Papers by Fei Wang

251 papers
Progra: Progress-Aware Reinforcement Learning for Multi-Turn Function Calling (2026.findings-acl)

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Challenge: Existing methods for multi-turn function calling are limited by redundancy and lack explicit integration of progress awareness into training.
Approach: They propose a framework that explicitly integrates progress awareness into LLM training for multi-turn function calling.
Outcome: Empirical results show that Progra outperforms existing methods on two public benchmarks.
Agentic Knowledgeable Self-awareness (2025.acl-long)

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Challenge: Large Language Models (LLMs) have achieved considerable performance across various agentic planning tasks.
Approach: They propose a data-centric approach that applies agents with knowledgeable self-awareness like humans to a heuristic situation judgement criterion to mark special tokens on their self-explored trajectories for collecting training data.
Outcome: The proposed paradigm outperforms baseline models on various tasks with minimal external knowledge.
Probing Structured Pruning on Multilingual Pre-trained Models: Settings, Algorithms, and Efficiency (2022.acl-long)

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Challenge: Structured pruning has been extensively studied on monolingual pre-trained models . but little attention has been paid to evaluating the effectiveness of structured pruning on multilingual models.
Approach: They investigate settings, algorithms, and efficiency of structured pruning on multilingual models . authors propose a simple approach that allows training the model once and adapting to different model sizes at inference .
Outcome: The proposed approach allows training the model once and adapting to different model sizes at inference.
Transductive Learning for Unsupervised Text Style Transfer (2021.emnlp-main)

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Challenge: Existing methods for style transfer are based on an inductive learning approach, which represents the style as embeddings, decoder parameters, or discriminator parameters and directly applies these general rules to the test cases.
Approach: They propose a retrieval-based context-aware style representation that involves top-K relevant sentences in the target style in the transfer process.
Outcome: The proposed method outperforms several strong baselines and is general and effective to the task of unsupervised style transfer.
Deceptive Semantic Shortcuts on Reasoning Chains: How Far Can Models Go without Hallucination? (2024.naacl-long)

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Challenge: Existing large language models (LLMs) suffer from hallucinations and unfaithful reasoning due to keyword/entity biases.
Approach: They propose a new probing method and benchmark to quantify this phenomenon by using a keyword/entity biases-based probing technique called EUREQA.
Outcome: The proposed method achieves 62% accuracy on multi-hop and complex QA benchmarks.
Improving Factual Consistency for Knowledge-Grounded Dialogue Systems via Knowledge Enhancement and Alignment (2023.findings-emnlp)

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Challenge: Experimental results show that pretrained language models generate inconsistent factual knowledge in many conversational tasks.
Approach: They propose a method which explicitly introduces extended feedforward networks (FFNs) in Transformers to enhance factual knowledge expressions given the specific patterns of knowledge-grounded dialogue inputs.
Outcome: The proposed methods improve the factual expression capability of feedforward networks (FFNs) in knowledge-grounded dialogue systems by knowledge enhancement and alignment respectively.
ReFSQL: A Retrieval-Augmentation Framework for Text-to-SQL Generation (2023.findings-emnlp)

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Challenge: Existing methods that align natural language with SQL Language underestimate inherent structural characteristics of SQL and lead to structure errors.
Approach: They propose a retrieval-argument framework that aligns natural language with SQL Language and trains one encoder-decoder-based model to fit all questions.
Outcome: The proposed framework improves accuracy and robustness of text-to-SQL generation on five datasets.
Improving Chinese Word Segmentation with Wordhood Memory Networks (2020.acl-main)

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Challenge: Contextual features are important in Chinese word segmentation (CWS) but it is difficult to integrate wordhood information into existing neural models.
Approach: They propose a neural framework that integrates contextual wordhood information with several popular encoder-decoder combinations for Chinese word segmentation.
Outcome: The proposed framework achieves state-of-the-art performance on five benchmark datasets.
Too Long, Do Re-weighting for Efficient LLM Reasoning Compression (2026.acl-long)

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Challenge: Large Language Models (LLMs) have recently achieved remarkable progress on complex reasoning tasks by leveraging extended Chain-of-Thought (CoT) techniques.
Approach: They propose a method that uses Extended Chain-of-Thought (EFT) to reduce the number of output tokens by nearly 40% while maintaining the accuracy of the reasoning.
Outcome: The proposed method reduces the number of output tokens by nearly 40% while maintaining the accuracy of the reasoning.
When Reasoning Meets Information Aggregation: A Case Study with Sports Narratives (2024.emnlp-main)

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Challenge: Using sports data, an LLM can analyze sports narratives to infer points from actions, identify related entities, attribute points accurately to players and teams, and draw conclusions.
Approach: They propose a method to synthesize NBA basketball game narratives using real NBA basketball data and propose 'SportsGen' they find that most models fail to accurately aggregate basketball scores due to frequent scoring patterns and open-source models suffer from significant score hallucinations.
Outcome: The proposed method can evaluate LLMs’ reasoning capabilities under complex scenarios with varying narrative lengths and density of information.
Model Composition for Multimodal Large Language Models (2024.acl-long)

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Challenge: Existing methods for creating versatile MLLMs rely on joint training with paired instruction data, which is resource-intensive and challenging to extend to new modalities.
Approach: They propose a new paradigm for multimodal large language models by reusing modality encoders and merging LLM parameters.
Outcome: The proposed model retains the modal understanding capabilities of each original model.
REALM: A Dataset of Real-World LLM Use Cases (2025.findings-acl)

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Challenge: Existing studies on LLM adoption and their social implications lack empirical grounding, weakening their validity.
Approach: They propose to integrate a dataset of over 94,000 LLM use cases collected from Reddit and news articles to provide insights into LLM adoption across different domains.
Outcome: The proposed dataset includes over 94,000 LLM use cases collected from Reddit and news articles.
EmpathyEar: An Open-source Avatar Multimodal Empathetic Chatbot (2024.acl-demos)

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Challenge: EmpathyEar is an open-source, avatar-based multimodal empathetic chatbot . currently, ERG systems rely on text, sound, and vision .
Approach: They propose an open-source, avatar-based multimodal empathetic chatbot to fill the gap in traditional text-only ERG systems.
Outcome: The proposed system enables users to generate emotional responses to user queries . it can also generate avatars with talking faces and synchronized speeches .
MolCA: Molecular Graph-Language Modeling with Cross-Modal Projector and Uni-Modal Adapter (2023.emnlp-main)

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Challenge: Language Models (LMs) have demonstrated impressive molecule understanding ability on 1D text-related tasks, but lack 2D graph perception, a critical ability of human professionals in comprehending molecules’ topological structures.
Approach: They propose to combine a cross-modal projector and a uni-modal adapter to enable an LM to understand both text- and graph-based molecular contents via a Q-Former.
Outcome: The proposed model outperforms the baselines on tasks such as molecule captioning, IUPAC name prediction, and molecule-text retrieval.
Mixture-of-Supernets: Improving Weight-Sharing Supernet Training with Architecture-Routed Mixture-of-Experts (2024.findings-acl)

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Challenge: Neural architecture search (NAS) uses weight-sharing supernets to generate diverse subnetworks without retraining.
Approach: They propose a weight-sharing supernet that leverages mixture-of-experts to enhance supernet model expressiveness with minimal training overhead.
Outcome: The proposed method achieves state-of-the-art (SoTA) performance in NAS for fast machine translation models, surpassing NAS-BERT and AutoDistil across various model sizes.
LLMs Assist NLP Researchers: Critique Paper (Meta-)Reviewing (2024.emnlp-main)

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Challenge: a comparative analysis of paper (meta-)reviews by large language models (LLMs) aims to identify and distinguish LLMs from human activities .
Approach: They present a comparative analysis to identify and distinguish LLM activities from human activities.
Outcome: The proposed analysis aims to improve recognition of instances when someone implicitly uses LLMs for reviewing activities.
Risk Minimization for Zero-shot Sequence Labeling (2021.acl-long)

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Challenge: Existing approaches to zero-shot sequence labeling are expensive and hard to obtain for lowresource languages/domains.
Approach: They propose a framework for zero-shot sequence labeling with minimum risk training and a decomposable risk function that models the relations between predicted labels from the source models and the true labels.
Outcome: The proposed framework outperforms state-of-the-art systems on 21 datasets.
Learning to Solve Domain-Specific Calculation Problems with Knowledge-Intensive Programs Generator (2025.naacl-long)

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Challenge: Domain Large Language Models (LLMs) are developed for domain-specific tasks based on general LLMs, but it still requires professional knowledge to facilitate the expertise for some domain- specific tasks.
Approach: They propose a pipeline to solve domain-specific calculation problems with KIPG . they use it to extract key variables and calculate outcomes dependent on domain knowledge .
Outcome: The proposed pipeline solves domain-specific calculation problems more effectively . it generates knowledge-intensive programs according to the domain- specific documents .
Stylized Knowledge-Grounded Dialogue Generation via Disentangled Template Rewriting (2022.naacl-main)

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Challenge: Existing knowledge-grounded dialogue generation models only produce pedantic responses, which lacks emotion and attraction compared with the responses with polite style, positive and negative sentiments.
Approach: They propose a method which generates responses via combing disentangled style templates and content templates.
Outcome: The proposed method improves on evaluation metrics compared with state-of-the-art methods.
Format-Adapter: Improving Reasoning Capability of LLMs by Adapting Suitable Format (2026.findings-acl)

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Challenge: Prior work showed that multiple reasoning formats outperform a single format when generating multiple answers.
Approach: They propose a method to measure reasoning error when generating multiple answers . they propose 'formatadapter' which generates and selects suitable reasoning formats .
Outcome: The proposed method achieves a 4.3% performance improvement over previous works on math and commonsense reasoning tasks.
OVM, Outcome-supervised Value Models for Planning in Mathematical Reasoning (2024.findings-naacl)

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Challenge: Large language models (LLMs) struggle with maintaining accuracy throughout multiple reasoning steps, especially in mathematical reasoning where an error in earlier steps can propagate to subsequent ones and ultimately leading to an incorrect answer.
Approach: They propose an Outcome-supervised Value Model (OVM) that employs outcome supervision for training a value model, which prioritizes steps that lead to accurate conclusions.
Outcome: The proposed model performs better on two multi-step reasoning datasets, GSM8K and Game of 24.
A Unified Span-Based Approach for Opinion Mining with Syntactic Constituents (2021.naacl-main)

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Challenge: Existing methods for fine-grained opinion mining (OM) are based on span-based annotations, but they are not effective.
Approach: They propose a unified span-based approach for the end-to-end OM setting using syntactic constituents and multi-task learning to integrate them into the proposed model.
Outcome: The proposed approach achieves significant improvements over previous work on the MPQA 2.0 dataset and reduces the number of wrongly-predicted opinion expressions and roles.
DecipherPref: Analyzing Influential Factors in Human Preference Judgments via GPT-4 (2023.emnlp-main)

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Challenge: Human preference judgments are important in large language models to produce outputs that align with human values.
Approach: They conduct an in-depth examination of pairwise human judgments released by OpenAI . they find that most favored factors vary across tasks and genres .
Outcome: The proposed model reveals that most favored factors vary across tasks and genres . the findings have implications on the construction of balanced datasets in human preference evaluations - crucial step in shaping behavior of future LLMs.
LMTurk: Few-Shot Learners as Crowdsourcing Workers in a Language-Model-as-a-Service Framework (2022.findings-naacl)

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Challenge: Recent work shows that large-scale pretrained language models (PLMs) are effective few-shot learners.
Approach: They propose a method that treats few-shotlearners as crowdsourcing workers . they propose to use these workers to train models that solve a task well .
Outcome: The proposed approach treats few-shotlearners as crowdsourcing workers . the resulting annotations can be utilized to train models that solve the task well .
End-to-End Modeling via Information Tree for One-Shot Natural Language Spatial Video Grounding (2022.acl-long)

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Challenge: Existing methods for grounding video frames with dense annotations require enormous amount of human effort.
Approach: They propose to ground natural language in video frames with only one frame labeled . they propose an end-to-end model that eliminates interference of irrelevant frames .
Outcome: The proposed model can ground natural language in all video frames with only one frame labeled . the proposed model eliminates interference of irrelevant frames based on branch search and cropping techniques .
Data Advisor: Dynamic Data Curation for Safety Alignment of Large Language Models (2024.emnlp-main)

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Challenge: Recent studies have explored using LLMs for efficient data collection.
Approach: They propose a method that takes into account the characteristics of the desired dataset and monitors the status of the generated data.
Outcome: The proposed method improves safety and quality of three representative large language models against safety issues without sacrificing model utility.
Generating User-Engaging News Headlines (2023.acl-long)

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Challenge: Personalized news recommendation systems present the same headline to all users, making it difficult for them to understand the connection between their interests and the recommended article.
Approach: They propose a framework that incorporates user profiling to generate personalized headlines and a combination of automated and human evaluation methods to determine user preference for personalized headline generation.
Outcome: The proposed framework can generate personalized headlines that meet the needs of a diverse audience.
OptiCo: Adaptive Distributed Training Optimization via Collaborative Agent Reasoning (2026.acl-long)

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Challenge: Existing distributed training frameworks are plagued by over-reliance on prior profiling and poor generalization across models/hardware.
Approach: They propose a model-driven multi-agent framework that leverages Large Language Models to enable automatic and explainable distributed training strategy configuration.
Outcome: The proposed framework outperforms expert-designed training strategies within 20 iterations.
DevEval: A Manually-Annotated Code Generation Benchmark Aligned with Real-World Code Repositories (2024.findings-acl)

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Challenge: Existing benchmarks are poorly aligned with real-world code repositories and are insufficient to evaluate the coding abilities of Large Language Models (LLMs).
Approach: They propose a repository-level benchmark named DevEval to evaluate LLMs' coding abilities in real-world code repositories.
Outcome: The proposed benchmarks show that the LLMs perform better in real-world code repositories than existing benchmarks.
DeFine: Decision-Making with Analogical Reasoning over Factor Profiles (2025.findings-acl)

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Challenge: Large language models are ideal for decision-making, but they can be difficult to process when they are verbose and include repetition, hedging, and vagueness.
Approach: They propose a framework that constructs probabilistic factor profiles from complex scenarios and integrates them with analogical reasoning to guide LLMs in making decisions in new situations.
Outcome: The proposed framework separates the tasks of quantifying uncertainty and incorporating it into LLM decision-making.
T2I-FactualBench: Benchmarking the Factuality of Text-to-Image Models with Knowledge-Intensive Concepts (2025.acl-long)

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Challenge: Existing studies on text-to-image (T2I) models focus on text alignment, image quality, and object composition capabilities.
Approach: They propose a T2I-FactualBench benchmark to evaluate the factuality of knowledge-intensive concept generation.
Outcome: The proposed framework evaluates the factuality of knowledge-intensive concept generation tasks.
Data Interpreter: An LLM Agent for Data Science (2025.findings-acl)

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Challenge: Large Language Models (LLMs) excel in various domains but face challenges when applied to data science workflows due to their complex, multi-stage nature.
Approach: They propose a hierarchical graph-based agent that represents complexity and a progressive strategy for step-by-step verification, refinement, and consistent context management.
Outcome: The proposed agent surpasses state-of-the-art baselines on the MATH dataset and performs better on InfiAgent-DABench.
Enhancing Hyperbole and Metaphor Detection with Their Bidirectional Dynamic Interaction and Emotion Knowledge (2025.acl-long)

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Challenge: Existing methods for hyperbole and metaphor detection focus on superficial text features, ignoring the associations of hyperbola and metaphor . Existing frameworks focus on identifying superficial text, focusing on superficial features .
Approach: They propose an emotion-guided hyperbole and metaphor detection framework based on bidirectional dynamic interaction.
Outcome: The proposed framework outperforms baseline methods on four datasets.
Towards Unified Prompt Tuning for Few-shot Text Classification (2022.findings-emnlp)

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Challenge: Prompt-based fine-tuning has boosted performance of Pre-trained Language Models (PLMs) on few-shot text classification, but PLMs are unfamiliar with prompt-style expressions during pre-training, which limits the few- shot learning performance on downstream tasks.
Approach: They propose a framework for prompt-based fine-tuning that captures prompting semantics from non-target NLP datasets and propose 'Prompt-Options-Verbalizer' for joint prompt learning across different NLP tasks.
Outcome: Experiments show that the proposed framework outperforms state-of-the-art prompt-based fine-tuning frameworks on few-shot text classification tasks.
DALR: Dual-level Alignment Learning for Multimodal Sentence Representation Learning (2025.findings-acl)

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Challenge: Existing multimodal sentence representation learning methods focus on aligning images and text at a coarse level, resulting in cross-modal misalignment bias and intra-modal semantic divergence.
Approach: They propose a dual-level alignment learning framework for multimodal sentence representation learning that promotes cross-modal and intra-modal alignment.
Outcome: The proposed framework outperforms state-of-the-art methods on semantic textual similarity and transfer tasks on semantic similarity, ranking distillation and global intra-modal alignment learning.
Cognitive Overload: Jailbreaking Large Language Models with Overloaded Logical Thinking (2024.findings-naacl)

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Challenge: Large language models (LLMs) have demonstrated increasing power, but they also have vulnerabilities.
Approach: They propose a black-box attack that targets the cognitive structure and processes of large language models (LLMs) they propose defending cognitive overload attacks from three perspectives.
Outcome: The proposed attack is a black-box attack with no need for knowledge of model architecture or access to model weights.
ProtT3: Protein-to-Text Generation for Text-based Protein Understanding (2024.acl-long)

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Challenge: Language Models excel in understanding textual descriptions of proteins, but struggle to process texts.
Approach: They propose a framework for Protein-to-Text Generation for Text-based Protein Understanding that integrates a PLM as its protein understanding module.
Outcome: The proposed framework surpasses existing baselines and is highly efficient in protein-to-text generation.
Tailoring Diagnostic Modeling to Individual Learners: Personalized Distractor Generation via MCTS-Guided Reasoning Reconstruction (2026.acl-long)

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Challenge: Current distractor generation methods produce shared distractors for all students, ignoring individual variations in reasoning, which limits their diagnostic effectiveness.
Approach: They propose a method which tailors distractors to each student’s specific cognitive flaws, inferred from their past question-answering (QA) history.
Outcome: The proposed framework outperforms existing methods in generating plausible distractors and adapts to group-level settings.
Reformulating Domain Adaptation of Large Language Models as Adapt-Retrieve-Revise: A Case Study on Chinese Legal Domain (2024.findings-acl)

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Challenge: Recent large language models like GPT-4 have demonstrated astonishing zero-shot capabilities in general domain tasks, but they often generate content with hallucinations in specific domains such as Chinese law.
Approach: They propose a framework for adapting large language models (LLMs) to Chinese legal domains by reformulating generation as an adapt-retrieve-revise process.
Outcome: The proposed framework outperforms existing models in the Chinese legal domain by +33.6 points in the zero-shot setting.
Self-Error-Instruct: Generalizing from Errors for LLMs Mathematical Reasoning (2025.acl-long)

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Challenge: Existing approaches to learning from errors synthesize training data by extrapolating from isolated bad cases, thereby failing to generalize the extensive patterns inherent within these cases.
Approach: They propose a framework that synthesizes more generalized training data from isolated bad cases by extrapolating from isolated cases.
Outcome: The proposed framework synthesizes more generalized training data to address these model weaknesses.
Robust (Controlled) Table-to-Text Generation with Structure-Aware Equivariance Learning (2022.naacl-main)

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Challenge: Controlled table-to-text generation is a new approach to generate textual descriptions for highlighted subparts of a table.
Approach: They propose an equivariance learning framework which encodes tables with a structure-aware self-attention mechanism and a positional encoding mechanism to preserve relative position of tokens in the same cell.
Outcome: The proposed framework is free to be plugged into existing table-to-text generation models and has improved T5-based models to offer better performance on ToTTo and HiTab.
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.
Robust Tool Use via Fission-GRPO: Learning to Recover from Execution Errors (2026.acl-long)

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Challenge: Large language models (LLMs) can call tools effectively, but they remain brittle in multi-turn execution.
Approach: They propose a framework that converts execution errors into on-policy corrective supervision within the RL training loop.
Outcome: The proposed framework improves the error recovery rate of Qwen3-8B by 5.7% absolute and overall accuracy by 4.0% on BFCL v4 Multi-Turn.
Towards General Agentic Intelligence via Environment Scaling (2026.findings-acl)

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Challenge: Diverse real-world APIs require precise, robust function-calling intelligence, which needs agents to develop these capabilities through interaction in varied environments.
Approach: They propose a framework that scales up environments to enable agentic intelligence . they use a two-phase agent fine-tuning strategy to first endow agents with basic agentic capabilities, then specializing them for domain-specific contexts.
Outcome: Experiments on -bench, -Bench, and ACEBench show that the model significantly enhances the models’ function-calling capability.
MMEvol: Empowering Multimodal Large Language Models with Evol-Instruct (2025.findings-acl)

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Challenge: a new framework for image-text instruction data evolution improves MLLM performance . lack of high-quality instruction data remains a major bottleneck in ML modeling .
Approach: They propose a multimodal instruction data evolution framework that iteratively enhances data quality through fine-grained perception, cognitive reasoning, and interaction evolution.
Outcome: The proposed approach improves MLLM performance in nine vision-language tasks while using significantly less data.
ExploraCoder: Advancing Code Generation for Multiple Unseen APIs via Planning and Chained Exploration (2025.acl-long)

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Challenge: Large language models face intrinsic limitations in coding with unseen APIs in training corpora.
Approach: They propose a training-free framework that empowers LLMs to invoke multiple unseen APIs in code solution by planning a complex problem into several API invocation subtasks and experimenting with correct API usage at intermediate steps.
Outcome: The proposed framework significantly improves performance for models lacking prior API knowledge, achieving 11.99% over retrieval-based approaches and 17.28% over pretraining-based methods in pass@10.
Browse and Concentrate: Comprehending Multimodal Content via Prior-LLM Context Fusion (2024.acl-long)

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Challenge: Multimodal Large Language Models (MLLMs) lack understanding of multi-image and interleaved inputs due to the visual features encoded by frozen encoders before being fed into the LLM backbone.
Approach: They propose a two phase paradigm to enable in-depth multimodal context fusion prior to feeding the features into LLMs.
Outcome: The proposed paradigm boosts the performance on 7 multi-image scenarios, contributing to increments on average accuracy by 2.13% and 7.60% against strong MLLMs baselines with 3B and 11B LLMs, respectively.
Rethinking Depression Prediction from a Fine-Grained Subscore Modeling Perspective via Multi-Task Learning (2026.acl-long)

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Challenge: Existing methods for depression assessment rely on standardized ratings, but they are time-consuming and subject to inter-rater variability.
Approach: They propose a fine-grained model for subscore prediction via multi-task learning that can be used to predict depression severity using multiple tasks.
Outcome: The proposed model outperforms baselines and Qwen3-14B direct scoring on the public E-DAIC dataset and to a large-scale private clinical dataset.
Gold Panning in Vocabulary: An Adaptive Method for Vocabulary Expansion of Domain-Specific LLMs (2024.emnlp-main)

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Challenge: Large Language Models (LLMs) struggle when it comes to specialized domains due to limited domain-specific knowledge.
Approach: They propose an adaptive method that automatically identifies valuable words from a given domain vocabulary.
Outcome: The proposed method has been validated on three Chinese datasets and performed on general tasks.
PFDial: A Structured Dialogue Instruction Fine-tuning Method Based on UML Flowcharts (2025.findings-acl)

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Challenge: Large Language Models (LLMs) have shown remarkable progress in dialogue and reasoning, but they struggle to solve strictly constrained dialogue tasks.
Approach: They construct a dataset that contains 12,705 high-quality Chinese dialogue instructions from 440 flowcharts containing 5,055 process nodes.
Outcome: The proposed model outperforms GPT-4o models on backward transitions and outperformed GPT-42 models on the same dataset.
Mixture-of-Minds: Multi-Agent Reinforcement Learning for Table Understanding (2026.acl-long)

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Challenge: Large language models (LLMs) have shown promise on understanding and reasoning over tables, but current approaches remain limited.
Approach: They propose a multi-agent framework that decomposes table reasoning into three specialized roles: planning, coding, and answering.
Outcome: The proposed framework decomposes table reasoning into three specialized roles: planning, coding, and answering.
Memorization, Emergence, and Explaining Reversal Failures: A Controlled Study of Relational Semantics in LLMs (2026.acl-long)

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Challenge: Autoregressive LLMs perform well on relational tasks that require linking entities via relational words, but it is unclear whether they learn the logical semantics of such relations or whether left-to-right order bias is involved.
Approach: They propose a framework that generates text from symmetric/inverse triples and trains autoregressive models from scratch.
Outcome: The proposed framework generates text from symmetric/inverse triples, trains autoregressive models from scratch, and evaluates memorization, logical inference, and in-context generalization to unseen entities.
Word Reordering for Zero-shot Cross-lingual Structured Prediction (2021.emnlp-main)

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Challenge: Current sentence encoders are word order sensitive, resulting in poor performance . Adapting word order from one language to another is key in cross-lingual structured prediction.
Approach: They propose a new module to organize words following the source language order . they build structured prediction models with bag-of-words inputs and introduce a module to do this .
Outcome: The proposed model significantly improves target language performance for languages that are distant from the source language.
PALM: Pre-training an Autoencoding&Autoregressive Language Model for Context-conditioned Generation (2020.emnlp-main)

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Challenge: Existing techniques for natural language understanding and generation use autoencoding and/or autoregressive objectives to train models.
Approach: They propose a self-supervised pre-training scheme that pre-trains an autoencoding and autoregressive language model on a large unlabeled corpus for generating new text conditioned on context.
Outcome: The proposed scheme achieves state-of-the-art results on a variety of language generation benchmarks covering generative question answering, abstractive summarization and conversational response generation.
CBT-Bench: Evaluating Large Language Models on Assisting Cognitive Behavior Therapy (2025.naacl-long)

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Challenge: Existing research has explored mental health condition classifications, empathetic conversations, and chatbots designed for simple discourse structures.
Approach: They propose a benchmark for systematic evaluation of cognitive behavioral therapy assistance using Large Language Models (LLMs).
Outcome: The proposed benchmark includes three levels of tasks covering key aspects of cognitive behavioral therapy that could be enhanced through AI assistance.
Table-based Fact Verification With Salience-aware Learning (2021.findings-emnlp)

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Challenge: Existing methods for fact verification use tabular data with tokens, but training requires labeled training data.
Approach: They propose a system that identifies token-level salience in the statement with probing-based saliency estimation.
Outcome: The proposed system improves on TabFact benchmark by replacing non-salient terms with tokens.
A New Approach to Overgenerating and Scoring Abstractive Summaries (2021.naacl-main)

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Challenge: Abstractive summarization is a learning objective to produce system outputs that resemble reference summaries on a word-to-word basis.
Approach: They propose a two-staged strategy to generate multiple variants of the target summary and score and select admissible ones according to users’ needs.
Outcome: The proposed approach can achieve state-of-the-art on benchmark summarization datasets.
Instructions as Backdoors: Backdoor Vulnerabilities of Instruction Tuning for Large Language Models (2024.naacl-long)

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Challenge: et al., 2021) show that instruction models can be trained on crowdsourced datasets with task instructions to achieve superior performance.
Approach: They examine security concerns of emergent instruction tuning paradigm that models are trained on crowdsourced datasets with task instructions to achieve superior performance.
Outcome: The proposed model can achieve 90% success rate across four commonly used datasets.
Depth Growing for Neural Machine Translation (P19-1)

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Challenge: Neural machine translation models with tens and even more than a hundred blocks have shown effectiveness in image recognition.
Approach: They propose a two-stage approach with three specially designed components to construct deeper NMT models.
Outcome: The proposed approach improves on WMT14 EnglishGerman and EnglishFrench translation tasks.
A Causal View of Entity Bias in (Large) Language Models (2023.findings-emnlp)

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Challenge: Entity bias affects pretrained (large) language models, causing them to rely on (biased) parametric knowledge to make unfaithful predictions.
Approach: They propose a structured causal model whose parameters are easier to estimate . they propose to perturb the original entity with neighboring entities .
Outcome: The proposed model reduces biasing information pertaining to the original entity while still preserving sufficient semantic information from similar entities.
From Introspection to Best Practices: Principled Analysis of Demonstrations in Multimodal In-Context Learning (2025.naacl-long)

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Challenge: Motivated by in-context learning capabilities of Large Language Models (LLMs), multimodal LLMs with additional visual modality are also exhibited with similar ICL abilities when multiple image-text pairs are provided as demonstrations.
Approach: They conduct systematic and principled evaluation of multimodal ICL for models of different scales on a broad spectrum of new yet critical tasks.
Outcome: The proposed model performance improves on a broad spectrum of new yet critical tasks.
Knowledge Rumination for Pre-trained Language Models (2023.emnlp-main)

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Challenge: Existing studies have shown that pre-trained language models lack the capacity to handle knowledge-intensive tasks alone.
Approach: They propose a new paradigm to help pre-trained language models utilize latent knowledge without retrieving it from external corpus.
Outcome: The proposed paradigm can be applied to pre-trained language models without retrieving external knowledge from the corpus.
Focusing Condition: Inference-Time Self-Contrastive Steering Elicits Better Conditional Text Embeddings in LLMs (2026.acl-long)

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Challenge: Existing methods for extracting conditional text embeddings from large language models (LLMs) relying on prompts often fails to produce high-quality conditional embeddables, resulting in degradation of quality.
Approach: They propose a plug-and-play method that constructs unconditional general text embeddings and uses them to refine conditional text embeds.
Outcome: The proposed method improves performance of prompt-based methods on clustering, Semantic Textual Similarity, and triplet alignment datasets.
MEVTR: A Multilingual Model Enhanced with Visual Text Representations (2024.lrec-main)

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Challenge: Existing models that generate multilingual text representations perform poorly on low-resource languages due to lack of representation space and model capacity.
Approach: They propose a multilingual model enhanced with visual text representations which complements textual representations and extends multilingual representation space with visual representations.
Outcome: The proposed model outperforms state-of-the-art models on zero-shot cross-lingual transfer tasks without the target language adapter.
HiDe-LLaVA: Hierarchical Decoupling for Continual Instruction Tuning of Multimodal Large Language Model (2025.acl-long)

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Challenge: Existing methods to improve instructionfollowing performance of MLLMs often trade off memory efficiency for performance gains, compromising overall efficiency.
Approach: They propose a task-specific expansion and task-general fusion framework based on variations in Centered Kernel Alignment (CKA) similarity across different model layers when trained on diverse datasets.
Outcome: The proposed framework improves performance compared to existing benchmarks.
Modularized Interaction Network for Named Entity Recognition (2021.acl-long)

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Challenge: Named Entity Recognition (NER) models focus on word-level information, while segment-based models focus only on word level information.
Approach: They propose a Modularized Interaction Network (MIN) model which utilizes both word-level information and segment-level dependencies.
Outcome: The proposed model outperforms the current state-of-the-art models on three NER benchmark datasets.
How Should We Enhance the Safety of Large Reasoning Models: An Empirical Study (2026.acl-long)

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Challenge: Large Reasoning Models have achieved remarkable success on reasoning-intensive tasks, but their enhanced reasoning capabilities do not translate to improved safety performance.
Approach: They propose to use supervised fine tuning to enhance the safety of Large Reasoning Models.
Outcome: The proposed method improves the safety of large reasoning models on reasoning-intensive tasks.
MTLS: Making Texts into Linguistic Symbols (2024.emnlp-main)

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Challenge: In linguistics, all languages can be considered as symbolic systems . most work overlooks the properties of languages as symbol systems - aaron et al., 1989).
Approach: They propose a method to make texts into linguistic symbols to improve multilingual capability . they use a pre-training method to replace pre-trained language models with a vocabulary map .
Outcome: The proposed method improves multilingual capabilities on multilingual tasks using BERT and RoBERTa as the backbone.
Large Language Models as Source Planner for Personalized Knowledge-grounded Dialogues (2023.findings-emnlp)

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Challenge: Existing knowledge-grounded dialogue systems focus on a single knowledge source or ignore the dependency between multiple knowledge sources.
Approach: They propose a framework that integrates multiple knowledge sources and dependencies between them.
Outcome: The proposed framework can produce persona-consistent and knowledge-enhanced responses on a knowledge-grounded dialogue dataset.
MetaScale: Test-Time Scaling with Evolving Meta-Thoughts (2026.findings-acl)

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Challenge: Existing approaches impose fixed cognitive structures that enhance performance in specific tasks but lack adaptability across diverse scenarios.
Approach: They propose a test-time scaling framework based on meta-thoughts to improve performance . meta-thinkts are adaptive thinking strategies tailored to a given task .
Outcome: Experimental results show that MetaScale outperforms standard inference approaches . it can scale more effectively with increasing sampling budgets and produces more structured responses .
Modeling Complex Dialogue Mappings via Sentence Semantic Segmentation Guided Conditional Variational Auto-Encoder (2022.findings-emnlp)

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Challenge: Existing efforts to identify and avoid CDM to facilitate dialogue learning failed to solve the problem.
Approach: They propose a Sentence Semantic Segmentation guided Conditional Variational Auto-Encoder which can model and take advantage of the CDM data.
Outcome: The proposed method can model and take advantages of the CDM data.
Reward Difference Optimization For Sample Reweighting In Offline RLHF (2024.findings-emnlp)

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Challenge: Large Language Models (LLMs) are becoming more capable, but their maximum likelihood objective for the next token prediction falls short in capturing such crucial human values.
Approach: They propose a reward difference prediction method that uses reward difference coefficients to reweigh sample pairs in offline RLHF and a difference model that considers rich interactions between a pair of responses.
Outcome: The proposed method is effective in both automatic metrics and human evaluation.
Constructing Highly Inductive Contexts for Dialogue Safety through Controllable Reverse Generation (2022.findings-emnlp)

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Challenge: Existing methods to detect toxic generation of pretrained language models rely on templates, data extraction, crowdsourcing workers or automatic generation.
Approach: They propose a method to construct adversarial contexts conditioned on a given response . they augment existing dataset BAD+ and construct a new dataset B AD+ .
Outcome: The proposed method can detect toxic or biased content in large pretrained language models.
DecompEval: Evaluating Generated Texts as Unsupervised Decomposed Question Answering (2023.acl-long)

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Challenge: Existing evaluation metrics for natural language generation (NLG) tasks face the challenges on generalization ability and interpretability.
Approach: They propose a metric that evaluates natural language generation tasks as an instruction-style question answering task and utilizes instruction-tuned pre-trained language models without training on evaluation datasets.
Outcome: The proposed metric achieves state-of-the-art performance in untrained metrics for evaluating text summarization and dialogue generation, which exhibits strong dimension-level / task-level generalization ability and interpretability.
DualRAG: A Dual-Process Approach to Integrate Reasoning and Retrieval for Multi-Hop Question Answering (2025.acl-long)

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Challenge: Existing approaches to multi-hop question answering struggle to identify and organize dynamic knowledge . et al., 2023; Liu e.t. al. 2023) suggest a dual-process framework for multi-step reasoning .
Approach: They propose a synergistic dual-process framework that integrates reasoning and retrieval.
Outcome: The proposed framework improves answer accuracy and coherence even in smaller-scale models.
One Cannot Stand for Everyone! Leveraging Multiple User Simulators to train Task-oriented Dialogue Systems (2023.acl-long)

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Challenge: Recent studies have found that Task-oriented Dialogue systems can be more suitable for human users.
Approach: They propose a framework to optimize ToD systems by leveraging Multiple User SimulaTors.
Outcome: The proposed framework improves performance on multiWOZ with human evaluations and automatic evaluations.
RealBench: A Chinese Multi-image Understanding Benchmark Close to Real-world Scenarios (2025.findings-emnlp)

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Challenge: RealBench is the first Chinese multimodal multi-image dataset . the dataset contains 9393 samples and 69910 images .
Approach: They propose to create a Chinese multimodal multi-image dataset using 21 models . they use closed-source models that support multi-inputs as well as open-source visual and video models a .
Outcome: The first Chinese multimodal multi-image dataset contains 9393 samples and 69910 images.
Memp: Exploring Agent Procedural Memory (2026.findings-acl)

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Challenge: Large Language Models (LLMs) based agents suffer from brittle procedural memory that is manually engineered or entangled in static parameters.
Approach: They propose a procedural-memory repository that distills past agent trajectories into fine-grained, step-by-step instructions and higher-level, script-like abstractions.
Outcome: The proposed repository can be used to improve agents' performance on travelplanner and Alfworld.
HuatuoGPT, Towards Taming Language Model to Be a Doctor (2023.findings-emnlp)

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Challenge: Experimental results show that the distilled language model outperforms its teacher model (ChatGPT) in most cases.
Approach: They propose a Large Language Model (LLM) that leverages both distilled data from **ChatGPT** and real-world data from**doctors** in the supervised fine-tuning stage.
Outcome: The proposed model outperforms the teacher model in most cases by using additional real-world data and RLMF to align the language model with the merits of both sources.
LoraRetriever: Input-Aware LoRA Retrieval and Composition for Mixed Tasks in the Wild (2024.findings-acl)

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Challenge: Low-Rank Adaptation (LoRA) is an effective yet efficient solution for fine-tuning large language models.
Approach: They propose a low-rank Adaptation framework that retrieves and composes multiple LoRAs according to input prompts.
Outcome: Experimental results show that LoraRetriever outperforms baselines in terms of performance and versatility.
ToolPRM: Fine-Grained Inference Scaling of Structured Outputs for Function Calling (2026.acl-long)

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Challenge: Existing research on inference scaling focuses on unstructured output generation tasks, such as mathematical problems.
Approach: They propose an inference-scaling framework that combines fine-grained beam search with ToolPRM, a process reward model scoring each intra-call decision.
Outcome: The proposed framework outperforms outcome and coarse-grained reward models in predictive accuracy and yields consistent test-time gains on multiple function-calling benchmarks.
BabyWalk: Going Farther in Vision-and-Language Navigation by Taking Baby Steps (2020.acl-main)

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Challenge: Existing state-of-the-art VLN agents do not generalize well for long navigation tasks.
Approach: They propose a VLN agent that is learned to navigate by decomposing long instructions into shorter ones and completing them sequentially.
Outcome: The proposed agent can follow long instructions better than existing ones, but it does not generalize well.
KBM: Delineating Knowledge Boundary for Adaptive Retrieval in Large Language Models (2025.findings-emnlp)

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Challenge: Retrieval-augmented generation (RAG) is employed to tackle these challenges . a Knowledge Boundary Model (KBM) is used to express the known/unknown of a given question .
Approach: They propose a Knowledge Boundary Model to express the known/unknown of a given question . they find that not all questions need to trigger RAG to improve performance .
Outcome: The proposed model reduces time and computational costs by retrieving parts of unknown knowledge . the proposed model can express the known/unknown of a given question and determine whether a RAG needs to be triggered .
Cue-CoT: Chain-of-thought Prompting for Responding to In-depth Dialogue Questions with LLMs (2023.findings-emnlp)

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Challenge: Existing LLMs generate responses based on the dialogue context, overlooking the underlying linguistic cues about the user status exhibited in the context.
Approach: They propose a linguistic cue-based chain-of-thoughts method which enhances the LLMs inference with an intermediate reasoning step to find cues exhibited in the dialogue.
Outcome: The proposed method outperforms standard prompting methods on in-depth dialogue questions and linguistic cues exhibited in the context.
Rescue: Ranking LLM Responses with Partial Ordering to Improve Response Generation (2024.acl-srw)

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Challenge: Customizing LLMs for a specific task involves separating high-quality responses from lower-quality ones. Obtaining a large volume of expert-annotated data is costly for most tasks.
Approach: They propose a method that trains the model to prioritize the best responses from a pool of candidates created for a task using ranking metrics.
Outcome: The proposed method is more robust, less sensitive to noise, and can be achieved with limited human annotations or through heuristic methods.
Outcome Accuracy is Not Enough: Aligning the Reasoning Process of Reward Models (2026.acl-long)

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Challenge: Recent studies observe a phenomenon where reward models achieve high accuracy on static datasets but fail to generalize effectively during RLHF.
Approach: They propose a method that combines rationale consistency with outcome accuracy to improve performance on RM-Bench and JudgeBench.
Outcome: The proposed method surpasses baselines on RM-Bench and JudgeBench by an average of 5% and improves creative writing tasks by 7%.
ClusterUCB: Efficient Gradient-Based Data Selection for Targeted Fine-Tuning of LLMs (2025.findings-emnlp)

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Challenge: Gradient-based data influence approximation is not feasible in practice.
Approach: They propose a gradient-based data selection framework with clustering and a modified Upper Confidence Bound algorithm to solve this problem.
Outcome: The proposed framework can achieve comparable results to the original gradient-based data selection methods while reducing computational consumption.
Universally Empowering Zeroth-Order Optimization via Adaptive Layer-wise Sampling (2026.findings-acl)

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Challenge: Existing methods for fine-tuning Large Language Models are slow and lack of performance.
Approach: They propose a Zeroth-Order optimization framework that uses forward passes to fine-tune Large Language Models.
Outcome: The proposed framework achieves 1.7 to 3.0 wall-clock acceleration on LLaMA and OPT models.
From Shortcuts to Triggers: Backdoor Defense with Denoised PoE (2024.naacl-long)

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Challenge: Existing backdoor defense methods focus on specific triggers, leaving a universal defense unexplored.
Approach: They propose an ensemble-based backdoor defense framework that denies backdoor attacks by capturing backdoor shortcuts and preventing learning them.
Outcome: The proposed framework significantly improves defense performance against backdoor attacks . it is also effective under a more challenging but practical setting .
Summarizing Medical Conversations via Identifying Important Utterances (2020.coling-main)

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Challenge: Applying natural language processing (NLP) techniques to the medical field is a prevailing trend nowadays and has great potential in many applications, such as key information extraction in medical literature.
Approach: They propose to use a hierarchical encoder-tagger model to generate medical conversation summarization by identifying important utterances.
Outcome: The proposed model outperforms baseline models and models and adds conversation-related features to improve performance.
Repulsive Attention: Rethinking Multi-head Attention as Bayesian Inference (2020.emnlp-main)

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Challenge: Existing studies show that multi-head attention is an effective module in deep neural networks, but there are no explicit mechanisms guaranteeing this property.
Approach: They propose a non-parametric approach that explicitly improves the repulsiveness in multi-head attention and consequently strengthens model’s expressiveness.
Outcome: The proposed approach improves the repulsiveness in multi-head attention and strengthens model’s expressiveness.
Improving Named Entity Recognition by External Context Retrieving and Cooperative Learning (2021.acl-long)

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Challenge: Recent work shows document-level contexts can significantly improve Named Entity Recognition models.
Approach: They propose to find external contexts of a sentence by retrieving and selecting a set of semantically relevant texts through a search engine with the original sentence as the query.
Outcome: The proposed approach can achieve new state-of-the-art performance on 8 NER data sets across 5 domains.
Detecting Stealthy Backdoor Samples based on Intra-class Distance for Large Language Models (2025.findings-emnlp)

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Challenge: Existing detectors use classifier-style probability signals or rely on rewriting, which can degrade quality and introduce new triggers.
Approach: They propose to efficiently remove poisoned examples before or during fine-tuning .
Outcome: The proposed method outperforms prior detectors on two machine translation datasets and one QA dataset.
WildDoc: How Far Are We from Achieving Comprehensive and Robust Document Understanding in the Wild? (2025.emnlp-main)

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Challenge: Existing benchmarks for document understanding in the wild are based on scanned or digital documents . however, these benchmarks fail to capture the challenges posed by documents in the real world .
Approach: They propose a new benchmark that incorporates a diverse set of manually captured document images reflecting real-world conditions.
Outcome: The proposed model is based on a set of manually captured document images reflecting real-world conditions and is compared with digital or scanned documents.
UniLR: Unleashing the Power of LLMs on Multiple Legal Tasks with a Unified Legal Retriever (2025.acl-long)

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Challenge: Existing retrieval methods are designed for general domains, struggling with legal knowledge, or tailored for specific legal tasks, unable to handle diverse legal knowledge types.
Approach: They propose a novel retrieval method that integrates specialized knowledge into LLMs.
Outcome: The proposed method can perform multiple legal retrieval tasks for LLMs.
Second Language (Arabic) Acquisition of LLMs via Progressive Vocabulary Expansion (2025.acl-long)

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Challenge: In the evolving landscape of large language models, the predominant focus has been on English and Chinese.
Approach: They propose to utilize Arabic-specific vocabulary in the tokenizer to accelerate decoding.
Outcome: The proposed model achieves decent performance comparable to the best Arabic LLMs across various Arabic benchmarks.
DRK: Discriminative Rule-based Knowledge for Relieving Prediction Confusions in Few-shot Relation Extraction (2022.coling-1)

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Challenge: Existing methods to identify relation type in low-resource scenario fall into prediction confusions owing to the limited inference ability over shallow text features.
Approach: They propose a discriminative rule-based knowledge method to identify the relation type between entities in a given text in the low-resource scenario.
Outcome: The proposed method improves on four types of meta tasks with a 6.0% accuracy gain on average.
MultiSQL: A Schema-Integrated Context-Dependent Text2SQL Dataset with Diverse SQL Operations (2024.findings-acl)

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Challenge: Text2SQL is a task that translates natural language into SQL statements.
Approach: They propose a task that translates natural language into SQL statements.
Outcome: The proposed task enables users to convert natural language into SQL statements.
Reinforcement Learning on Pre-Training Data (2026.acl-long)

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Challenge: Recent progress in large language models is driven by scaling of training compute through pre-training with nexttoken prediction (NTP) or post-training (RL) Pre-training using NTP enables models to acquire extensive knowledge and skills from general data, but it suffers from data inefficiency and catastrophic forgetting in continual learning settings.
Approach: They propose to scale training compute through pre-training with next-token prediction (NTP) or post-training by scaling reinforcement learning (RL) to improve learning from general data.
Outcome: Experiments on multiple benchmarks and models show that the proposed approach improves continual pre-training and provides a strong foundation for post-training on Qwen3-8B-Base.
Wasserstein-Fisher-Rao Embedding: Logical Query Embeddings with Local Comparison and Global Transport (2023.findings-acl)

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Challenge: Existing methods for answering complex queries on knowledge graphs lack a local and global scoring function.
Approach: They propose a convolution-based algorithm for linear time computation and a block diagonal kernel to enforce the trade-off between local and global embeddings.
Outcome: The proposed model outperforms existing methods on standard datasets, evaluation sets with combinatorially complex queries, and hierarchical knowledge graphs.
Don’t Tell the Answer, Truly Guide the Reasoning During RL Rollouts (2026.findings-acl)

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Challenge: Existing methods such as GRPO often break down when task difficulty exceeds the model’s capacity, resulting in sparse rewards and inefficient training.
Approach: They propose to measure the compatibility between external guidance and a model's intrinsic policy by introducing an adaptive framework to enhance reasoning performance while explicitly preserving high Affinity.
Outcome: The proposed framework outperforms baseline models while maintaining high Affinity.
Aristotle: Mastering Logical Reasoning with A Logic-Complete Decompose-Search-Resolve Framework (2025.acl-long)

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Challenge: Existing systems fail to fully leverage the structure of logical tasks throughout the reasoning process, causing bottlenecks in efficiency and efficacy.
Approach: They propose a logic-complete reasoning framework, Aristotle, which integrates symbolic expressions and logical rules into the entire reasoning process.
Outcome: The proposed framework outperforms state-of-the-art reasoning frameworks in accuracy and efficiency.
CQG: A Simple and Effective Controlled Generation Framework for Multi-hop Question Generation (2022.acl-long)

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Challenge: Current models can not ensure the complexity of generated questions, so they may generate shallow questions that can be answered without multi-hop reasoning.
Approach: They propose a controlled framework to generate multi-hop questions that contain key entities in multi- hop reasoning chains and a novel Transformer-based decoder to guarantee that key entities appear in the questions.
Outcome: The proposed model outperforms the state-of-the-art model 25% on HotpotQA.
Glyph: Scaling Context Windows via Visual-Text Compression (2026.acl-long)

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Challenge: Large language models (LLMs) traditionally represent text as sequences of discrete tokens . a long-context scaling problem requires processing more tokens more efficiently .
Approach: They propose a framework that renders long texts into compact visual pages and processes them with a vision-language model.
Outcome: The proposed framework renders long texts into compact visual pages and processes them with a vision-language model.
Enhancing LLM Capabilities Beyond Scaling Up (2024.emnlp-tutorials)

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Challenge: general-purpose large language models (LLMs) are expanding in scale and access to unpublic training data.
Approach: This tutorial aims to examine the capabilities of general-purpose large language models . authors discuss adaptation of LLMs to address conflicts, defense against attacks .
Outcome: This tutorial aims to examine the evolution of general-purpose large language models (LLMs) the authors argue that the evolution is dependent on the availability of training data and the scale of the models.
InductionBench: LLMs Fail in the Simplest Complexity Class (2025.acl-long)

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Challenge: Existing benchmarks focus on deductive reasoning, largely overlooking inductive reasoning.
Approach: They propose a benchmark to evaluate the inductive reasoning ability of large language models.
Outcome: The proposed benchmark demonstrates that even the most advanced modelw struggle to master the simplest complexity classes within the subregular hierarchy of functions.
PEER: Pre-training ELECTRA Extended by Ranking (2023.findings-acl)

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Challenge: Existing models for pre-training require expensive pre-trainer computation cost . ELECTRA model can perform replaced token detection (RTD) task with reduced pre- training cost compared to current models .
Approach: They propose to extend a discriminator-based replaced token detection task into a ranker-based task . they propose to use a binary classifier to perform a more precise task with negligible additional computation cost.
Outcome: The proposed model outperforms state-of-the-art models with ELECTRA in GLUE tasks given the same cost.
Speech-Text Pre-training for Spoken Dialog Understanding with Explicit Cross-Modal Alignment (2023.acl-long)

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Challenge: Existing speech-text pre-training methods are limited to one or two specific tasks, despite their success in speech-language processing tasks.
Approach: They propose a temporal position prediction task to capture the speech-text alignment . they use a textual dialog pre-training task to generalize a response selection task .
Outcome: The proposed model is superior in learning speech-text alignment and multi-turn dialog context.
7 Points to Tsinghua but 10 Points to ? Assessing Large Language Models in Agentic Multilingual National Bias (2025.findings-acl)

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Challenge: Large Language Models have garnered significant attention for their capabilities in multilingual natural language processing, but studies on risks associated with cross biases are limited to immediate context preferences.
Approach: They investigate multilingual bias in state-of-the-art Large Language Models by analyzing their responses to decision-making tasks across multiple languages.
Outcome: The proposed model can provide personalized advice across university applications, travel, and relocation scenarios.
Reasoning with Ontology Graph: Toward Type-Constrained Knowledge Graph Question Answering (2026.acl-long)

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Challenge: Existing knowledge graph question answering methods rely on LLM-induced type systems with inconsistent granularity or perform multi-hop reasoning without explicit target-type constraints.
Approach: They propose a type-constrained knowledge graph question answering framework that reasons over a relation-centric ontology graph.
Outcome: The proposed framework achieves state-of-the-art and produces ontology-grounded reasoning chains with substantial Hit@1 gains.
Consultant Decoding: Yet Another Synergistic Mechanism (2025.findings-acl)

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Challenge: Large language models (LLMs) have attracted widespread attention and adoption across diverse domains due to their exceptional performance and robust generalization abilities.
Approach: They propose a synergetic mechanism for Consultant Decoding (CD) that achieves a 2.5-fold increase in inference speed compared to the target model while maintaining comparable generation quality.
Outcome: The proposed mechanism achieves 2.5-fold increase in inference speed while maintaining comparable generation quality (100% of the target model’s performance).
More Than Catastrophic Forgetting: Integrating General Capabilities For Domain-Specific LLMs (2024.emnlp-main)

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Challenge: a recent study shows that performance on general tasks decreases after Large Language Models are fine-tuned on domain-specific tasks.
Approach: They propose a general capability integration approach to integrate general capabilities and domain knowledge within a single instance.
Outcome: The proposed method improves performance on domain-specific tasks by integrating general capabilities and domain knowledge.
World Modeling Makes a Better Planner: Dual Preference Optimization for Embodied Task Planning (2025.acl-long)

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Challenge: Existing approaches focus on action selection or use pre-trained models as world models to enhance planning capabilities.
Approach: They propose a new learning framework that optimizes state prediction and action selection through preference learning.
Outcome: The proposed method outperforms existing methods and GPT-4o on VoTa-Bench and Qwen2-VL (7B), LLaVA-1.6 (7B) and LLama-3.2 (11B).
Cross-Document Cross-Lingual NLI via RST-Enhanced Graph Fusion and Interpretability Prediction (2025.emnlp-main)

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Challenge: Despite the development of many subdirections, Cross-Document Cross-Lingual NLI remains largely unexplored.
Approach: They propose a novel paradigm that extends traditional NLI capabilities to multi-document, multilingual scenarios by integrating RST-enhanced graph fusion with interpretability-aware prediction.
Outcome: The proposed method improves on existing models and document-level NLI to multi-document, multilingual scenarios.
SUN: Exploring Intrinsic Uncertainties in Text-to-SQL Parsers (2022.coling-1)

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Challenge: Existing methods that learn from multiple semantically-equivalent questions are limited to one-to-one mapping .
Approach: They propose a constraint to explore the underlying complementary semantic information among multiple semantically-equivalent questions and learn robust feature representations with reduced spurious associations.
Outcome: The proposed method outperforms strong competitors and achieves state-of-the-art results on five benchmark datasets.
Structural Knowledge Distillation: Tractably Distilling Information for Structured Predictor (2021.acl-long)

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Challenge: Knowledge distillation is a technique to transfer knowledge between models, typically from a large model (the teacher) to a more fine-grained one (the student).
Approach: They propose a factorized form of the knowledge distillation objective for structured prediction which is tractable for many typical choices of the teacher and student models.
Outcome: The proposed model is able to transfer knowledge between teacher and student models without loss of accuracy under four different scenarios.
Astute RAG: Overcoming Imperfect Retrieval Augmentation and Knowledge Conflicts for Large Language Models (2025.acl-long)

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Challenge: Existing studies have not linked the behavior of retrieval augmented generation (RAG) with imperfect retrieval, including irrelevant, misleading, or even malicious information.
Approach: They propose an approach that integrates external knowledge with source-awareness to overcome imperfect retrieval errors in RAG.
Outcome: The proposed approach is superior to previous robustness-enhanced approaches under the worst-case scenario.
Multimodal Dialogue Response Generation (2022.acl-long)

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Challenge: Existing studies focus on multimodal dialogue models but neglect generation methods.
Approach: They propose a multimodal dialogue response generation task which requires multimodal dialogs containing both texts and images which are difficult to obtain.
Outcome: Experiments show that the proposed model can generate informative text and high-resolution image responses.
ADaPT: Token-Level Decoupling for Efficient Large Reasoning Models (2026.findings-acl)

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Challenge: Existing efficiency-oriented methods attempt to shorten or mix reasoning strategies, yet often degrade reasoning capability.
Approach: They propose a token-level dual-process framework that explicitly decouples efficiency and correctness signals during training.
Outcome: The proposed framework reduces inference cost while maintaining strong reasoning ability across multiple benchmarks.
CodexGraph: Bridging Large Language Models and Code Repositories via Code Graph Databases (2025.naacl-long)

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Challenge: Large Language Models excel in stand-alone code tasks but struggle with handling entire code repositories.
Approach: They propose a system that integrates LLM agents with graph database interfaces extracted from code repositories.
Outcome: The proposed system integrates LLM agents with graph database interfaces extracted from code repositories.
PATIENT-𝜓: Using Large Language Models to Simulate Patients for Training Mental Health Professionals (2024.emnlp-main)

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Challenge: Mental illness remains one of the most critical public health issues.
Approach: They propose a patient simulation framework for cognitive behavior therapy training that uses large language models to act as a simulated therapy patient.
Outcome: The proposed framework improves the skill acquisition and confidence of mental health trainees beyond textbooks, videos, and role-play with non-patients.
Enhancing Large Language Models Against Inductive Instructions with Dual-critique Prompting (2024.naacl-long)

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Challenge: Existing studies have focused on how LLMs handle inductive instructions, which may stem from users’ false beliefs or malicious intents.
Approach: They propose a benchmark of Inductive Instructions where false knowledge is incorporated into instructions in multiple different styles.
Outcome: The proposed model improves robustness against inductive instructions, despite different inductive styles and complexity.
CMMaTH: A Chinese Multi-modal Math Skill Evaluation Benchmark for Foundation Models (2025.coling-main)

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Challenge: Large language models excel in various language tasks, while large multimodal models effectively handle visual-language problems.
Approach: They propose to use a multimodal multimodal model evaluation benchmark to evaluate model performance in Chinese K12 classrooms.
Outcome: The proposed model evaluation tool is integrated with the CMMaTH dataset.
DEMO: Reframing Dialogue Interaction with Fine-grained Element Modeling (2025.findings-acl)

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Challenge: Large language models (LLMs) enabled dialogue systems are one of the central modes in human-machine interaction.
Approach: They propose a benchmark task for dialogue element MOdeling and Element Awareness and a new benchmark for dialogue agent interaction that allows the agent to model dialogue elements via imitation learning.
Outcome: The proposed agent performs well in both dialogue element modeling and out-of-domain tasks.
SportsMetrics: Blending Text and Numerical Data to Understand Information Fusion in LLMs (2024.acl-long)

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Challenge: Large language models can handle text and data, but blending text and numerical data presents significant challenges.
Approach: They propose four tasks to evaluate the numerical reasoning and information fusion capabilities of large language models in sports data analytics.
Outcome: The proposed tasks evaluate the numerical reasoning and information fusion capabilities of large language models in sports data analytics.
UniRetriever: Multi-task Candidates Selection for Various Context-Adaptive Conversational Retrieval (2024.lrec-main)

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Challenge: Existing methods for retrieving information from a large corpus of data are sub-optimal and low efficiency.
Approach: They propose a multi-task framework that functions as a universal retriever for three dominant retrieval tasks during the conversation.
Outcome: The proposed framework can perform persona selection, knowledge selection, and response selection tasks simultaneously.
CoEvo: Coevolution of LLM and Retrieval Model for Domain-Specific Information Retrieval (2025.emnlp-main)

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Challenge: Recent methods to enhance queries by generating intermediary elements can degrade retrieval performance . combining LLMs and retrievers can be difficult, resulting in unreliable or irrelevant intermediaries .
Approach: They propose a framework that facilitates the coevolution of large language models and retrieval models.
Outcome: The proposed framework facilitates the coevolution of LLMs and retrieval models.
mDPO: Conditional Preference Optimization for Multimodal Large Language Models (2024.emnlp-main)

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Challenge: Recent studies have attempted to apply DPO to multimodal scenarios but have found it challenging to achieve consistent improvement.
Approach: They propose a multimodal DPO objective that prevents the over-prioritization of language-only preferences by also optimizing image preference.
Outcome: The proposed method significantly improves performance on two multimodal LLMs of different sizes and three widely used benchmarks.
Can LLMs Learn from Previous Mistakes? Investigating LLMs’ Errors to Boost for Reasoning (2024.acl-long)

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Challenge: Recent studies have shown the benefits to LLMs from fine-tuning golden-standard Chain-of-Thought rationales or using them as correct examples in few-shot prompting.
Approach: They propose a new benchmark to test the effectiveness of large language models by leveraging errors to enhance reasoning capabilities.
Outcome: The proposed methods can be used to fine-tune models in correct and incorrect domains, rather than tuning models to learn ground truth in traditional methods.
EPO: Explicit Policy Optimization for Strategic Reasoning in LLMs via Reinforcement Learning (2025.acl-long)

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Challenge: Existing methods for strategic reasoning face challenges in adaptability, scalability, and transferring strategies to new contexts.
Approach: They propose an explicit policy optimization model that provides strategies in open-ended action space and can be plugged into arbitrary LLM agents to motivate goal-directed behavior.
Outcome: The proposed model provides strategies in open-ended action space and can be plugged into arbitrary LLM agents to motivate goal-directed behavior.
VReST: Enhancing Reasoning in Large Vision-Language Models through Tree Search and Self-Reward Mechanism (2025.acl-long)

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Challenge: Large Vision-Language Models (LVLMs) have shown exceptional performance in multimodal tasks, but their effectiveness in complex visual reasoning is constrained.
Approach: They propose a training-free approach that enhances Reasoning in Large Vision-Language Models . they propose integrating Monte Carlo Tree Search and Self-Reward mechanisms into the reasoning tree .
Outcome: The proposed approach surpasses current prompting methods and secures state-of-the-art performance across three multimodal reasoning benchmarks.
Jailbreak LLMs through Internal Stance Manipulation (2025.emnlp-main)

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Challenge: Existing approaches to exploit LLMs' inherent safety mechanism, including GCG and AutoDAN, are ineffective for certain malicious requests.
Approach: They propose a method that generates jailbreak prompts to suppress a refusal stance and induce affirmative responses by modifying adversarial prompts.
Outcome: The proposed method outperforms the best baseline approach in Llama-2-7b-chat and achieves a 92.2% success rate across all models.
Automated Concatenation of Embeddings for Structured Prediction (2021.acl-long)

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Challenge: Recent work shows that better word representations can be obtained by concatenating different types of embeddings.
Approach: They propose to automate the process of finding better concatenated embeddings for structured prediction tasks by concatending different types of embeddables.
Outcome: The proposed approach outperforms baselines and achieves state-of-the-art with fine-tuned embeddings on 6 tasks and 21 datasets.
Monotonic Paraphrasing Improves Generalization of Language Model Prompting (2024.findings-emnlp)

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Challenge: Large language models (LLMs) have demonstrated remarkable proficiency in zero-shot decision making and instruction following.
Approach: They propose an end-to-end decoding strategy that paraphrases given prompts or instructions into their lower perplexity counterparts based on an ensemble of a paraphrase LM for prompt rewriting, and a target LM that constrains the generation for lower perxity.
Outcome: The proposed method can efficiently paraphrase the original prompt without altering its semantic meaning while decreasing the perplexity of each generation as calculated by the target LM.
Pan More Gold from the Sand: Refining Open-domain Dialogue Training with Noisy Self-Retrieval Generation (2022.coling-1)

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Challenge: Existing methods for generating open-domain dialogue systems underutilize training data.
Approach: They propose a retrieval-generation training framework that takes advantage of heterogeneous training data by considering them as "evidence" they use BERTScore retrieval framework which gives better qualities of the training data, they show .
Outcome: The proposed method performs well on zero-shot experiments and is more robust to real-world data.
Geoparsing: Diagram Parsing for Plane and Solid Geometry with a Unified Formal Language (2026.findings-acl)

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Challenge: Recent advances in Multimodal Large Language Models (MLLMs) have demonstrated remarkable capabilities across various vision reasoning tasks.
Approach: They propose a unified formal language that integrates plane and solid geometry, comprehensively covering geometric structures and semantic relations.
Outcome: The proposed language achieves state-of-the-art parsing performance and significantly boosts MLLMs’ capabilities for downstream geometry reasoning tasks.
DialogueCSE: Dialogue-based Contrastive Learning of Sentence Embeddings (2021.emnlp-main)

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Challenge: Conventional approaches to learning sentence embeddings from dialogues employ the siamese-network for this task, but such architecture yields a large gap between training and evaluating.
Approach: They propose a dialogue-based contrastive learning approach to learn sentence embeddings from dialogues using a siamese-network.
Outcome: The proposed model outperforms baseline methods on three multi-turn dialogue datasets in terms of MAP and Spearman’s correlation measures.
VisuoThink: Empowering LVLM Reasoning with Multimodal Tree Search (2025.acl-long)

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Challenge: Existing approaches to large vision-language models fail to capture interleaved nature of human visual-verbal reasoning processes.
Approach: They propose a framework that integrates visuospatial and linguistic domains to facilitate multimodal slow thinking by enabling progressive visual-textual reasoning.
Outcome: Experiments show that VisuoThink significantly improves reasoning capabilities even without fine-tuning.
Understanding Points of Correspondence between Sentences for Abstractive Summarization (2020.acl-srw)

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Challenge: Using points of correspondence, fusion systems are difficult for abstractive summarizers because of their complexity.
Approach: They propose to model points of correspondence between disparate sentences by combining documents, source and fusion sentences, and human annotations of points of correspondance between sentences.
Outcome: The proposed model bridges the gap between coreference resolution and summarization by using human annotations of points of correspondence between sentences.
CoSafe: Evaluating Large Language Model Safety in Multi-Turn Dialogue Coreference (2024.emnlp-main)

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Challenge: Existing studies have not noticed the safety risks of large language models . authors evaluated 1,400 questions in multi-turn dialogue coreference .
Approach: They are the first to evaluate LLM safety in multi-turn dialogue coreference . they created a dataset of 1,400 questions and tested five open-source models .
Outcome: The study shows that model safety decreases in multi-turn dialogue coreference scenarios . the highest success rate was with the LLaMA2-Chat-7b model, while the lowest was with mistral-7B-Instruct model .
Multi-View Cross-Lingual Structured Prediction with Minimum Supervision (2021.acl-long)

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Challenge: Existing work on cross-lingual transfer learning focuses on transferring knowledge from high-resource languages to low-resourced ones.
Approach: They propose a multi-view framework that integrates multiple source models into an aggregated source view and transfers it to a target view based on a task-specific model.
Outcome: The proposed framework improves on three structured prediction tasks on 16 datasets.
InCharacter: Evaluating Personality Fidelity in Role-Playing Agents through Psychological Interviews (2024.acl-long)

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Challenge: Existing methods focus on knowledge and linguistic patterns of characters.
Approach: They propose to evaluate character fidelity of role-playing agents with psychological scales . they propose to use psychological scale to measure personality traits of RPAs based on personality traits.
Outcome: The proposed model reproduces character fidelity with psychological scales and shows that it is effective in measuring personality traits.
WebWalker: Benchmarking LLMs in Web Traversal (2025.acl-long)

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Challenge: Large Language Models (LLMs) have demonstrated impressive capabilities across a wide range of natural language processing tasks.
Approach: They propose a benchmark to assess the ability of LLMs to perform web traversal by using an explore-critic paradigm.
Outcome: The proposed framework mimics human-like web navigation through an explore-critic paradigm and demonstrates the effectiveness of RAG combined with WebWalker in real-world scenarios.
Too Consistent to Detect: A Study of Self-Consistent Errors in LLMs (2025.emnlp-main)

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Challenge: Existing detection methods fail to account for **self-consistent error** . study identifies self-consistency errors and evaluates them .
Approach: They propose a method that fuses hidden state evidence from an external verifier LLM to detect self-consistent errors.
Outcome: The proposed method significantly enhances performance on self-consistent errors across three LLM families.
CPO: Addressing Reward Ambiguity in Role-playing Dialogue via Comparative Policy Optimization (2025.findings-emnlp)

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Challenge: Comparative Policy Optimization (CPO) redefines the reward evaluation paradigm by shifting from sample-wise scoring to comparative group-wise score.
Approach: They propose a method to optimize subjective tasks by shifting from sample-wise to comparative group-wise scoring.
Outcome: The proposed framework shifts from sample-wise scoring to comparative group-wise score . it minimizes contextual bias and enables more robust and fair performance evaluation.
Conversational Question Answering with Language Models Generated Reformulations over Knowledge Graph (2024.findings-acl)

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Challenge: State-of-the-art ConvQA methods struggle with inexplicit question-answer pairs, which can degrade ConvQ performance.
Approach: They propose a reinforcement learning based model, CoRnNet, which utilizes question reformulations generated by large language models to improve ConvQA performance.
Outcome: The proposed model outperforms state-of-the-art ConvQA models by using question reformulations generated by large language models (LLMs).
Blinded by Generated Contexts: How Language Models Merge Generated and Retrieved Contexts When Knowledge Conflicts? (2024.acl-long)

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Challenge: Recent advances in augmenting Large Language Models (LLMs) with auxiliary information have significantly revolutionized their efficacy in knowledge-intensive tasks.
Approach: They propose a systematic framework to identify whether LLMs’ responses are attributed to either generated or retrieved contexts.
Outcome: The proposed framework identifies whether LLMs’ responses are attributed to either generated or retrieved contexts.
SDPO: Segment-Level Direct Preference Optimization for Social Agents (2025.acl-long)

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Challenge: Direct Preference Optimization (DPO) has proven effective in aligning LLM behavior with human preferences across various tasks, but is limited in multi-turn social interactions.
Approach: They propose a method which dynamically selects key segments within interactions to optimize multi-turn agent behavior.
Outcome: The proposed methods outperform existing methods and proprietary LLMs on the SOTOPIA benchmark and show that they can improve social intelligence.
A Unified Encoding of Structures in Transition Systems (2021.emnlp-main)

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Challenge: Existing approaches to encode dynamic structures only encode partial information of structures.
Approach: They propose a new attention-based encoder unifying all structures in a transition system.
Outcome: The proposed method significantly improves the test speed and achieves the best transition-based model.
Recognizing Everything from All Modalities at Once: Grounded Multimodal Universal Information Extraction (2024.findings-acl)

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Challenge: Existing studies on IE tasks have focused on recognizing and analyzing cross-modal information . a multimodal large language model (MLLM) is developed to analyze IE across modalities .
Approach: They propose a multimodal large language model (MLLM) capable of grounding information from all modalities.
Outcome: The proposed framework provides a framework to analyze IE tasks over various modalities and their fine-grained groundings.
TextFusion: Privacy-Preserving Pre-trained Model Inference via Token Fusion (2022.emnlp-main)

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Challenge: Existing methods to preserve inference privacy are available as cloud services . however, the risk of privacy leakage remains, according to recent studies .
Approach: They propose a method to preserve inference privacy by fusing token representations in the cloud.
Outcome: The proposed method preserves inference privacy without sacrificing performance on different scenarios.
Transforming Visual Scene Graphs to Image Captions (2023.acl-long)

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Challenge: Existing approaches to generate captions using image captioning are based on multi-head attention (MHA)
Approach: They propose to transform scene graphs into more descriptive captions by using multi-head attention to build a Graph Neural Network (GNN) . they construct a Mixture-of-Expert (MOE)-based decoder where each expert is built on MHA for discriminating the graph embeddings to generate different kinds of words.
Outcome: The proposed framework can generate captions from multiple visual features and objects . it is based on a mixture-of-expert (MOE)-based decoder based upon MHA .
InFoBench: Evaluating Instruction Following Ability in Large Language Models (2024.findings-acl)

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Challenge: Existing methods for evaluating Large Language Models (LLMs) ability to follow instructions have not been able to provide a detailed analysis of their compliance with instructions.
Approach: They propose a new metric for evaluating Large Language Models' ability to follow instructions and a benchmark for DRFR.
Outcome: The proposed metric and benchmark compared with traditional scoring methods and explores annotation sources including human experts, crowd-sourced workers, and GPT-4.
A Secure and Efficient Federated Learning Framework for NLP (2021.emnlp-main)

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Challenge: Existing FL frameworks require a trusted aggregator or require heavy-weight cryptographic primitives, which makes the performance significantly degraded.
Approach: They propose a framework that is federated and efficient for NLP . they propose to eliminate the need for trusted entities and achieve better model accuracy .
Outcome: The proposed framework achieves better model accuracy and model accuracy than existing FL frameworks.
Dial2vec: Self-Guided Contrastive Learning of Unsupervised Dialogue Embeddings (2022.emnlp-main)

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Challenge: Dialogue embeddings are a critical prerequisite for semantically understanding dialogues.
Approach: They propose a self-guided contrastive learning approach called dial2vec that captures interaction patterns between interlocutors and leverages them to guide the learning of the embeddings corresponding to each interlocuter.
Outcome: The proposed approach achieves 8.7, 9.0, and 13.8 points absolute improvements over the strongest baseline on the three evaluation tasks respectively.
Causal Document-Grounded Dialogue Pre-training (2023.emnlp-main)

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Challenge: Existing methods for document-grounded dialogue (DocGD) rely on general pre-trained language models without a tailored pre-training approach that explicitly captures causal relationships.
Approach: They propose a causally-complete dataset construction strategy for developing million-scale DocGD pre-training corpora and a perturbation-based strategy to capture causality.
Outcome: The proposed strategy yields significant and consistent improvements in fully-supervised, low-resource, few-shot, and zero-shot settings.
Detecting Knowledge Boundary of Vision Large Language Models by Sampling-Based Inference (2025.emnlp-main)

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Challenge: Existing methods to detect the knowledge boundary of Vision Large Language Models (VLLMs) are expensive and require indiscriminate retrieval to address questions that require real-time information or are knowledge-intensive.
Approach: They propose a method that fine-tunes a VLLM on an automatically constructed dataset for boundary identification.
Outcome: The proposed method reduces indiscriminate retrieval while maintaining or improving the performance of a VLLM on an automatically constructed dataset.
Aligning to Constraints for Data-Efficient Language Model Customization (2025.findings-naacl)

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Challenge: General-purpose language models (LMs) are aligned to diverse user intents, but fall short when it comes to specific applications.
Approach: They propose a framework that uses constraints to automatically produce supervision signals for user alignment with constraints.
Outcome: The proposed framework can produce supervision signals for user alignment with constraints.
MUSEG: Reinforcing Video Temporal Understanding via Timestamp-Aware Multi-Segment Grounding (2026.acl-long)

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Challenge: Existing methods for MLLMs struggle with fine-grained temporal reasoning . despite advances in video understanding, current methods struggle with time-sensitive tasks .
Approach: They propose a time-stamp-aware multi-segment grounding method that enhances temporal understanding by introducing timestamps.
Outcome: The proposed method outperforms existing methods on time-sensitive tasks and generalizes well across diverse temporal understanding scenarios.
Scaling Data Diversity for Fine-Tuning Language Models in Human Alignment (2024.lrec-main)

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Challenge: Large language models (LLMs) can reveal toxic or offensive content inadvertently or intentionally.
Approach: They propose to control the diversity of both sides according to the number of samples for fine-tuning, which can directly reflect their impact.
Outcome: The proposed approach improves the performance of large language models after fine-tuning.
AI Hospital: Benchmarking Large Language Models in a Multi-agent Medical Interaction Simulator (2025.coling-main)

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Challenge: Recent large language models (LLMs) have demonstrated superior performance in static medical question answering benchmarks, rivaling even human experts.
Approach: They propose a multi-agent framework emulating dynamic medical interactions between Doctor as player and NPCs including Patient and Examiner to assess the performance of LLM-driven Doctor agents in simulated clinical scenarios.
Outcome: The proposed framework emulates dynamic medical interactions between Doctor as player and NPCs including Patient and Examiner.
Towards Efficient LLM Grounding for Embodied Multi-Agent Collaboration (2025.findings-acl)

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Challenge: Existing methods for grounding large language models suffer from inefficient querying . Existing approaches that rely on physical verification or self-reflection suffer from excessive querying.
Approach: They propose a framework that introduces Reinforced Advantage feedback for efficient self-refinement of plans.
Outcome: The proposed framework surpasses baselines in success rate and significantly decreases interaction steps of agents and query rounds of LLMs.
Contrastive Instruction Tuning (2024.findings-acl)

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Challenge: Current LLMs exhibit limited robustness to unseen instructions, generating inconsistent outputs when the same instruction is phrased with slightly varied forms or language styles.
Approach: They propose a method which maximizes the similarity between the hidden representations of semantically equivalent instruction-instance pairs while minimizing the similarities between semantically different ones.
Outcome: Experiments on the PromptBench benchmark show that Contrastive Instruction Tuning improves LLMs’ robustness to unseen instructions with variations across character, word, sentence, and semantic levels by +2.5% in accuracy.
EIFBENCH: Extremely Complex Instruction Following Benchmark for Large Language Models (2025.emnlp-main)

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Challenge: Existing benchmarks focusing on single-task environments with limited constraints lack the complexity required to fully reflect the evolution of large language models (LLMs).
Approach: They propose to use a Segment Policy Optimization algorithm to enhance the LLM's ability to accurately fulfill multi-task workflows.
Outcome: The proposed benchmarks show that existing benchmarks lack the complexity required to fully reflect the evolution of large language models.
Extending Complex Logical Queries on Uncertain Knowledge Graphs (2025.acl-long)

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Challenge: Existing studies on logical queries on knowledge graphs overlook the incompleteness of KGs.
Approach: They propose an ML-based approach to answer soft queries on uncertain knowledge . they propose to use forward inference and backward calibration to avoid catastrophic errors .
Outcome: The proposed method ensures there are no catastrophic cascading errors while maintaining the same complexity as state-of-the-art inference algorithms for first-order queries.
Leave No Document Behind: Benchmarking Long-Context LLMs with Extended Multi-Doc QA (2024.emnlp-main)

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Challenge: Existing benchmarks for evaluating long-context language models employ irrelevant noise texts to artificially extend the length of test cases, diverging from the real-world scenarios of long-constituency applications.
Approach: They propose a long-context benchmark, Loong, aligning with realistic scenarios through extended multi-document question answering (QA) .
Outcome: The proposed model can scale up the context window of large language models to perform in-depth analysis of multiple long documents.
Universal Information Extraction with Meta-Pretrained Self-Retrieval (2023.findings-acl)

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Challenge: Existing methods for IE are task-specific, resulting in specialized and isolated approaches for different tasks.
Approach: They propose a method to retrieve task-specific knowledge from pretrained language models to enhance universal IE by using a Meta-Pretraining Algorithm.
Outcome: The proposed method achieves the new state-of-the-art on 4 IE tasks, 12 datasets under fully-supervised, low-resource and few-shot scenarios.
ProductAgent: Benchmarking Conversational Product Search Agent with Asking Clarification Questions (2025.emnlp-industry)

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Challenge: Recent advances in conversational information seeking (CIS) suggest a remedy for the lack of interactive clarification when people face unfamiliar domains.
Approach: They propose a fully autonomous conversational information-seeking agent that couples large language models with a set of domain-specific tools to provide product demand clarification.
Outcome: The proposed agent can iterate over 2,000 automatically generated sessions and score high on real-world evaluations without human annotation.
daDPO: Distribution-Aware DPO for Distilling Conversational Abilities (2025.findings-acl)

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Challenge: Knowledge distillation (KD) with Direct Preference Optimization (DPO) has emerged as a promising approach to enhance the conversational abilities of smaller models using a larger teacher model.
Approach: They propose a framework that integrates the teacher's distributional information into DPO distillation while preserving theoretical guarantees.
Outcome: The proposed framework outperforms existing methods in restoring performance for pruned models and enhancing smaller models within the same LLM family.
MoralDial: A Framework to Train and Evaluate Moral Dialogue Systems via Moral Discussions (2023.acl-long)

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Challenge: A moral dialogue system aligned with users’ values could enhance conversation engagement and user connections.
Approach: They propose a framework to train and evaluate moral dialogue systems based on communication mechanisms of morality and a method to construct moral discussions between simulated users and the dialogue system.
Outcome: The proposed framework can train and evaluate moral dialogue systems based on simulated users and their values .
Entity-centered Cross-document Relation Extraction (2022.emnlp-main)

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Challenge: Existing methods for relation extraction only use text snippets surrounding target entities in multiple documents.
Approach: They propose a relation-extraction model that uses cross-path entity relation attention to detect the semantic relations between entities in a given text.
Outcome: The proposed method outperforms the state-of-the-art methods in the dataset CodRED by 10%.
Towards Abstractive Grounded Summarization of Podcast Transcripts (2022.acl-long)

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Challenge: Podcast summarization is of practical benefit to content providers and consumers . however, podcast summarizing faces significant challenges including factual inconsistencies . speech recognizers induce transcription errors and abstractive summarisation models may hallucinate .
Approach: They propose a method to generate podcast summaries while grounding segments in specific regions of the transcript to allow full inspection of summary details.
Outcome: The proposed method can produce an abstractive summary while grounding segments in specific regions of the transcript to allow full inspection of summary details.
Structure-Level Knowledge Distillation For Multilingual Sequence Labeling (2020.acl-main)

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Challenge: Existing multilingual models still underperform individual monolingual models due to model capacity limitations.
Approach: They propose to distill the structural knowledge of several monolingual models (teachers) to the unified multilingual model (student).
Outcome: The proposed model outperforms strong baseline models and teacher models on 4 multilingual tasks with 25 datasets and has stronger zero-shot generalizability.
Ground Every Sentence: Improving Retrieval-Augmented LLMs with Interleaved Reference-Claim Generation (2025.findings-naacl)

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Challenge: Existing methods to enhance credibility and verifiability of large language models (LLMs) mainly focus on passage-level or paragraph-level references or citations, which fall short in verifikatability.
Approach: They propose a method that provides sentence-level citations in LLM-generated responses.
Outcome: The proposed method achieves 90% accuracy in long-form question-answering tasks.
Hint-Based Training for Non-Autoregressive Machine Translation (D19-1)

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Challenge: AutoRegressive Translation models have to generate tokens sequentially during decoding and thus suffer from high inference latency.
Approach: They propose to use hidden states and word alignments to help train NART models.
Outcome: The proposed model improves on the WMT14 En-De and De-En datasets but is faster in inference than the current models.
Multi-Scale Distribution Deep Variational Autoencoder for Explanation Generation (2022.findings-acl)

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Challenge: Existing methods for generating explanations for recommender systems produce generic explanations that fail to incorporate user and item specific details.
Approach: They propose a multi-scale distribution deepvariational autoencoder with a prior network that eliminates noise while retaining meaningful signals in the input.
Outcome: The proposed models can generate explanations with concrete input-specific contents.
FollowBench: A Multi-level Fine-grained Constraints Following Benchmark for Large Language Models (2024.acl-long)

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Challenge: Existing benchmarks focus on evaluating pure response quality, rather than assessing whether the response follows constraints stated in the instruction.
Approach: They propose a Multi-level Fine-grained Constraints Following Benchmark for Large Language Models that adds a single constraint to the initial instruction at each increased level.
Outcome: The proposed model can follow instructions with more constraints, and is deemed to have better instruction-following ability.
Translationese-index: Using Likelihood Ratios for Graded and Generalizable Measurement of Translationese (2025.emnlp-main)

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Challenge: Translationese is a linguistic property that is often introduced in the translation process that is different from those of original texts.
Approach: They propose to use synthesized translations and translations in the wild to evaluate T-index's generalizability in cross-domain settings and its validity against human judgments.
Outcome: The proposed measure can generalize to unseen genres, authors, and language pairs.
Retrieved In-Context Principles from Previous Mistakes (2024.emnlp-main)

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Challenge: Recent advances in in-context learning (ICL) have limited customization and inadequate error coverage.
Approach: They propose a method to retrieve in-context principles from mistakes to improve model performance.
Outcome: The proposed framework enhances model performance when applied to various prompting strategies.
Improving Factuality of Abstractive Summarization without Sacrificing Summary Quality (2023.acl-short)

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Challenge: Recent studies have shown that most abstractive summarization models are unfaithful and suffer from a wide range of hallucination.
Approach: They propose a candidate summary generation and ranking technique to improve summary factuality without sacrificing quality.
Outcome: The proposed method shows that the model trained using the proposed method improves on factuality and similarity-based metrics without conflicting with the model.
Does Your Model Classify Entities Reasonably? Diagnosing and Mitigating Spurious Correlations in Entity Typing (2022.emnlp-main)

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Challenge: Existing entity typing models are subject to spurious correlations due to shortcuts and biased training.
Approach: They propose a method to augment existing model biases by combining spurious correlations with debiasedcounterparts to improve generalization.
Outcome: The proposed method improves generalization of different entity typing models on the original and debiased test sets.
MuVER: Improving First-Stage Entity Retrieval with Multi-View Entity Representations (2021.emnlp-main)

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Challenge: Recent advances in entity retrieval ignore the property that meanings of entity mentions diverge in different contexts and are related to various portions of descriptions.
Approach: They propose a novel approach that constructs multi-view representations for entity descriptions and approximates the optimal view for mentions via a heuristic searching method.
Outcome: The proposed approach achieves state-of-the-art performance on ZESHEL and improves quality of candidates on three standard Entity Linking datasets.
Let LLMs Take on the Latest Challenges! A Chinese Dynamic Question Answering Benchmark (2025.coling-main)

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Challenge: Recent work has noted that due to the extremely high cost of iterative updates of LLMs, they are often unable to answer dynamic questions well.
Approach: They propose a Chinese Dynamic QA benchmark containing question-answer pairs related to the latest dynamic questions on the Chinese Internet.
Outcome: The proposed benchmark will be one of the key data resources for improving LLMs’ Chinese question-answering ability in the future.
MOA: Multi-Objective Alignment for Role-Playing Agents (2026.acl-long)

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Challenge: Prior work on role-playing agents relies on supervised fine-tuning or reinforcement learning with scalarized rewards, but these approaches do not address the coordination of multiple reward dimensions during optimization.
Approach: They propose a reinforcement-learning framework that enables multi-dimensional, fine-grained rubric optimization for general RPAs.
Outcome: Experiments on PersonaGym and RoleMRC show that MOA improves multi-dimensional role-playing performance over supervised and standard RL baselines.
IRT-Router: Effective and Interpretable Multi-LLM Routing via Item Response Theory (2025.acl-long)

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Challenge: Large language models have demonstrated exceptional performance across a wide range of tasks . however, selecting the optimal LLM to respond to a user query often necessitates a delicate balance between performance and cost.
Approach: They propose a multi-LLM routing framework that efficiently routes user queries to the most suitable LLM.
Outcome: The proposed framework outperforms baseline methods in terms of effectiveness and interpretability.
BiSyn-GAT+: Bi-Syntax Aware Graph Attention Network for Aspect-based Sentiment Analysis (2022.findings-acl)

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Challenge: Aspect-based sentiment analysis is challenging because a sentence may contain multiple aspects or complicated relationships.
Approach: They propose a bi-syntax aware Graph Attention Network to model the context of every aspect and sentiment relations across aspects for learning.
Outcome: The proposed model outperforms the state-of-the-art methods on four benchmark datasets.
Salience Allocation as Guidance for Abstractive Summarization (2022.emnlp-main)

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Challenge: Abstractive summarization models implicitly learn to capture the salient information from scratch.
Approach: They propose a method that uses salience expectation to guide abstractive summarization by averaging salient content to a fixed threshold.
Outcome: The proposed method can be easily adapted to documents with various abstractiveness and achieves high performance.
Dense Retrieval as Indirect Supervision for Large-space Decision Making (2023.findings-emnlp)

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Challenge: Dense Decision Retrieval (DDR) is a learning-to-retrieve task for discriminative natural language understanding (NLU) tasks with large label spaces.
Approach: They propose a novel approach to learning large-space discriminative NLU tasks as a learning-to-retrieve task by adopting a dual-encoder architecture that learns to predict by retrieving from a decision thesaurus.
Outcome: The proposed approach outperforms baselines greatly on multi-label classification tasks, 1.17% in F1 score ultra-fine entity typing, and 1.26% in accuracy on three few-shot intent classification tasks on average.
More Embeddings, Better Sequence Labelers? (2020.findings-emnlp)

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Challenge: Existing work suggests contextual embeddings improve sequence labeling accuracy . but, there is no definite conclusion on whether concatenating different kinds of embeddables is effective .
Approach: They propose a family of contextual embeddings that improves sequence labeling accuracy . they conduct extensive experiments on 3 tasks over 18 datasets and 8 languages .
Outcome: The proposed family of contextual embeddings improves the accuracy of sequence labelers over non-contextual embedders.
RedOne: Revealing Domain-specific LLM Post-Training in Social Networking Services (2025.emnlp-industry)

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Challenge: Social networking services (SNS) have experienced rapid growth, which has proposed significant challenges for platform content management and interaction quality improvement.
Approach: They propose a domain-specific LLM to break the performance bottleneck of single-task baselines and establish a comprehensive foundation for social networking services.
Outcome: The proposed model achieves an average improvement of 14.02% across 8 major tasks and 7.56% in bilingual evaluation benchmark, compared with baseline models.
Exploiting Contrastive Learning and Numerical Evidence for Confusing Legal Judgment Prediction (2023.findings-emnlp)

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Challenge: Existing studies fail to distinguish different classification errors with a standard cross-entropy classification loss and ignore the numbers in the fact description for predicting the term of penalty.
Approach: They propose to extract crime amounts from fact description and use them to learn distinguishable representations to exploit the numbers in the fact description for predicting the term of penalty.
Outcome: The proposed method achieves state-of-the-art results on real-world datasets and ablation studies demonstrate the effectiveness of each component.
From Discrimination to Generation: Low-Resource Intent Detection with Language Model Instruction Tuning (2024.findings-acl)

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Challenge: Existing studies fine-tune discriminative models on specific defined intent classes, preventing them from being directly adopted to new intent domains.
Approach: They propose to use a pre-trained generative intent model to detect new intents from different domains with no parameter updates.
Outcome: The proposed model outperforms baselines that need further fine-tuning or domain-specific samples.
Self-Improvement Programming for Temporal Knowledge Graph Question Answering (2024.lrec-main)

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Challenge: Existing methods implicitly model time constraints by learning time-aware embeddings of questions and candidate answers, which is far from understanding the question comprehensively.
Approach: They propose a temporal-based temporal programming method that leverages the in-context learning ability of Large Language Models to understand combinatory time constraints in questions.
Outcome: The proposed method outperforms existing methods on multiTQ and CronQuestions datasets and is highly efficient on multi-level questions.
The Evolution of Thought: Tracking LLM Overthinking via Reasoning Dynamics Analysis (2026.acl-long)

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Challenge: Explicit reasoning trajectories increase performance but often trigger overthinking . despite its importance, this study examines how each step of reasoning affects the final outcome .
Approach: They propose a Reasoning Completion Point Detector that detects the RCP by monitoring rank dynamics of termination tokens.
Outcome: The proposed method reduces token usage by up to 44% while preserving accuracy.
CorefQA: Coreference Resolution as Query-based Span Prediction (2020.acl-main)

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Challenge: Existing coreference resolution models suffer from mention proposal.
Approach: They propose a query-based span prediction task that can retrieve mentions left out at the mention proposal stage.
Outcome: The proposed model can retrieve mentions left out at the mention proposal stage and improve generalization capability using existing question answering datasets.
Rethinking Tabular Data Understanding with Large Language Models (2024.naacl-long)

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Challenge: Large Language Models (LLMs) are capable of various tasks, yet their capability in interpreting and reasoning over tabular data remains an underexplored area.
Approach: They propose a method for table structure normalization to improve model performance . they propose aggregation of multiple reasoning pathways to improve performance based on textual and symbolic reasoning.
Outcome: The proposed method improves performance on symbolic reasoning tasks with textual reasoning slightly outperforming symbolic reasoning on tables.
GPT-NER: Named Entity Recognition via Large Language Models (2025.findings-naacl)

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Challenge: Large-scale language models (LLMs) have shown impressive ability for in-context learning with limited training data.
Approach: They propose a novel sequence labeling task that transforms a sequence labeled as a text-generation task into a self-verification task that LLMs can adapt to.
Outcome: The proposed model performs better on NER than supervised models on a variety of tasks . the proposed model can be easily adapted by LLMs to generate a text sequence .
Robust Natural Language Understanding with Residual Attention Debiasing (2023.findings-acl)

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Challenge: Existing ensemble-based debiasing methods do not address unintended dataset biases . attention plays a crucial role in providing robust prediction in NLU models .
Approach: They propose an end-to-end debiasing method that mitigates unintended biases from attention.
Outcome: The proposed method improves the OOD performance of BERT-based models on three benchmarks.
Towards Identifying Social Bias in Dialog Systems: Framework, Dataset, and Benchmark (2022.findings-emnlp)

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Challenge: a number of safety concerns hinder the deployment of open-domain dialog systems, such as offensive languages and toxic behaviors, such social bias is difficult to detect.
Approach: They propose a Dial-Bias Framework for analyzing social bias in conversations . they introduce a Chinese social bias dialog dataset and conduct in-depth ablation studies .
Outcome: The proposed framework is the first annotated Chinese social bias dialog dataset . the proposed framework also provides a fine-grained dialog bias measurement benchmark .
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.
MANNER: A Variational Memory-Augmented Model for Cross Domain Few-Shot Named Entity Recognition (2023.acl-long)

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Challenge: Named Entity Recognition (NER) is a fundamental NLP task that aims at classifying mention spans into entity types.
Approach: They propose a variational memory-augmented few-shot named entity recognition model that uses a memory module to store information from source domain and retrieve relevant information from the memory to augment few-shot task in target domain.
Outcome: The proposed model can adapt the learned knowledge from source domain to target domain and achieve superior performance on English and Chinese cross domain few-shot NER datasets.
Defending Large Language Models Against Jailbreaking Attacks Through Goal Prioritization (2024.acl-long)

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Challenge: Despite the success of jailbreaking attacks, there is a lack of effort in defending against them.
Approach: They propose to integrate goal prioritization at both training and inference stages to counteract this conflict between the goals of being helpful and ensuring safety.
Outcome: The proposed approach reduces the Attack Success Rate (ASR) of jailbreaking from 66.4% to 3.6% for ChatGPT and reduces it from 71.0% to 6.6% for Llama2-13B.
Bridging the Gap between Synthetic and Natural Questions via Sentence Decomposition for Semantic Parsing (2023.tacl-1)

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Challenge: Existing methods to train a parser to perform zero-shot learning are limited by the lack of training data.
Approach: They propose a decomposition-based method to unify the sentence structures of questions . their method can generalize to natural questions with novel text expressions .
Outcome: The proposed method improves on synthetic data and on complex web questions with novel expressions.
Compilable Neural Code Generation with Compiler Feedback (2022.findings-acl)

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Challenge: Existing deep-learning approaches model code generation as text generation, but few of them account for compilability of the generated programs.
Approach: They propose a three-stage pipeline utilizing compiler feedback for compilable code generation to improve compilability.
Outcome: The proposed pipeline improves compilability of generated programs by combining compiler feedback, language model fine-tuning, and compilable discrimination.
InternLM-Law: An Open-Sourced Chinese Legal Large Language Model (2025.coling-main)

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Challenge: InternLM-Law is a large language model (LLM) tailored for addressing diverse legal tasks related to Chinese laws.
Approach: They introduce a large language model (LLM) tailored for addressing diverse legal tasks related to Chinese laws.
Outcome: The proposed model performs better than existing models in a variety of legal tasks related to Chinese laws.
StructuralLM: Structural Pre-training for Form Understanding (2021.acl-long)

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Challenge: Existing pre-trained language models focus on text-only representation, neglecting cell-level layout information.
Approach: They propose a pre-training approach to leverage cell and layout information from scanned documents.
Outcome: The proposed model achieves state-of-the-art in various downstream tasks . it uses 2Dposition embeddings to model word-level layout information .
Instructional Fingerprinting of Large Language Models (2024.naacl-long)

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Challenge: Large language models (LLMs) require considerable cost to train from scratch . fingerprinting is essential to protect intellectual property and to ensure downstream users and developers adhere to their license terms.
Approach: They propose a method for fingerprinting Large language models that implants a private key into the model to generate specific text when the key is present.
Outcome: The proposed method prevents publisher overclaim and maintains robustness against fingerprint guessing and parameter-efficient training.
Advancing Sequential Numerical Prediction in Autoregressive Models (2025.acl-short)

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Challenge: Autoregressive models are the de facto choice for sequence generation tasks, but standard approaches treat digits as independent tokens and apply cross-entropy loss, overlooking the coherent structure of numerical sequences.
Approach: They propose a novel approach to entropy loss by extending the Earth Mover’s Distance to preserve ordinal relationships between numerical values and sequence-level to penalize the overall discrepancy between predicted and actual sequences.
Outcome: Extensive experiments show that NTIL improves numerical prediction and integrates effectively with LLMs/MLLMs.
A Synthetic Data Generation Framework for Grounded Dialogues (2023.acl-long)

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Challenge: Existing approaches to train grounded dialogues require large amounts of data.
Approach: They propose a synthetic data generation framework for grounded dialogues that takes knowledge data and heuristics to determine a dialogue flow and incrementally turn it into a dialog.
Outcome: The proposed framework significantly boosts model performance in training data and low-resource scenarios.
Learning to Fuse Sentences with Transformers for Summarization (2020.emnlp-main)

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Challenge: Abstractive summarization systems that fuse sentences are not rewarded for correctly fusing sentences.
Approach: They propose to leverage the knowledge of points of correspondence between sentences to enhance their ability to fuse sentences.
Outcome: The proposed algorithms improve the ability of the proposed summarization systems to fuse sentences and show that they can fuse sentences in a way that retains the original meaning.
mPLUG: Effective and Efficient Vision-Language Learning by Cross-modal Skip-connections (2022.emnlp-main)

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Challenge: Existing pre-trained vision-language models suffer from inefficiency and linguistic signal overwhelmed by long visual sequences in cross-modal alignment.
Approach: They propose a vision-language foundation model with cross-modal skip-connections that can be pre-trained end-to-end on large-scale image-text pairs with both discriminative and generative objectives.
Outcome: The proposed model achieves state-of-the-art results on a wide range of vision-language downstream tasks, including image captioning, image-text retrieval, visual grounding and visual question answering.
Unsupervised Multimodal Clustering for Semantics Discovery in Multimodal Utterances (2024.acl-long)

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Challenge: Existing methods for semantics discovery focus on text, video, and audio, failing to leverage the rich multimodal information in the real world.
Approach: They propose a method to construct augmentation views for multimodal data and use them to perform pre-training to establish well-initialized representations for subsequent clustering.
Outcome: The proposed method improves on benchmark multimodal intent and dialogue act datasets by 2-6% over state-of-the-art methods.
Parallel Instance Query Network for Named Entity Recognition (2022.acl-long)

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Challenge: Named entity recognition is a fundamental task in natural language processing.
Approach: They propose a method that sets up global and learnable instance queries to extract entities from a sentence in a parallel manner.
Outcome: The proposed method outperforms existing state-of-the-art models on nested and flat datasets.
Multi-modal Action Chain Abductive Reasoning (2023.acl-long)

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Challenge: Existing models for Abductive Reasoning are limited in their ability to infer the most plausible explanation of incomplete known phenomena.
Approach: They propose a vision-language task that aims to imagine the most plausible event by spatio-temporal grounding in past video and infer the hypothesis of subsequent action chain layer by layer.
Outcome: The proposed model outperforms existing video-language models in terms of effectiveness on the proposed dataset.
Embracing Imperfection: Simulating Students with Diverse Cognitive Levels Using LLM-based Agents (2025.acl-long)

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Challenge: Large language models (LLMs) are becoming increasingly popular in education, enabling researchers to simulate students' learning patterns and learning patterns.
Approach: They propose a training-free framework for student simulation that takes into account student cognitive diversity and realism.
Outcome: The proposed model outperforms baseline models and achieves 100% improvement in simulation accuracy and realism.
Pruning Foundation Models for High Accuracy without Retraining (2024.findings-emnlp)

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Challenge: Despite the superior performance of foundation models, it is challenging to deploy large language models in practical applications due to their massive parameters and computations.
Approach: They propose a pruning algorithm to prune LLMs in one-shot without retraining . they propose retrainable pruning algorithms to prune multiple weights in LLM .
Outcome: The proposed pruning methods perform better than baseline pruning methods on sparse and unstructured sparsity models.
Toward Unifying Text Segmentation and Long Document Summarization (2022.emnlp-main)

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Challenge: Abstractive strategies produce more condensed summaries, but they suffer from hallucinations and factual errors, which pose a more difficult generation challenge.
Approach: They propose a method that learns robust sentence representations by performing summarization and segmentation simultaneously, which is further enhanced by an optimization-based regularizer to promote selection of diverse summary sentences.
Outcome: The proposed model achieves state-of-the-art performance on publicly available benchmarks and better cross-genre transferability when equipped with text segmentation.
An Investigation of Potential Function Designs for Neural CRF (2020.findings-emnlp)

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Challenge: Existing approaches to sequence labeling are based on the neural linear-chain CRF model.
Approach: They propose a series of increasingly expressive potential functions for neural CRF models that integrate emission and transition functions and explicitly take contextual words as input.
Outcome: The proposed model consistently achieves the best performance on the decomposed quadrilinear potential function based on the representations of two neighboring labels and two neighbored words.
FlattenQuant: Breaking through the Inference Compute-bound for Large Language Models with Per-tensor Quantization (2024.lrec-main)

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Challenge: Large language models (LLMs) have demonstrated state-of-the-art accuracies across tasks, but their latency and GPU memory consumption limit their performance.
Approach: They propose a method which flattens the tensor to achieve low bit per-tensori quantization with minimal accuracy loss.
Outcome: The proposed method achieves low bit per-tensor quantization with minimal accuracy loss.
Constructing a Chinese Medical Conversation Corpus Annotated with Conversational Structures and Actions (L18-1)

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Challenge: Recent studies have found that patients' advocacy for antibiotic treatment is consequential on antibiotic over-prescribing.
Approach: They propose to analyze a manually transcribed corpus of medical dialogue in Chinese pediatric consultations with annotation of conversational structures and actions.
Outcome: The proposed corpus can shed light on ways to improve physician-patient communication in order to reduce antibiotic over-prescribing.
FlowBench: Revisiting and Benchmarking Workflow-Guided Planning for LLM-based Agents (2024.findings-emnlp)

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Challenge: LLM-based agents are susceptible to undesired planning hallucinations when lacking specific knowledge for expertise-intensive tasks.
Approach: They propose a benchmark to evaluate the efficacy of workflow-guided agent planning by formalizing different formats of workflow knowledge.
Outcome: The proposed benchmark aims to improve the planning reliability of LLM-based agents by incorporating external workflow-related knowledge.
UAlign: Leveraging Uncertainty Estimations for Factuality Alignment on Large Language Models (2025.acl-long)

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Challenge: Large Language Models (LLMs) often struggle to accurately express factual knowledge, especially in cases where the knowledge boundaries are ambiguous.
Approach: They propose a framework that leverages Uncertainty estimations to represent knowledge boundaries and incorporates these representations into prompts for LLMs to Align with factual knowledge.
Outcome: The proposed framework significantly improves the LLMs’ capacities to confidently answer known questions and refuse unknown questions on both in-domain and out-of-domain tasks.
GlotEval: A Test Suite for Massively Multilingual Evaluation of Large Language Models (2025.emnlp-demos)

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Challenge: Existing evaluation frameworks focus on English and a handful of high-resource languages, thereby overlooking the realistic performance of large language models in multilingual and lower-resourced scenarios.
Approach: They propose a unified and lightweight framework that integrates 27 benchmarks under a standard ISO 639-3 language identifier system to enable seamless incorporation of new benchmarks.
Outcome: The proposed framework integrates 27 benchmarks under a standard ISO 639-3 language identifier system, allowing for seamless incorporation of new benchmarks.
OS Agents: A Survey on MLLM-based Agents for Computer, Phone and Browser Use (2025.acl-long)

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Challenge: a new generation of (M)LLMs is enabling the creation of superintelligent AI assistants . OS Agents can complete tasks autonomously and have the potential to significantly enhance the lives of billions of users worldwide.
Approach: They propose to build OS Agents that operate within operating systems' GUIs and GUIs . they examine evaluation metrics and benchmarks to identify promising directions .
Outcome: The proposed agents are based on operating systems (OS) and operating systems frameworks.
Clear Up Confusion: Iterative Differential Generation for Fine-grained Intent Detection with Contrastive Feedback (2025.coling-main)

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Challenge: Recent studies on fine-grained intent detection have focused on collecting large-scale and high-quality samples via crowdsourcing resulting in data scarcity.
Approach: They propose an iterative differential generation framework with contrastive feedback to generate high-quality pseudo samples and accurately capture the crucial nuances in target class distribution.
Outcome: The proposed framework generates high-quality pseudo samples and captures crucial nuances in target class distribution.
EviReport: From Reasoned Outlines to Evidence Tracked Long-Form Reports (2026.findings-acl)

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Challenge: Evidence-intensive reports often produce fluent but under-supported drafts . eviReport is an evidence-grounded workflow for automated long-form report generation .
Approach: They propose an evidence-tracked workflow that organizes corpus evidence into compact, traceable units and retrieves query-relevant subgraphs into retrieval-ready packages.
Outcome: The proposed workflow outperforms baselines in factual coverage, factual accuracy and visual evidence integration.
Retrieval-free Knowledge Injection through Multi-Document Traversal for Dialogue Models (2023.acl-long)

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Challenge: Existing research on retrieval-augmented and retrieval free dialogue models focuses on retrieving knowledge from external sources and rely on finely annotated retrieval training data and knowledge-grounded responses.
Approach: They propose a retrieval-free approach by turning knowledge documents into simulated multi-turn dialogues using a Multi-Document Traversal algorithm.
Outcome: The proposed approach outperforms retrieval-augmented models while being cheaper and faster at domain transfer.
Factuality of Large Language Models: A Survey (2024.emnlp-main)

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Challenge: Large language models (LLMs) are factually incorrect, which limits their applicability in real-world scenarios.
Approach: They analyze existing work to identify major challenges and their associated causes . they propose to evaluate LLMs using a variety of measures to mitigate factual errors .
Outcome: The proposed methods are based on a variety of datasets and proposed strategies to mitigate factual errors.
Text Classification via Large Language Models (2023.findings-emnlp)

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Challenge: Large-scale Language Models (LLMs) have shown the ability for in-context learning.
Approach: They propose a progressive reasoning strategy tailored to addressing complex linguistic phenomena such as intensification, contrast, irony and limited number of tokens allowed in in-context learning.
Outcome: The proposed model performs better on 4 out of 5 widely-used text-classification benchmarks, while demonstrating comparable performance to SOTA on MR.
Knowledge Mechanisms in Large Language Models: A Survey and Perspective (2024.findings-emnlp)

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Challenge: Using large language models, we can understand knowledge mechanisms in LLMs for learning, storage, utilization, and evolution.
Approach: They propose to analyze knowledge mechanisms in Large Language Models (LLMs) they examine utilization, evolution, and the potential dark knowledge (hypothesis) they hope to help understand knowledge in LLMs and provide insights for future research .
Outcome: The proposed model can be used to analyze the evolution of parametric knowledge in LLMs.
SimpleDeepSearcher: Deep Information Seeking via Web-Powered Reasoning Trajectory Synthesis (2025.findings-emnlp)

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Challenge: Existing approaches to deep search training lack high-quality training trajectories, prohibitive computational costs and lack of high-fidelity training data.
Approach: They propose a framework that synthesizes high-quality training data by simulating real user interactions in live web search environments.
Outcome: The proposed framework synthesizes high-quality training data by simulating user interactions in live web search environments.
Rethinking Expert Trajectory Utilization in LLM Post-training for Mathematical Reasoning (2026.acl-long)

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Challenge: evolving generic Large Language Models into specialized Large Reasoning Models requires effective post-training.
Approach: They propose a plasticity-ceiling framework to harness expert trajectories . they establish the Sequential SFT-then-RL pipeline as the superior standard .
Outcome: The proposed framework overcomes stability and premature convergence deficits in synchronized approaches.
Meta Distant Transfer Learning for Pre-trained Language Models (2021.emnlp-main)

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Challenge: Notable PLMs are available for text classification tasks, but performance of PLM on downstream tasks may be limited by the availability of training set.
Approach: They propose a meta-learning framework to learn the transferable knowledge across tasks using PLMs.
Outcome: The proposed framework outperforms baselines on seven datasets and is task-agnostic and unbiased.
Refining and Synthesis: A Simple yet Effective Data Augmentation Framework for Cross-Domain Aspect-based Sentiment Analysis (2024.findings-acl)

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Challenge: Aspect-based Sentiment Analysis (ABSA) data augmentation has attracted increasing attention in recent years due to data sparsity.
Approach: They propose a framework to augment ABSA data using pseudo labels for target domain . they refine generated labeled data using a natural language inference filter .
Outcome: The proposed framework outperforms 7 strong baselines on 4 kinds of ABSA tasks.
RaFe: Ranking Feedback Improves Query Rewriting for RAG (2024.findings-emnlp)

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Challenge: Large Language Models (LLMs) and Retrieval Augmentation Generation (RAG) techniques have evolved to enhance document retrieval by reformulating queries.
Approach: They propose a framework for training query rewriting models that leverages a reranker framework.
Outcome: The proposed framework provides ranking feedback aligned well with the rewriting objectives without needing signals from annotations and supports both online and offline training models.
Role Prompting Guided Domain Adaptation with General Capability Preserve for Large Language Models (2024.findings-naacl)

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Challenge: Large Language Models (LLMs) suffer catastrophic forgetting when tailored to specific domains . authors present a novel approach to manage multi-domain LLM adaptation .
Approach: They propose a strategy to manage multi-domain LLM adaptation using self-distillation and role integration.
Outcome: The proposed model alleviates catastrophic forgetting and inter-domain confusion while maintaining robust general capabilities.
SynWorld: Virtual Scenario Synthesis for Agentic Action Knowledge Refinement (2025.acl-short)

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Challenge: Using Large Language Models (LLMs)-based agents can enhance their understanding of environments and tasks.
Approach: They propose a framework that allows agents to synthesize possible scenarios with multi-step action invocation within the action space and perform Monte Carlo Tree Search exploration to refine their action knowledge in the current environment.
Outcome: The proposed framework synthesizes possible scenarios with multi-step action invocation within the action space and performs Monte Carlo Tree Search exploration to refine action knowledge in the current environment.
AIN: Fast and Accurate Sequence Labeling with Approximate Inference Network (2020.emnlp-main)

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Challenge: Existing approaches to sequence labeling require sequential computation that makes parallelization impossible.
Approach: They propose to employ a parallelizable approximate variational inference algorithm for the CRF model.
Outcome: The proposed approach improves decoding speed and accuracy with long sentences and is parallelizable for faster training and prediction.
BaseCal: Unsupervised Confidence Calibration via Base Model Signals (2026.acl-long)

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Challenge: Post-trained LLMs typically compromise reliability with severe overconfidence, resulting in inaccurate responses.
Approach: They propose a solution that feeds PoLLMs into the base LLM to get confidence.
Outcome: The proposed solution reduces expected calibration error (ECE) by 42.90% compared to the best unsupervised baselines.
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.
SudoLM: Learning Access Control of Parametric Knowledge with Authorization Alignment (2025.acl-long)

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Challenge: Existing preference alignment is a one-size-fits-all alignment mechanism, where the part of the large language model parametric knowledge with non-preferred features is uniformly blocked to all the users.
Approach: They propose a framework that lets LLMs learn access control over parametric knowledge for users with different credentials via authorization alignment.
Outcome: Experiments on two application scenarios show that the proposed framework effectively controls the user’s access to parametric knowledge and maintains its general utility.
Multimodal Recommendation Dialog with Subjective Preference: A New Challenge and Benchmark (2023.findings-acl)

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Challenge: Existing multimodal task-oriented dialog data fails to demonstrate the diverse expressions of user subjective preferences and recommendation acts in the real-life shopping scenario.
Approach: They propose a multimodal task-oriented dialog dataset with subjective preferences and recommendation acts that is well-annotated with sales experts.
Outcome: The proposed model is powered by a state-of-the-art multimodal model for these tasks.
Dual Class Knowledge Propagation Network for Multi-label Few-shot Intent Detection (2023.acl-long)

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Challenge: Existing studies on multi-label intent detection are confused by the identical representation of the utterance with multiple labels and overlook the intrinsic intra-class and inter-class relations.
Approach: They propose a dual class knowledge propagation network to learn well-separated representations for utterances with multiple intents.
Outcome: The proposed method outperforms baselines on two multi-label intent datasets by a large margin.
TextFlint: Unified Multilingual Robustness Evaluation Toolkit for Natural Language Processing (2021.acl-demo)

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Challenge: Existing approaches to textual robustness evaluation focus on slightly modifying the input data, which maintains the original meaning and results in a different prediction.
Approach: They propose a multilingual robustness evaluation toolkit for NLP that integrates universal text transformations, task-specific transformations and adversarial attack.
Outcome: The toolkit includes universal text transformation, task-specific transformation, adversarial attack, subpopulation, and their combinations to provide comprehensive robustness analyses.
An Expert is Worth One Token: Synergizing Multiple Expert LLMs as Generalist via Expert Token Routing (2024.acl-long)

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Challenge: Large language models (LLMs) have demonstrated remarkable capabilities across a wide spectrum of tasks, but performance and reliability in certain specialized domains still fall short of expectations.
Approach: They propose a unified generalist framework that facilitates seamless integration of multiple expert LLMs.
Outcome: The proposed framework outperforms existing multi-LLM collaboration paradigms across six diverse expert domains.
VECO: Variable and Flexible Cross-lingual Pre-training for Language Understanding and Generation (2021.acl-long)

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Challenge: Existing work in multilingual pretraining relies on the shared vocabulary and bilingual contexts to encourage the correlation across languages.
Approach: They propose to plug a cross-attention module into a Transformer encoder to explicitly build the interdependence between languages.
Outcome: The proposed model outperforms existing models on XTREME and English-to-French translation datasets.
Joint Chinese Word Segmentation and Part-of-speech Tagging via Two-way Attentions of Auto-analyzed Knowledge (2020.acl-main)

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Challenge: Chinese word segmentation and part-of-speech tagging are important fundamental tasks in natural language processing.
Approach: They propose a neural model for Chinese word segmentation and part-of-speech tagging . they incorporate context features and syntactic knowledge for each input character .
Outcome: The proposed model can learn and benefit from existing tools, but its quality may be poor.
Dynamic Stochastic Decoding Strategy for Open-Domain Dialogue Generation (2024.findings-acl)

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Challenge: Stochastic sampling strategies are not widely used in open-domain dialogue systems.
Approach: They propose a dynamic decoding strategy which can adjust the decoding space w.r.t. different contexts.
Outcome: The proposed decoding strategy can improve the performance of pre-trained models when coupled with four well-used stochastic decoding algorithms.
AEG: Argumentative Essay Generation via A Dual-Decoder Model with Content Planning (2022.emnlp-main)

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Challenge: Existing studies on argument generation focus on generating individual short arguments, while research on generating long and coherent argumentative essays is under-explored.
Approach: They propose a task to automatically generate argumentative essays using a writing prompt.
Outcome: The proposed model generates persuasive essays with higher diversity and less repetition compared to baselines.
Improving Retrieval Augmented Open-Domain Question-Answering with Vectorized Contexts (2024.findings-acl)

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Challenge: Retrieval Augmented Generation can be used to process long contexts in Open-Domain Question-Answering tasks.
Approach: They propose a method to cover longer contexts in Open-Domain Question-Answering tasks by using a small encoder language model and cross-attention with origin inputs.
Outcome: The proposed method can cover longer contexts while keeping the computing requirements close to the baseline.
Combating Security and Privacy Issues in the Era of Large Language Models (2024.naacl-tutorials)

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Challenge: a tutorial aims to provide a summary of risks and vulnerabilities in large language models . a number of studies have focused on security, privacy and copyright aspects of LLMs .
Approach: This tutorial seeks to provide a systematic summary of risks and vulnerabilities in large language models . authors will discuss security, privacy and copyright aspects of LLMs .
Outcome: This tutorial aims to provide a systematic summary of risks and vulnerabilities in large language models . it will also outline emerging challenges in security, privacy and reliability of LLMs .

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