasoning Barrier A Survey on LLM Complex Reasoning through the Lens of Self-Evolution (2025.findings-acl)

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Challenge: OpenAI's O1 and subsequent projects like DeepSeek R1 have significantly advanced research on complex reasoning in LLMs.
Approach: They analyze existing reasoning studies from the perspective of self-evolution and summarize O1-like works from open-source projects like DeepSeek R1 and Kimi-k1.5.
Outcome: The proposed models are based on open-source models and pioneer advanced methodologies like Scaling Reinforcement Learning (RL).
Long-form Hallucination Detection with Self-elicitation (2025.findings-acl)

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Challenge: Existing methods for hallucination detection tend to decompose text into isolated statements, unable to understand contextual semantics.
Approach: They propose a framework to leverage self-generated thoughts derived from prior statements as catalysts to elicit the expression of intrinsic knowledge and understand contextual semantics.
Outcome: The proposed framework enables self-elicitation to elicit expressions of knowledge and understand semantics.
AJ-Bench: Benchmarking Agent-as-a-Judge for Environment-Aware Evaluation (2026.findings-acl)

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Challenge: Existing approaches to verify agent behaviors in complex environments rely on rule-based verifiers or LLM-as-a-Judge models.
Approach: They propose a benchmark to evaluate Agent-as-a-Judge across three domains . the benchmark covers search, data systems, and graphical user interfaces - with 155 tasks and 516 trajectories .
Outcome: The proposed benchmark outperforms existing benchmarks in search, data systems, and GUI domains while revealing open challenges in agent-based verification.
UnitedQA: A Hybrid Approach for Open Domain Question Answering (2021.acl-long)

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Challenge: Recent work on open-domain question answering focuses on either extractive or generative readers exclusively.
Approach: They propose a hybrid approach to extractive and generative readers that leverages both models.
Outcome: The proposed approach outperforms state-of-the-art models on NaturalQuestions and TriviaQA respectively.
ACEBench: A Comprehensive Evaluation of LLM Tool Usage (2025.findings-emnlp)

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Challenge: Existing benchmarks for evaluating LLMs’ tool usage face several limitations: limited evaluation scenarios, lacking assessments in real multi-turn dialogue contexts; narrow evaluation dimensions, with insufficient detailed assessments of how LLM use tools; and reliance on LLM or real API executions for evaluation, which introduces significant overhead.
Approach: ACEBench is a benchmark for evaluating tool usage in Large Language Models . it categorizes data into three primary types based on evaluation methodology: Normal, Special, and Agent.
Outcome: ACEBench categorizes data into three primary types based on evaluation methodology: Normal, Special, and Agent.
PRompt Optimization in Multi-Step Tasks (PROMST): Integrating Human Feedback and Heuristic-based Sampling (2024.emnlp-main)

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Challenge: Prompt optimization aims to find the best prompt to a large language model (LLM) for a given task.
Approach: They propose a method to optimize prompts for LLM-driven multi-step tasks using a human-designed feedback rule.
Outcome: The proposed method outperforms human-engineered prompts and several other prompt optimization methods on 11 representative multi-step tasks.
Class Lifelong Learning for Intent Detection via Structure Consolidation Networks (2023.findings-acl)

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Challenge: Existing intent detection models can only handle predefined intent classes in the offline environment.
Approach: They propose a method that continually learns new intent classes from new data . structure-based retrospection and contrastive knowledge distillation are used to solve these problems .
Outcome: The proposed method outperforms existing models on three benchmarks.
Towards Persona-Based Empathetic Conversational Models (2020.emnlp-main)

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Challenge: Empathetic conversational models have been shown to improve user satisfaction and task outcomes in numerous domains.
Approach: They propose a task towards persona-based empathetic conversations and propose e-learning model CoBERT that can be used to train persona on emmpathetic conversations.
Outcome: The proposed model improves empathetic responding more when trained on e-mpathetic conversations than non-empathy ones.
Optimizing Instruction Synthesis: Effective Exploration of Evolutionary Space with Tree Search (2024.findings-emnlp)

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Challenge: Extensive research has highlighted the quality of instruction data is essential for the success of this alignment.
Approach: They propose a framework for iteratively improving existing instruction data by using Monte Carlo tree search to find suitable prompts that align the language model to effectively learn multiple skills.
Outcome: The proposed framework improves the evaluation scores of seed instruction data, raising the average evaluation scores from 2.19 to 3.81.
𝒮2IT: Stepwise Syntax Integration Tuning for Large Language Models in Aspect Sentiment Quad Prediction (2025.findings-naacl)

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Challenge: Aspect Sentiment Quad Prediction (ASQP) is an extractive task that focuses on predicting tuples of sentiment-related elements from a given text.
Approach: They propose a stepwise syntax integration tuning framework that integrates syntactic structure knowledge into LLMs through a multi-step tuning process.
Outcome: The proposed framework integrates syntactic structure knowledge into large language models . it decomposes the quadruple generation task into two stages . the proposed framework significantly improves state-of-the-art performance across multiple datasets .
Finetuning Pretrained Transformers into RNNs (2021.emnlp-main)

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Challenge: Efficient transformers outperform recurrent neural networks in natural language generation, but this comes with significant computational cost and memory footprint during generation.
Approach: They propose to convert a pretrained transformer into its efficient recurrent counterpart, improving efficiency while maintaining accuracy.
Outcome: The proposed transformers outperform recurrent neural networks in natural language generation but come with significant computational and memory footprint during generation.
LPO: Towards Accurate GUI Agent Interaction via Location Preference Optimization (2026.findings-acl)

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Challenge: Existing strategies for spatial localization are limited due to their limited capacity to perceive positional data.
Approach: They propose a location-based approach that leverages locational data to optimize interaction preferences.
Outcome: The proposed approach achieves SOTA results across offline benchmarks and real-world evaluations.
Handling Missing Entities in Zero-Shot Named Entity Recognition: Integrated Recall and Retrieval Augmentation (2025.naacl-long)

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Challenge: Zero-shot Named Entity Recognition (ZS-NER) aims to recognize entities in unseen domains without specific annotated data.
Approach: They propose a novel two-stage framework leveraging large language model techniques to improve the ZS-NER’s recall rate.
Outcome: The proposed framework improves the ZS-NER’s recall rate and accuracy by incorporating a large language model.
When to Continue Thinking: Adaptive Thinking Mode Switching for Efficient Reasoning (2025.findings-emnlp)

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Challenge: Large reasoning models (LRMs) incur excessive computational overhead due to redundant reasoning, especially on simple tasks.
Approach: They propose an Adaptive Self-Recovery Reasoning framework that suppresses unnecessary reasoning and enables implicit recovery.
Outcome: The proposed framework suppresses unnecessary reasoning and enables implicit recovery.
Active Layer-Contrastive Decoding Reduces Hallucination in Large Language Model Generation (2025.emnlp-main)

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Challenge: Recent decoding methods improve the factuality of large language models (LLMs) by refining how the next token is selected during generation.
Approach: They propose a decoding strategy that actively decides when to apply contrasting layers during generation by casting decoding as a sequential decision-making problem.
Outcome: The proposed method surpasses state-of-the-art methods across five benchmarks and mitigates hallucinations in diverse generation scenarios.
Zero-Shot Spoken Language Understanding via Large Language Models: A Preliminary Study (2024.lrec-main)

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Challenge: Recent advances in large language models (LLMs) have shown promising results in zero-shot settings, which motivates us to explore prompt-based methods.
Approach: They propose a two-stage framework which transforms the SLU task into a question-answering problem by directly prompting LLMs.
Outcome: The proposed framework can be built by directly prompting LLMs to understand user needs without training data.
Training Verifier to Assessing Complex Real-World Tool-Use Trajectories (2026.findings-acl)

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Challenge: Existing methods for training effective AI agents often resort to synthetic data generation.
Approach: They propose a plug-and-play framework for data quality control in tool-use scenarios . they construct a tool-verify dataset and release a benchmark to assess its performance .
Outcome: The proposed framework surpasses Qwen2.5-72B-Instruct on Tool-V-Bench and the previous APIGen-MT dataset.
AgentReview: Exploring Peer Review Dynamics with LLM Agents (2024.emnlp-main)

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Challenge: Existing methods of peer review analysis do not address multivariate nature of the process, account for latent variables, and are constrained by privacy concerns due to the sensitive nature of data.
Approach: They propose a large language model based peer review simulation framework which effectively disentangles the impacts of multiple latent factors and addresses the privacy issue.
Outcome: The proposed framework disentangles the impacts of multiple latent factors and addresses privacy concerns.
CFBench: A Comprehensive Constraints-Following Benchmark for LLMs (2025.acl-long)

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Challenge: Existing evaluations of Large Language Models (LLMs) focus on fragmented constraints or narrow scenarios, but they overlook the comprehensiveness and authenticity of constraints from the user’s perspective.
Approach: They propose a Chinese Comprehensive Constraints Following Benchmark for LLMs that compiles constraints from real-world instructions and constructs a systematic framework for constraint types.
Outcome: The proposed framework integrates multi-dimensional assessment criteria with requirement prioritization, covering various perspectives of constraints, instructions, and requirement fulfillment.
AIR-Bench: Automated Heterogeneous Information Retrieval Benchmark (2025.acl-long)

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Challenge: Evaluation benchmarks based on predefined domains and human-labeled data face limitations in addressing evaluation needs for emerging domains.
Approach: They propose an automated information retrieval benchmark based on predefined domains and human-labeled data . AIR-Bench is automated and Heterogeneous with three key features .
Outcome: The proposed benchmarks are based on predefined domains and human-labeled data.
Diagnosing the First-Order Logical Reasoning Ability Through LogicNLI (2021.emnlp-main)

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Challenge: Existing studies have focused on diagnosing LMs' reasoning abilities in natural language understanding tasks.
Approach: They propose a diagnostic method for first-order logic reasoning with a proposed benchmark, LogicNLI.
Outcome: The proposed method disentangles the target FOL reasoning from commonsense inference and can be used to diagnose LMs from four perspectives: accuracy, robustness, generalization, and interpretability.
FineReason: Evaluating and Improving LLMs’ Deliberate Reasoning through Reflective Puzzle Solving (2025.acl-long)

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Challenge: Recent advances in large language models (LLMs) highlight an important shift from the “System 1” way of quick reactions to the “system 2” style of reflection-and-correction problem solving.
Approach: They propose a logic-puzzle benchmark for systematic evaluation of large language models' reasoning capabilities that decomposes each puzzle into atomic steps.
Outcome: The proposed model improves on state checking and state transition tasks and demonstrates gains in reasoning by up to 5.1%.
METER: Evaluating Multi-Level Contextual Causal Reasoning in Large Language Models (2026.acl-long)

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Challenge: Existing benchmarks evaluate contextual causal reasoning in fragmented settings, failing to ensure context consistency or cover the full causal hierarchy.
Approach: They use a unified context to benchmark large language models' contextual causal reasoning skills.
Outcome: The proposed benchmarks show that LLMs are susceptible to distraction by irrelevant but factually correct information at lower level of causality.
Knowledge-to-SQL: Enhancing SQL Generation with Data Expert LLM (2024.findings-acl)

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Challenge: Existing methods for Generating accurate SQL queries for user questions rely on the capability of large language models (LLMs) however, some knowledge is not explicitly included in the database schema and user question or has been learned by LLMs.
Approach: They propose a Knowledge-to-SQL framework that employs tailored Data Expert LLM (DELLM) to provide helpful knowledge for all text-to SQL models.
Outcome: The proposed framework improves the state-of-the-art approaches for text-to-SQL tasks by leveraging a data expert LLM (DELLM) to provide useful knowledge for all text- to-SqL models.
Text Style Transfer Back-Translation (2023.acl-long)

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Challenge: Current methods require large amount of bilingual training data, which is challenging and sometimes impossible task.
Approach: They propose a method to modify the style of inputs by modifying the source side of BT data.
Outcome: The proposed method significantly improves translation quality against popular BT benchmarks on high-resource and low-resourced language pairs.
Probabilistic Graph Reasoning for Natural Proof Generation (2021.findings-acl)

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Challenge: Existing approaches to reasoning over formal representations do not explicitly consider inter-dependency between answers and proofs.
Approach: They propose a novel approach for joint answer prediction and proof generation using an induced graphical model.
Outcome: The proposed approach achieves 10%-30% improvement on QA accuracy in evaluations under diverse conditions.
A Novel Paradigm Boosting Translation Capabilities of Large Language Models (2024.findings-naacl)

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Challenge: Existing studies on LLMs focused on supervised fine-tuning but their effectiveness has been limited.
Approach: They propose a paradigm consisting of three stages: Secondary Pre-training using extensive monolingual data, Continual Pre- training with interlinear text format documents, and Leveraging source-language consistent instruction for supervised fine-tuning.
Outcome: The proposed approach surpasses previous work and achieves superior performance compared to models such as NLLB-54B(CITATION) and GPT3.5-text-davinci-003.
Enhancing Hyperbolic Knowledge Graph Embeddings via Lorentz Transformations (2024.findings-acl)

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Challenge: Existing methods for knowledge graph embedding rely on tangent approximation and are not fully hyperbolic.
Approach: They propose a fully hyperbolic KGE method that represents entities as points in the Lorentz model and represents relations as the intrinsic transformation.
Outcome: The proposed method captures various types of relations including hierarchical structures.
RAPID: Efficient Retrieval-Augmented Long Text Generation with Writing Planning and Information Discovery (2025.findings-acl)

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Challenge: Existing methods for knowledge-intensive long texts struggle with issues like hallucinations, topic incoherence, and significant latency.
Approach: They propose a retrieval-augmented long text generation framework with writing P**lanning and I**nformation to address these challenges.
Outcome: The proposed framework outperforms state-of-the-art methods on a freshWiki-2024 dataset.
Neighbors Are Not Strangers: Improving Non-Autoregressive Translation under Low-Frequency Lexical Constraints (2022.naacl-main)

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Challenge: Existing approaches to lexically constrained neural machine translation suffer from high latency.
Approach: They propose a plug-in algorithm for non-autoregressive translation for this problem . they propose ACT to familiarize the model with the source-side context of constraints .
Outcome: The proposed model improves over the backbone constrained NAT model in constraint preservation and translation quality, especially for rare constraints.
AHA: Aligning Large Audio-Language Models for Reasoning Hallucinations via Counterfactual Hard Negatives (2026.findings-acl)

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Challenge: Large Audio-Language Models suffer from hallucinations, e.g., generating text not grounded in the audio input.
Approach: They propose a framework to address hallucination problems in large audio-language models . they use a preference dataset to test the model's accuracy .
Outcome: The proposed model outperforms the latest SOTA methods in terms of performance and generalization.
Rejection-to-Acceptance Transition: Model Editing-Based Jailbreak Backdoor Injection Not Limited to Few Output Tokens (2026.findings-acl)

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Challenge: Existing methods for jailbreaking LLMs are implemented by binding backdoors to predefined phrases as first few output tokens, inducing the LLM’s next-token prediction to produce continuous responses.
Approach: They propose a model editing-based jailbreak backdoor attack that hijacks LLM representations into a acceptance domain rather than binding to a few output tokens.
Outcome: The proposed model editing method outperforms existing methods, showing stronger jailbreak capabilities across LLMs and datasets.
Multi-Defendant Legal Judgment Prediction via Hierarchical Reasoning (2023.findings-emnlp)

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Challenge: Existing methods for predicting judgment results for multiple defendants are ineffective.
Approach: They propose a method to predict the judgment results for each defendant in multi-defendant cases . they formalize the multi-diffendant judgment process as hierarchical reasoning chains .
Outcome: The proposed method can predict the judgment results for multiple defendants in multi-defendant cases.
Toward Consistent World Models with Multi-Token Prediction and Latent Semantic Enhancement (2026.acl-long)

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Challenge: Existing methods to learn internal world models rely on one-step supervision . however, standard MTP suffers from structural hallucinations .
Approach: They propose a method which anchors predictions to ground-truth hidden state trajectories.
Outcome: The proposed method bridges the gap between discrete tokens and continuous state representations, reducing structural hallucinations, and improving robustness to perturbations.
Quantifying Similarity between Relations with Fact Distribution (P19-1)

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Challenge: a conceptually simple and effective method to quantify the similarity between relations is presented . identifying relations is a crucial problem for several information extraction tasks.
Approach: They propose a method to quantify the similarity between relations in knowledge bases . they use a neural network to parameterize conditional probability distributions over entity pairs .
Outcome: The proposed method significantly correlates with human judgments, the authors show . it could be incorporated into negative sampling and softmax classification to alleviate these mistakes.
FCGCL: Fine- and Coarse-Granularity Contrastive Learning for Speech Translation (2022.findings-emnlp)

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Challenge: Existing methods to perform implicit knowledge transfer from machine translation to ST model are difficult because of the task complexity and data scarcity.
Approach: They recommend a method which conducts explicit knowledge transfer from MT to ST model by fine and coarse granularity contrastive learning.
Outcome: The proposed method improves the performance of the end-to-end speech translation model on all 8 languages.
Self-Critique Guided Iterative Reasoning for Multi-hop Question Answering (2025.findings-acl)

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Challenge: Large language models (LLMs) have demonstrated remarkable reasoning capabilities, but they still face challenges in knowledge-intensive multi-hop reasoning.
Approach: They propose a method that uses self-critique feedback to guide iterative reasoning by enabling iteration and self-evaluation of its intermediate reasoning steps.
Outcome: The proposed method surpasses the previous SOTA by 8.6% on three multi-hop reasoning datasets.
MoSEs: Uncertainty-Aware AI-Generated Text Detection via Mixture of Stylistics Experts with Conditional Thresholds (2025.emnlp-main)

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Challenge: Existing methods neglect stylistic modeling and rely on static thresholds, which greatly limits the detection performance.
Approach: They propose a framework that enables stylistics-aware uncertainty quantification through conditional threshold estimation.
Outcome: The proposed framework achieves an average improvement 11.34% in detection performance compared to baselines.
Understanding Programs by Exploiting (Fuzzing) Test Cases (2023.findings-acl)

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Challenge: Semantic understanding of programs has attracted great attention in the community . large language models (LLMs) are capable of learning contextual information from data at scale .
Approach: They propose to incorporate a relationship between inputs and possible outputs into learning for achieving a deeper semantic understanding of programs.
Outcome: The proposed method outperforms current state-of-the-art on two programming tasks and outperformed current state of the art by large margins.
Label Words are Anchors: An Information Flow Perspective for Understanding In-Context Learning (2023.emnlp-main)

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Challenge: In-context learning (ICL) is a promising capability for large language models (LLMs) but its underlying mechanism remains unexplored.
Approach: They propose a demonstration compression technique to expedite inference and an analysis framework for diagnosing ICL errors in GPT2-XL.
Outcome: The proposed method improves ICL performance and expedites inference.
CCHall: A Novel Benchmark for Joint Cross-Lingual and Cross-Modal Hallucinations Detection in Large Language Models (2025.acl-long)

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Challenge: Existing studies on hallucinations in large language models are limited to a single scenario, either cross-lingual or cross-modal.
Approach: They propose a joint Cross-lingual and Cross-modal hallucinations benchmark to fill this gap . they incorporate cross-lingual, cross-modal scenarios to assess hallucinic capabilities .
Outcome: The proposed benchmark incorporates both cross-lingual and cross-modal hallucination scenarios to assess the cross-linguistic and crossmodal capabilities of LLMs.
DRA-GRPO: Your GRPO Needs to Know Diverse Reasoning Paths for Mathematical Reasoning (2026.findings-acl)

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Challenge: Existing methods for group-relative policy optimization rely on scalar correctness rewards that are often non-injective with respect to semantic content.
Approach: They propose a framework that calibrates the reward signal using the semantic density of sampled groups.
Outcome: The proposed framework outperforms strong baselines on five math benchmarks with 7,000 samples and 55 cost.
Taming Text-to-Image Synthesis for Novices: User-centric Prompt Generation via Multi-turn Guidance (2025.emnlp-main)

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Challenge: Existing solutions for text-to-image synthesis are sensitive on textual prompts, posing a challenge for novice users.
Approach: They propose a dialogue-based TIS prompt generation model that emphasizes user experience for novice users.
Outcome: The proposed model emphasizes user experience for novice users . it improves user-centricity score while maintaining a competitive quality of synthesized images.
Enhanced Multi-Channel Graph Convolutional Network for Aspect Sentiment Triplet Extraction (2022.acl-long)

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Challenge: Existing methods to extract aspect triplets ignore the relationships between words . Enhanced Multi-Channel Graph Convolutional Network model can be used to learn relation-aware node representations.
Approach: They propose an Enhanced Multi-Channel Graph Convolutional Network model to fully utilize the relations between words for ASTE task.
Outcome: The proposed model outperforms state-of-the-art methods significantly on a benchmark dataset.
Do Vision-Language Models Have Internal World Models? Towards an Atomic Evaluation (2025.findings-acl)

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Challenge: Recent studies have evaluated and shown limitations in specific capabilities such as visual understanding, but a systematic evaluation of VLMs’ fundamental WM abilities remains absent.
Approach: They propose a framework that assesses perception and prediction to provide an atomic evaluation of VLMs as WMs.
Outcome: The proposed framework assesses perception and prediction abilities on 15 latest VLMs and compares them to human-level models.
Tiny Scales, Great Challenges: The Limits of Multimodal LLMs in Scale Recognition (2026.acl-long)

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Challenge: Existing benchmarks focus on a single type of quantity or a specific format, lacking a comprehensive evaluation of scale recognition capabilities.
Approach: They propose a visual scale recognition benchmark built using images from COCO, Open Images, and Flickr to evaluate scale recognition capabilities of multimodal large language models.
Outcome: The proposed model achieves 42.60% accuracy, lower than the 97.40% of humans.
Better Zero-Shot Reasoning with Role-Play Prompting (2024.naacl-long)

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Challenge: Recent years have witnessed a paradigm shift in natural language processing, driven by large language models such as GPT-3, PaLM, and Llama.
Approach: They propose a strategy for role-play prompting and assess its performance under the zero-shot setting.
Outcome: The proposed method outperforms the standard zero-shot prompting approach across 12 reasoning benchmarks.
Rethinking Entropy Interventions in RLVR: An Entropy Change Perspective (2026.acl-long)

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Challenge: Large Language Models (LLMs) have remarkable reasoning capabilities in complex tasks such as mathematics and coding.
Approach: They propose an entropy-modulation method that adaptively reweighs tokens based on theoretically-estimated entropic variations.
Outcome: The proposed method outperforms state-of-the-art methods in six mathematical reasoning and three coding benchmarks.
NesTools: A Dataset for Evaluating Nested Tool Learning Abilities of Large Language Models (2025.coling-main)

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Challenge: Existing benchmarks on nested tool learning are lacking relevant data instances.
Approach: They propose a method to construct large-scale nested tool calls with different nesting structures using a large-quality dataset.
Outcome: The proposed method can be used to evaluate the nested tool learning abilities of large language models (LLMs) in real-world applications.
Long Context is Not Long at All: A Prospector of Long-Dependency Data for Large Language Models (2024.acl-long)

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Challenge: Long-context modeling capabilities are important for large language models (LLMs) however, training LLMs with long context windows is insufficient since some samples do not exhibit strong semantic dependencies across long contexts.
Approach: They propose a data mining framework ProLong that assigns each training sample with a long dependency score and ranks and filters them according to their results.
Outcome: The proposed framework can rank and filter training samples that exhibit more powerful long-context modeling abilities.
Making Every Step Effective: Jailbreaking Large Vision-Language Models Through Hierarchical KV Equalization (2025.findings-emnlp)

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Challenge: HKVE selectively accepts gradient optimization results based on the distribution of attention scores across different layers, ensuring that every optimization step positively contributes to the attack.
Approach: They propose a framework that selectively accepts gradient optimization results based on the distribution of attention scores across different layers and selectively takes them into account when calculating the attack success rate.
Outcome: The proposed framework outperforms existing methods by achieving success rates of 75.08% on MiniGPT4, 85.84% on LLaVA and 81.00% on Qwen-VL.
GeoPQA: Bridging the Visual Perception Gap in MLLMs for Geometric Reasoning (2025.findings-emnlp)

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Challenge: Recent advances in reinforcement learning (RL) have enhanced the reasoning abilities of large language models, but the impact on multimodal LLMs is limited.
Approach: They propose a two-stage RL framework that enhances visual perception and fosters reasoning capabilities.
Outcome: The proposed framework improves geometric reasoning by 9.7% and problem-solving by 9.1% compared to direct reasoning training approach.
Complex Event Schema Induction with Knowledge-Enriched Diffusion Model (2023.findings-emnlp)

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Challenge: Existing studies on event schema induction have been hindered by errors and data quality issues.
Approach: They propose a knowledge-enriched discrete diffusion model that distills event scenario knowledge from LLMs.
Outcome: The proposed model achieves outstanding performance across evaluation metrics.
Infinite Babble: Inflating 3D Vision-Language Model Inference Overhead via Adversarial Geometric Perturbation (2026.findings-acl)

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Challenge: 3D Vision-Language Models (VLMs) are critical cognitive backbone for spatial intelligence, but their reliance on autoregressive decoding introduces a fundamental vulnerability regarding inference efficiency.
Approach: They propose a framework that triggers computational and economic exhaustion in 3D-VLMs by injecting imperceptible noise that forces the model into a state of pathological verbosity.
Outcome: The proposed framework amplifies output length and energy consumption by up to 6.45, demonstrating a potent capability to drain system resources.
latent-GLAT: Glancing at Latent Variables for Parallel Text Generation (2022.acl-long)

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Challenge: Recent advances in text generation have limited applications due to multimodality problem.
Approach: They propose a method which uses latent variables to capture word categorical information and invoke an advanced curriculum learning technique to overcome multi-modality problem.
Outcome: The proposed method outperforms strong baselines without an autoregressive model, which further broadens the application scenarios of the parallel decoding paradigm.
BalanceSFT: Improving LLM Function Calling with Balanced Training Signals and Data Hardness (2026.findings-acl)

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Challenge: Currently, Supervised Fine-Tuning (SFT) is the prevailing method for equipping Large Language Models (LLMs) with function calling capabilities, but its effectiveness is often compromised by two challenges: 1) lengthy Chain-of-Thought (CoT) reasoning tokens dominate training signals over concise function calls in the learning objective; 2) scarcity of hard training examples.
Approach: They propose a framework that uses a self-adjusted signal balancing loss and a hard data re-sampling strategy to selectively generate new, high-quality complex data guided by model errors.
Outcome: The proposed framework surpasses state-of-the-art models like GPT-5 in function calling performance.
Tree-CoT-RT: An Explainable Multi-Path Tree-Guided Chain-of-Thought and Reinforcement Learning Framework for Aspect Sentiment Quad Prediction (2026.findings-acl)

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Challenge: Existing methods lack explainability and generalization, making it difficult to justify inference decisions and detect implicit sentiment across domains and varied expression patterns.
Approach: They propose an explainable multi-path tree-guided chain-of-thought framework specifically designed for ASQP.
Outcome: Experiments on benchmark datasets show that Tree-CoT-RT outperforms baselines.
MTR: A Dataset Fusing Inductive, Deductive, and Defeasible Reasoning (2023.findings-acl)

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Challenge: Existing datasets for logical reasoning focus on monotonic logic and a single form of reasoning.
Approach: They propose to use a dataset to study the human-like reasoning in machine reading comprehension.
Outcome: The proposed dataset shows that state-of-the-art neural models perform noticeably worse than expected.
MEFT: Memory-Efficient Fine-Tuning through Sparse Adapter (2024.acl-long)

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Challenge: Parameter-Efficient Fine-tuning (PEFT) methods are limited on knowledge-intensive tasks due to the limited number of trainable parameters.
Approach: They propose a mechanism that fine-tunes Large Language Models with larger adapters . they store and update the parameters of larger adapter adapters on the CPU .
Outcome: The proposed method achieves comparable results to those obtained with larger memory capacities over the limited bandwidth of PCI Express (PCIe).
AceGPT, Localizing Large Language Models in Arabic (2024.naacl-long)

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Challenge: Significant concerns emerge when addressing cultural sensitivity and local values.
Approach: They propose a localized Large Language Model (LLM) specifically for Arabic, a language imbued with unique cultural characteristics inadequately addressed by current mainstream models.
Outcome: The proposed model sets the state-of-the-art standard for open Arabic LLMs across various benchmarks.
MetaMixSpeech: Meta Task Augmentation for Low-Resource Speech Recognition (2025.findings-emnlp)

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Challenge: Meta-learning has proven to be a powerful paradigm for improving speech recognition performance . however, multilingual meta learning also faces challenges such as task overfitting and learner overfit .
Approach: a new method is proposed to augment meta-training tasks with "more data" the method incorporates both support and query augmentations .
Outcome: The proposed method achieves a 6.35% improvement in the word error rate on FLEURS and Common Voice datasets.
SEA: Low-Resource Safety Alignment for Multimodal Large Language Models via Synthetic Embeddings (2025.acl-long)

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Challenge: Existing low-resource security alignment methods struggle with the security risks posed by additional modalities.
Approach: They propose to use multimodal datasets to enhance safety alignment but it is costly to construct these datasets.
Outcome: Experiments on image, video, and audio-based MLLMs show that the proposed method can synthesize a high-quality embedding on a single RTX3090 GPU within 24 seconds.
Meta-Adapter for Self-Supervised Speech Models: A Solution to Low-Resource Speech Recognition Challenges (2024.lrec-main)

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Challenge: Existing self-supervised learning models can learn latent representations from large amounts of unlabeled data, but they are expensive to fine-tune.
Approach: They develop a meta-adapter to obtain meta-initialized parameters for self-supervised models . meta-Adapters show better generalization and extensibility than traditional pretraining methods .
Outcome: Experiments on common voice and FLEURS datasets show Meta-Adapter performs better on low-resource languages . authors show it can be used on 12 low-source languages, but it requires huge computational resources .
Enhancing Explainable Rating Prediction through Annotated Macro Concepts (2024.acl-long)

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Challenge: Existing models learn user and item embeddings and generate reasons based on these embedds.
Approach: They propose a concept-based explanation framework that leverages macro concepts to bridge the gap between the user/item embeddings and the recommendation reasons.
Outcome: Extensive experiments on three datasets prove the proposed model is superior to existing models.
Cognitive Policy-Driven LLM for Diagnosis and Intervention of Cognitive Distortions in Emotional Support Conversation (2026.acl-long)

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Challenge: Existing models for ESC ignore cognitive distortions in help-seekers' expressions . current models provide basic emotional comfort, rather than helping help- seekers address psychological distress at a deeper cognitive level.
Approach: They propose a Large Language Model framework to enhance LLMs' ability to diagnose and intervene cognitive distortions in help-seekers.
Outcome: The proposed framework outperforms 15 state-of-the-art baselines in terms of distortion diagnosis accuracy, intervention strategy effectiveness, and safety risk control.
Combining the Best of Both Worlds: A Method for Hybrid NMT and LLM Translation (2025.findings-acl)

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Challenge: Large language models have advantages over neural machine translation systems, but they suffer from high computational costs and significant latency.
Approach: They propose a scheduling policy that optimizes translation result while ensuring fast speed and as little LLM usage as possible.
Outcome: The proposed model achieves optimal translation performance with less LLM usage on multilingual test sets.
Rich Semantic Knowledge Enhanced Large Language Models for Few-shot Chinese Spell Checking (2024.findings-acl)

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Challenge: Chinese Spell Checking (CSC) is a widely used technology for speech to text and optical character recognition.
Approach: They propose to use Chinese rich semantic information to introduce large language models as the foundation model.
Outcome: The proposed framework performs better on few-shot CSC task than existing methods.
Joint Alignment of Multi-Task Feature and Label Spaces for Emotion Cause Pair Extraction (2022.coling-1)

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Challenge: Existing methods for ECPE fail to model specific features and interactive features in between, or suffer from inconsistency of label prediction.
Approach: They propose to align ECPE with a feature-task alignment mechanism to model emotion-&cause-specific features and the shared interactive feature.
Outcome: The proposed model outperforms existing systems on all ECA subtasks.
Task-Level Thinking Steps Help Large Language Models for Challenging Classification Task (2023.emnlp-main)

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Challenge: Experimental results prove the superiority of our proposed method on challenging classification tasks.
Approach: They propose a task-level thinking step that eliminates bias introduced by demonstrations . they propose 'progressive revision framework' which can improve the thinking steps by correcting hard demonstrations.
Outcome: The proposed method achieves best performance on three kinds of classification tasks in zero-shot and few-shot settings.
Can Large Language Models Translate Spoken-Only Languages through International Phonetic Transcription? (2025.emnlp-main)

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Challenge: Existing research on spoken-only languages has focused on low-resource languages . spoken- only languages are among the most vulnerable to extinction .
Approach: They propose a unified language understanding framework that learns to translate spoken-only languages via in-context learning.
Outcome: The proposed framework can translate spoken-only languages into high-resource languages using phonetic transcription and automatic dictionary construction and knowledge retrieval.
The Program Testing Ability of Large Language Models for Code (2024.emnlp-industry)

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Challenge: Recent development of large language models (LLMs) for code shows promise in achieving code intelligence.
Approach: They explore the ability of large language models to generate automated test cases . they show +11.77% and +4.22% higher code pass rates on HumanEval+ .
Outcome: The proposed models show higher pass rates on humanEval+ compared with the current state-of-the-art models.
Apertus: Democratizing Open and Compliant LLMs for Global Language Environments (2026.acl-long)

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Alejandro Hernández-Cano, Alexander Hägele, Allen Hao Huang, Angelika Romanou, Antoni-Joan Solergibert, Barna Pásztor, Bettina Messmer, Dhia Garbaya, Eduard Frank Ďurech, Ido Hakimi, Juan Garcia Giraldo, Mete Ismayilzada, Negar Foroutan, Skander Moalla, Tiancheng Chen, Vinko Sabolčec, Yixuan Xu, Michael Aerni, Badr AlKhamissi, Inés Altemir Marinas, Mohammad Hossein Amani, Matin Ansaripour, Ilia Badanin, Harold Benoit, Emanuela Boros, Nicholas John Browning, Fabian Bösch, Maximilian Böther, Niklas Canova, Camille Challier, Clément Charmillot, Jonathan Coles, Jan Milan Deriu, Arnout Devos, Lukas Drescher, Daniil Dzenhaliou, Maud Ehrmann, Dongyang Fan, Simin Fan, Silin Gao, Miguel Gila, María Grandury, Diba Hashemi, Alexander Miserlis Hoyle, Jiaming Jiang, Mark Klein, Andrei Kucharavy, Anastasiia Kucherenko, Frederike Lübeck, Roman Machacek, Theofilos Ioannis Manitaras, Andreas Marfurt, Kyle Matoba, Simon Matrenok, Henrique Mendonça, Fawzi Roberto Mohamed, Syrielle Montariol, Luca Mouchel, Sven Najem-Meyer, Jingwei Ni, Gennaro Oliva, Matteo Pagliardini, Elia Palme, Andrei Panferov, Léo Paoletti, Marco Passerini, Ivan Pavlov, Auguste Poiroux, Kaustubh Ponkshe, Nathan Ranchin, Javier Rando, Mathieu Sauser, Jakhongir Saydaliev, Mukhammadali Sayfiddinov, Marian Schneider, Stefano Schuppli, Marco Scialanga, Andrei Semenov, Kumar Shridhar, Raghav Singhal, Anna Sotnikova, Alexander Sternfeld, Ayush Kumar Tarun, Paul Teiletche, Jannis Vamvas, Xiaozhe Yao, Hao Zhao, Alexander Ilic, Ana Klimovic, Andreas Krause, Caglar Gulcehre, David Rosenthal, Elliott Ash, Florian Tramèr, Joost VandeVondele, Livio Veraldi, Martin Rajman, Thomas C. Schulthess, Torsten Hoefler, Antoine Bosselut, Martin Jaggi, Imanol Schlag
Challenge: Apertus is a fully open suite of large language models (LLMs) designed to address responsibility shortcomings in today’s open model ecosystem, namely data responsibility and global representation.
Approach: They propose to release a fully open suite of large language models (LLMs) that address data responsibility and global representation shortcomings in today’s open model ecosystem.
Outcome: The proposed model is pretrained on openly available data and suppresses verbatim recall of data while retaining task performance.
MAPLE: Enhancing Review Generation with Multi-Aspect Prompt LEarning in Explainable Recommendation (2025.acl-long)

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Challenge: Existing models that generate generic aspects do not provide personalized informative recommendations.
Approach: They propose a model that integrates aspect category as another input dimension to facilitate memorizing fine-grained aspect terms.
Outcome: The proposed model outperforms baseline model on restaurant review datasets in the restaurant domain.
CAARMA: Class Augmentation with Adversarial Mixup Regularization (2025.findings-emnlp)

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Challenge: Speaker verification tasks require inference of unseen classes using specialized losses.
Approach: They propose a class augmentation framework that generates synthetic classes through data mixing in the embedding space.
Outcome: The proposed framework improves speaker verification tasks by 8% over baseline models.
Conditional Memory via Scalable Lookup: A New Axis of Sparsity for Large Language Models (2026.acl-long)

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Challenge: Mixture-of-Experts (MoE) scales capacity via conditional computation, but lacks knowledge lookup primitive.
Approach: They propose a conditional memory instantiated via Deep Sparse Embedding (DSE) they propose 'u-shaped scaling law' that identifies optimal balance between MoE experts and DSE memory .
Outcome: The proposed model outperforms an iso-parameter and isoFLOPs MoE baseline across knowledge and reasoning benchmarks and is infrastructure-efficient.
MRT: Multi-modal Short- and Long-range Temporal Convolutional Network for Time-sync Comment Video Behavior Prediction (2024.lrec-main)

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Challenge: Using time-sync comments, it is difficult to understand user behavior due to complexity of interactions between users, videos, and comments.
Approach: They propose a novel time-sync comment behavior prediction model that takes historical behavior into account and optimizes it on the basis of user preferences.
Outcome: The proposed model improves the performance of time-sync comments on visual frames and textual comments on two cats playing simultaneously.
War of Thoughts: Competition Stimulates Stronger Reasoning in Large Language Models (2025.findings-acl)

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Challenge: Recent advances in Large Language Models (LLMs) have reshaped the landscape of reasoning tasks.
Approach: They propose a method that enhances LLM reasoning without finetuning by using test-time scaling.
Outcome: The proposed method outperforms baseline models in both budget and model size.
Exploring the Choice Behavior of Large Language Models (2025.findings-acl)

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Challenge: Large Language Models (LLMs) are increasingly being adopted across various domains where they help to make choices.
Approach: They construct a virtual QA platform that includes three different experimental conditions, with four models from GPT and Llama series participating in repeated experiments.
Outcome: The proposed model includes three experimental conditions and four models from GPT and Llama series.
Making RALM Robust to Irrelevant Contexts via Layer Knowledge Guided Attention (2025.findings-acl)

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Challenge: Large language models (LLMs) face factual hallucination and knowledge obsolescence when tackling knowledge-intensive tasks.
Approach: They propose a layer-knowledge guided attention method which harnesses the layer-wise knowledge of large language models to optimize per-layer attention on useful passages.
Outcome: The proposed method outperforms existing methods on RALM benchmarks.
LeTS: Learning to Think-and-Search via Process-and-Outcome Reward Hybridization (2025.emnlp-main)

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Challenge: Recent research focuses on integrating reasoning capabilities into the realm of retrieval-augmented generation (RAG) via outcome-supervised reinforcement learning (RL).
Approach: They propose a process-level reward module to mitigate the unawareness of intermediate reasoning steps in outcome-level supervision without additional annotation.
Outcome: The proposed framework can boost LLMs’ reasoning ability by integrating external knowledge sources through retrieval-augmented generation (RAG) The proposed model can mitigate the unawareness of intermediate reasoning steps in outcome-level supervision without additional annotation.
A Multi-answer Multi-task Framework for Real-world Machine Reading Comprehension (D18-1)

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Challenge: Existing models of machine reading comprehension (MRC) are based on cloze style questions or crowdworkers given a short passage from well-edited sources.
Approach: They propose a multi-answer multi-task framework that uses multiple reference answers for multiple questions.
Outcome: The proposed model increases the ROUGE-L score on the DuReader dataset from 44.18, the previous state-of-the-art, to 51.09 .
Content Fuzzing for Escaping Information Cocoons on Digital Social Media (2026.findings-acl)

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Challenge: Information cocoons restrict users’ exposure to posts with diverse viewpoints . social media platforms restrict the range of viewpoints that users encounter .
Approach: They propose a confidence-guided fuzzing framework that rewrites posts while preserving their human-interpreted intent and induces different machine-inferred stance labels.
Outcome: The proposed framework rewrites posts while preserving human-interpreted intent and induces different machine-inferred stance labels while maintaining semantic integrity with respect to the original content.
NUANCED: Natural Utterance Annotation for Nuanced Conversation with Estimated Distributions (2021.findings-emnlp)

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Challenge: Existing conversational systems are agent-centric, which assumes the user utterances will closely follow the system ontology.
Approach: They build a dataset that maps user preferences to an ontology and model user preferences as estimated distributions over the system ontologies.
Outcome: The proposed system can be used to push existing research from agent-centric to user-centric.
Self-supervised Preference Optimization: Enhance Your Language Model with Preference Degree Awareness (2024.findings-emnlp)

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Challenge: Recent studies have focused on replacing the reward model in Reinforcement Learning with Human Feedback (RLHF) methods for Large Language Models (LLMs).
Approach: They propose a self-supervised preference optimization framework that replaces the reward model with a preference loss and alignment loss to improve LLMs' ability to understand human preferences.
Outcome: The proposed framework can be integrated with existing preference optimization methods and significantly boost their performance.
Alleviating Performance Degradation Caused by Out-of-Distribution Issues in Embedding-Based Retrieval (2025.findings-emnlp)

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Challenge: Recent studies reveal query out-of-distribution issues degrading ANN performance . a distribution regularizer is introduced into the encoder training objective to encourage alignment between query and base embeddings.
Approach: They introduce a distribution regularizer into the encoder training objective to encourage alignment between query and base embeddings.
Outcome: The proposed method consistently improves retrieval performance across multiple datasets.
Prompt-based Connective Prediction Method for Fine-grained Implicit Discourse Relation Recognition (2022.findings-emnlp)

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Challenge: Existing methods to aid implicit discourse relation recognition (IDRR) lack explicit connectives and are difficult to implement on fine-grained IDRR.
Approach: They propose a Prompt-based Connective Prediction method that instructs large-scale pre-trained models to use knowledge relevant to discourse relation and utilizes strong correlation between connectives and discourse relation to help the model recognize implicit discourse relations.
Outcome: The proposed method surpasses the state-of-the-art model and achieves significant improvements on those fine-grained few-shot discourse relation classes.
Shallow Focus, Deep Fixes: Enhancing Shallow Layers Vision Attention Sinks to Alleviate Hallucination in LVLMs (2025.emnlp-main)

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Challenge: Multimodal large language models (MLLMs) demonstrate excellent abilities for understanding visual information, but the hallucination remains a challenging problem.
Approach: They propose a training-free approach to enhance vision attention sinks to facilitate convergence of the image token attention sink within shallow layers.
Outcome: The proposed approach improves the convergence of the image token attention sink within shallow layers and strengthens the layer’s focus on the image itself.
Improving Text Generation with Student-Forcing Optimal Transport (2020.emnlp-main)

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Challenge: Maximum likelihood estimation (MLE) is used to train models, but during testing, the model is conditioned on previously generated tokens, resulting in exposure bias.
Approach: They propose to use optimal transport to match the sequences generated in MLE and test modes to reduce exposure bias.
Outcome: The proposed method is validated on machine translation, text summarization, and text generation tasks.
HopRAG: Multi-Hop Reasoning for Logic-Aware Retrieval-Augmented Generation (2025.findings-acl)

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Challenge: Traditional retrieval systems focus on lexical or semantic similarity rather than logical relevance.
Approach: They propose a new RAG framework that augments retrieval with logical reasoning . hopRAG uses a retrieve-reason-prune mechanism to explore multi-hop neighbors .
Outcome: The proposed framework outperforms conventional retrieval systems and state-of-the-art benchmarks on multi-hop QA tasks.
Investigating Inference-time Scaling for Chain of Multi-modal Thought: A Preliminary Study (2025.findings-acl)

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Challenge: Inference-time scaling of chain-of-thought (CoT) has been demonstrated as a promising approach for addressing multi-modal reasoning tasks.
Approach: They propose to integrate visual and textual modalities within the reasoning process . they adopt a consistency-enhanced verifier to ensure effective guidance for both methods across different thought paradigms.
Outcome: The proposed method outperforms text-only reasoning on 10 tasks spanning diverse domains and requires higher token consumption for processing richer visual inputs.
LongTableBench: Benchmarking Long-Context Table Reasoning across Real-World Formats and Domains (2025.findings-emnlp)

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Challenge: Evaluating 52 LLMs reveals that only the strongest models maintain robust performance under increasing context lengths and format diversity.
Approach: They propose a benchmark for evaluating long-context reasoning over semi-structured tables across diverse formats, tasks, and domains.
Outcome: The proposed model outperforms compression-based approaches on tasks requiring semantic integration.
Rethinking and Improving Multi-task Learning for End-to-end Speech Translation (2023.emnlp-main)

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Challenge: auxiliary tasks are highly consistent with end-to-end speech translation (ST) but their effectiveness has not been thoroughly studied.
Approach: They propose an improved multi-task learning approach for the ST task that bridges the modal gap by mitigating the difference in length and representation.
Outcome: The proposed approach achieves state-of-the-art on the MuST-C dataset with 20.8% of training time required by the current SOTA method.
RevPRAG: Revealing Poisoning Attacks in Retrieval-Augmented Generation through LLM Activation Analysis (2025.findings-emnlp)

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Challenge: Retrieval-Augmented Generation (RAG) enriches the input to LLMs by retrieving information from the relevant knowledge database.
Approach: They propose to use a knowledge database to enrich the input of LLMs by retrieving information from the relevant knowledge database.
Outcome: The proposed approach can achieve 98% true positive rate while maintaining a false positive rate close to 1%.
EWEK-QA : Enhanced Web and Efficient Knowledge Graph Retrieval for Citation-based Question Answering Systems (2024.acl-long)

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Challenge: citation-based QA systems are suffering from two shortcomings . they usually rely only on web as a source of extracted knowledge and external knowledge sources can hamper the efficiency of the system.
Approach: They propose to use a web-based knowledge graph retrieval solution to enrich extracted knowledge fed to a citation-based QA system.
Outcome: The proposed model outperforms open-source state-of-the-art models in 7 quantitative and human evaluation tasks.
Revealing Procedural Reasoning Structures in Chain-of-Thought Training via Span-Level Gradient Organization (2026.acl-long)

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Challenge: Chain-of-Thought (CoT) prompts elicit multi-step reasoning, yet how reasoning related structure is expressed during training remains poorly understood.
Approach: They propose a framework that tracks span-level gradients during fine-tuning on reasoning benchmarks to understand how models develop structured, step-by-step reasoning capabilities.
Outcome: The proposed framework tracks span-level gradients during fine-tuning on reasoning benchmarks to understand how models develop structured, step-by-step reasoning capabilities.
A Survey on Foundation Language Models for Single-cell Biology (2025.acl-long)

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Challenge: Existing single-cell foundation language models are based on pre-trained and large language models.
Approach: They review the development of single-cell foundation language models . they discuss data tokenization strategies and pre-training paradigms .
Outcome: The proposed models have shown remarkable performance in a variety of single-cell data analysis tasks.
What Factors Influence LLMs’ Judgments? A Case Study on Question Answering (2024.lrec-main)

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Challenge: Existing studies indicate that Large Language Models perform at a level comparable to humans with advantages of speed and cost-effectiveness in different fields.
Approach: They propose to introduce four unexplored factors and a new dimension of question difficulty to provide a more comprehensive understanding of LLMs’ judgments across varying question intricacies.
Outcome: The proposed dimensions of question difficulty and answer quantity provide valuable insights into optimizing LLMs’ performance as judges.
EnsLM: Ensemble Language Model for Data Diversity by Semantic Clustering (2021.acl-long)

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Challenge: Existing studies have shown that data diversity affects the performance of LMs if we train a single LM over the entire dataset.
Approach: They propose an autoencoding topic model with a mixture prior to perform clustering for the data.
Outcome: The proposed model can learn knowledge from different samples while extracting cluster-specific features.
SOLAR-RL: Semi-Online Long-horizon Assignment Reinforcement Learning (2026.findings-acl)

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Challenge: Existing approaches to training GUI agents on dynamic tasks are based on SFT or Behavior Cloning.
Approach: They propose a framework that integrates global trajectory insights directly into offline learning . they reconstruct diverse rollout candidates from static data and detect first failure point .
Outcome: The proposed framework improves long-horizon task completion rates and robustness compared to baselines.
OpenRLHF: A Ray-based Easy-to-use, Scalable and High-performance RLHF Framework (2025.emnlp-demos)

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Challenge: Existing RLHF frameworks face inference bottlenecks and complexity barriers restricting their accessibility for newcomers.
Approach: They propose an open-source RLHF framework that can be used to train large language models.
Outcome: The proposed framework achieves superior training efficiency with speedups ranging from 1.22 to 1.68 across different model sizes compared to state-of-the-art frameworks, while requiring significantly fewer lines of code for implementation.
ZARA: Training-Free Motion Time-Series Reasoning via Evidence-Grounded LLM Agents (2026.acl-long)

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Challenge: Existing approaches to human activity recognition are constrained to fixed activity sets . lack of training-free adaptation to new behavior leads to hallucinations and weak grounding .
Approach: They propose a knowledge- and retrieval-augmented agentic framework for motion time-series reasoning in a training-free inference setting.
Outcome: The proposed framework generalizes robustly to unseen subjects and across datasets . it can be used to train-free inference in a training-free environment .
ERNIE-Layout: Layout Knowledge Enhanced Pre-training for Visually-rich Document Understanding (2022.findings-emnlp)

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Challenge: Existing methods for visually rich document understanding lack layout-centered knowledge . experimental results show that ERNIE-Layout improves layout awareness .
Approach: They propose a document pre-training solution with layout knowledge enhancement in the whole workflow to learn better representations that combine the features from text, layout, and image.
Outcome: The proposed model outperforms existing models on key downstream tasks.
When More Thinking Hurts: Overthinking in LLM Test-Time Compute Scaling (2026.findings-acl)

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Challenge: Existing research implicitly assumes that longer thinking leads to better results . a recent study suggests that test-time compute scaling is more effective than model scaling .
Approach: They challenge the assumption that longer thinking yields better results . they show that models exhibit overthinking and marginal returns diminish at higher budgets .
Outcome: The proposed framework reduces computation significantly while maintaining comparable accuracy.
Evaluating Personalized Tool-Augmented LLMs from the Perspectives of Personalization and Proactivity (2025.acl-long)

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Challenge: Personalized tool utilization is essential for aligning large language models (LLMs) with user preference in interaction scenarios with various tools.
Approach: They propose a key-point-based LLM evaluation method that mitigates biases by manually annotating key points for each test case and providing them to LLM as the reference.
Outcome: The proposed method mitigates biases in the LLM-as-a-judge system by manually annotating key points for each test case and providing them to LLM as the reference.
Hyperlink-induced Pre-training for Passage Retrieval in Open-domain Question Answering (2022.acl-long)

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Challenge: Existing methods to train dense passage retrieval have a large data gap between upstream and downstream relevance.
Approach: They propose a method to pre-train the dense retriever with the text relevance induced by hyperlinks within Web documents.
Outcome: The proposed method outperforms existing methods under different scenarios and in the open-domain question answering domain.
MIRTH: Mutual-Information Reasoning with Temporal Hubs for Vision-Language-Action Agents (2026.acl-long)

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Challenge: a recent study shows that VLA models suffer from temporal myopia that discards historical dynamics and reasoning gaps between high-level instructions and low-level motor commands.
Approach: They propose a framework to address temporal myopia and autoregressive scalar decoding in VLAs . they propose two memory hubs that compress long-term scene evolution and short-term motion trends .
Outcome: The proposed framework achieves state-of-the-art performance and exhibiting emergent error recovery capabilities.
Alleviating Distribution Shift in Synthetic Data for Machine Translation Quality Estimation (2025.acl-long)

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Challenge: Quality Estimation (QE) models evaluate the quality of machine translations without reference translations, serving as the reward models for the translation task.
Approach: They propose a framework for alleviating distribution shift in synthetic QE data . they employ a constrained beam search algorithm and distinct generation models to enhance translation diversity.
Outcome: The proposed framework outperforms SOTA baselines like CometKiwi in supervised and unsupervised settings.
JumpCoder: Go Beyond Autoregressive Coder via Online Modification (2024.acl-long)

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Challenge: Existing code large language models lack reversibility and autoregressive sequential generation is incapable of correcting previous missing statements as humans do.
Approach: They propose a model-agnostic framework that enables human-like online modification and non-sequential generation to augment code large language models.
Outcome: The proposed framework enables human-like modification and non-sequential generation to augment code large language models.
CYCLE-INSTRUCT: Fully Seed-Free Instruction Tuning via Dual Self-Training and Cycle Consistency (2025.emnlp-main)

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Challenge: Existing methods for instruction tuning rely on expensive human-annotated seed data or powerful external teacher models.
Approach: They propose a framework that achieves fully seed-free instruction tuning by employing a dual self-training loop where two models are bootstrapped solely from raw, unlabeled text.
Outcome: The proposed framework outperforms seed-driven back-translation baselines and achieves comparable performance to strongly supervised methods.

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