Papers by Zhen Wang

124 papers
Sentence Matching with Syntax- and Semantics-Aware BERT (2020.coling-main)

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Challenge: Sentence matching aims to determine the special relationship between two sentences.
Approach: They propose to integrate syntactic and semantic information into BERT with sentence matching by using an implicit integration method that is less sensitive to the output structure information.
Outcome: The proposed method achieves state-of-the-art or competitive performance on several sentence matching datasets.
GLoCIM: Global-view Long Chain Interest Modeling for news recommendation (2025.coling-main)

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Challenge: Recent efforts to extract local subgraph information from click graphs have hindered collaboratively utilizing global click graph information.
Approach: They propose a global-view long chain interests model that models a click graph with neighbor interest to enhance news recommendation.
Outcome: The proposed method surpasses baseline methods on two real-world datasets.
Optimizing RAG Rerankers with LLM Feedback via Reinforcement Learning (2026.acl-long)

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Challenge: Current reranking models are optimized on static human annotations in isolation, decoupled from the downstream generation process.
Approach: They propose a reinforcement learning framework that directly aligns reranking with LLM's generation quality.
Outcome: Experiments on knowledge-intensive benchmarks show that RRPO outperforms strong baselines.
Unsupervised Neural Machine Translation with Weight Sharing (P18-1)

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Challenge: Unsupervised neural machine translation (NMT) is a new approach for machine translation . the model uses only one shared encoder to map pairs of sentences from different languages to a shared-latent space .
Approach: They propose an unsupervised approach which trains the model without labeling data . they propose two independent encoders but share some partial weights to extract high-level representations of input sentences.
Outcome: The proposed approach achieves significant improvements on English-German, English-French and Chinese-to-English translation tasks.
OpenForecast: A Large-Scale Open-Ended Event Forecasting Dataset (2025.coling-main)

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Challenge: Existing closed-ended event forecasting methods are constrained by a limited answer space.
Approach: They introduce OpenForecast, a large-scale open-ended dataset with three open-ending event forecasting tasks and an automatic LLM-based method for complex events.
Outcome: The proposed method can be used to evaluate the ability of complex event forecasting of large language models.
Mapping the Minds of LLMs: A Graph-Based Analysis of Reasoning LLMs (2025.emnlp-main)

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Challenge: Large Reasoning Models (LRMs) often display unstable behaviors, e.g., hallucinating unsupported premises, overthinking simple tasks, and displaying higher sensitivity to prompt variations.
Approach: They propose a graph-based analytical framework that clusters long, verbose CoT outputs into semantically coherent reasoning steps, then constructs directed reasoning graphs to capture contextual and logical dependencies among these steps.
Outcome: The proposed framework enables quantitative evaluation of internal reasoning structure and quality beyond conventional metrics and provides practical insights for prompt engineering and cognitive analysis of LLMs.
Rationalizing Medical Relation Prediction from Corpus-level Statistics (2020.acl-main)

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Challenge: Existing work on predicting relations based on text corpus has focused on analyzing raw texts mentioning two entities.
Approach: They propose a framework that can be used to rationalize medical relation prediction . they recall contexts associated with the target entities and recognize relational interactions between them .
Outcome: The proposed framework can achieve competitive predictive performance against a comprehensive list of neural baseline models, and present rationales to justify its prediction.
N24News: A New Dataset for Multimodal News Classification (2022.lrec-1)

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Challenge: Current news datasets focus on text features and rarely leverage the feature of images.
Approach: They propose a news dataset that uses both images and text to achieve better news classification.
Outcome: The proposed model improves on the existing dataset N24News with text and image information.
Decentralized Arena: Towards Democratic and Scalable Automatic Evaluation of Language Models (2026.acl-long)

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Challenge: closed-ended question-based benchmarks struggle with saturation as newer models emerge . crowd-sourced leaderboards rely on costly and slow human judges .
Approach: They propose a framework that leverages collective intelligence from all large language models to evaluate each other.
Outcome: a new framework enables a democratic, pairwise evaluation of all large language models . it achieves 97% correlation with human judgements, while significantly reducing the cost.
Argumentation Mining on Essays at Multi Scales (2020.coling-main)

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Challenge: Argumentation mining on essays is a new task in natural language processing.
Approach: They propose a multi-scale argumentation mining model which aims to identify the types and locations of argumentation components from essay text.
Outcome: The proposed model outperforms existing models on mining all types of argumentation components on the Persuasive Essay dataset.
Diversify Question Generation with Continuous Content Selectors and Question Type Modeling (2020.findings-emnlp)

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Challenge: Existing methods to generate questions based on answers and relevant contexts are not suitable for all questions .
Approach: They propose a method to generate questions from a given answer and its relevant context.
Outcome: The proposed method achieves a better trade-off between generation quality and diversity compared with existing approaches.
ExpertIVS: Sociological Expert Driven Individual Value Simulation in Large Language Models (2026.findings-acl)

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Challenge: Existing methods for social simulations mechanically stitch survey responses into prompts, which suffer from semantic fragmentation, failing to capture the internal coherence of human value systems.
Approach: They propose a framework employing 14 Sociological Expert Agents to interpret World Values Survey responses through structured professional perspectives rather than direct responses concatenation.
Outcome: Experiments on 480 individuals from 12 countries show that ExpertIVS outperforms baselines in value generalization and significantly outperfies the existing methods.
E-NER: Evidential Deep Learning for Trustworthy Named Entity Recognition (2023.findings-acl)

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Challenge: Named entity recognition (NER) systems focus on improving model performance, ignoring the need to quantify model uncertainty.
Approach: They propose to introduce two uncertainty-guided loss terms to the conventional EDL and a series of uncertainty-guiding training strategies to solve these challenges.
Outcome: The proposed method achieves better OOV/OOD detection performance and generalization ability on OOV entities compared to state-of-the-art methods.
CrowdAgent: Multi-Agent Managed Multi-Source Annotation System (2025.emnlp-demos)

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Challenge: Recent approaches to annotate data focus on labeling, but lack holistic process control . a novel system that integrates task assignment, data annotation, and quality/cost management is needed .
Approach: They propose a multi-agent system that integrates task assignment, data annotation, and quality/cost management.
Outcome: The proposed system automates human management by using a collaborative multi-agent system.
A Prospective-Performance Network to Alleviate Myopia in Beam Search for Response Generation (C18-1)

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Challenge: Existing methods to generate responses using beam search focus on current optimal results.
Approach: They propose a beam search method that uses a Prospective-Performance Network to predict the future reward of a partially-generated response.
Outcome: The proposed method can increase the quality and diversity of generated responses with high inference efficiency.
ChartM3: A Multi-Stage Code-Driven Pipeline for Constructing Multi-Dimensional and Multi-Step Visual Reasoning Data in Chart Comprehension (2025.findings-emnlp)

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Challenge: Currently, research on complex chart understanding tasks is limited . a pipeline for visual reasoning datasets addresses these limitations .
Approach: They propose a code-driven pipeline for generating visual reasoning datasets . pipeline integrates retrieval-augmented generation to retrieve professional chart templates .
Outcome: The proposed pipeline enhances chart diversity and data quality through model-based evaluation.
Reasoning with Language Model is Planning with World Model (2023.emnlp-main)

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Challenge: Large language models (LLMs) have shown remarkable reasoning capabilities, particularly with Chain-of-Thought-style prompts.
Approach: They propose a framework that repurposes the LLM as both a world model and a reasoning agent and incorporates a principled planning algorithm (based on Monte Carlo Tree Search)
Outcome: The proposed framework repurposes the LLM as both a world model and a reasoning agent and incorporates a principled planning algorithm (based on Monte Carlo Tree Search) it achieves optimum balance between exploration and exploitation, while achieving high-reward reasoning paths efficiently.
Anchoring-Guidance Fine-Tuning (AnGFT): Elevating Professional Response Quality in Role-Playing Conversational Agents (2025.emnlp-main)

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Challenge: Large Language Models (LLMs) have demonstrated significant advancements in various fields, notably in Role-Playing Conversational Agents (RPCAs).
Approach: They propose an Anchoring-Guidance Fine-Tuning Framework to integrate relevant expert knowledge into RPCAs' training process to mitigate this issue.
Outcome: The proposed framework significantly improves the RPCAs’ performance in handling role-specific professional queries while preserving their robust role-playing abilities.
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.
R2F: A General Retrieval, Reading and Fusion Framework for Document-level Natural Language Inference (2022.emnlp-main)

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Challenge: Document-level natural language inference (DOCNLI) is a new task in natural language processing.
Approach: They propose a document-level natural language inference framework that fuses sentence-level tasks into a set of sentence-based tasks.
Outcome: The proposed framework improves interpretability and performance with evidence.
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.
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.
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.
UltraEval-Audio: A Unified Framework for Comprehensive Evaluation of Audio Foundation Models (2026.acl-demo)

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Challenge: Existing evaluation frameworks for audio foundation models are heavily reliant on English, making it difficult to objectively assess models’ performance on Chinese.
Approach: They propose a unified framework that supports 10 languages, 14 task categories, 24 models, and 36 benchmarks with one-command evaluation and real-time leaderboards.
Outcome: The proposed framework supports 10 languages, 14 task categories, 24 models, and 36 benchmarks with one-command evaluation and real-time leaderboards.
MTVQA: Benchmarking Multilingual Text-Centric Visual Question Answering (2025.findings-acl)

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Challenge: Text-Centric Visual Question Answering (TEC-VQA) is a text-centric visual task understanding tool.
Approach: They introduce a benchmark that features human expert annotations across 9 languages . they prioritize the text in question-answer pairs while disregarding visual text in images .
Outcome: The proposed benchmarks prioritize the text in question-answer pairs while disregarding visual text in images.
Metacognitive Self-Correction for Multi-Agent System via Prototype-Guided Next-Execution Reconstruction (2026.findings-acl)

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Challenge: Large Language Model based multi-agent systems (MAS) excel at collaborative problem solving but remain brittle to cascading errors.
Approach: They propose a metacognitive framework that enables step-level error detection and self-correction in Large Language Model based multi-agent systems (MAS) .
Outcome: The proposed framework outperforms baselines on the Who When benchmark and delivers consistent gains on AgentErrorBench.
PCEE-BERT: Accelerating BERT Inference via Patient and Confident Early Exiting (2022.findings-naacl)

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Challenge: Pre-trained language models (PLMs) are the state-of-the-art (SOTA) models for natural language processing (NLP).
Approach: They propose a patient and confident early exiting BERT (PCEE-BERT) that can work with different PLMs and popular model compression methods.
Outcome: The proposed method outperforms existing models on the GLUE benchmarks and achieves different speed-up ratios.
MathSight: A Benchmark Exploring Have Vision-Language Models Really Seen in University-Level Mathematical Reasoning? (2026.acl-long)

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Challenge: Existing benchmarks rarely isolate how much visual information contributes to reasoning . a growing collection of benchmarks has catalyzed rapid progress in multimodal reasoning - but how much it contributes remains unclear .
Approach: They propose a university-level multimodal mathematical reasoning benchmark to quantify the effect of visual input.
Outcome: The proposed benchmark disentangles and quantifies the effect of visual input on multimodal reasoning models.
Beyond Logits: Aligning Feature Dynamics for Effective Knowledge Distillation (2025.acl-long)

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Challenge: Knowledge distillation (KD) compresses large language models into lightweight versions called student models.
Approach: They propose to align the entire feature dynamics between teacher and student models by using two additional loss terms to achieve this.
Outcome: The proposed method matches the entire feature dynamics between teacher and student models rather than just the final states.
Parameter-Efficient Cross-lingual Transfer of Vision and Language Models via Translation-based Alignment (2023.findings-emnlp)

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Challenge: Existing cross-lingual transfer methods that use labeled data and linguistic resources would consume excessive resources for a large number of languages.
Approach: They propose a parameter-efficient cross-lingual transfer learning framework that utilizes a translation-based alignment method to mitigate multilingual disparities.
Outcome: The proposed framework reduces disparities among languages and improves cross-lingual transfer results in low-resource scenarios while keeping and fine-tuning only a small number of parameters.
In Prospect and Retrospect: Reflective Memory Management for Long-term Personalized Dialogue Agents (2025.acl-long)

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Challenge: Existing approaches to long-term dialogue memory management fail to capture the natural semantic structure of conversations, leading to fragmented and incomplete representations.
Approach: They propose a mechanism that integrates forward- and backward-looking reflections into a personalized memory bank for effective future retrieval.
Outcome: The proposed mechanism outperforms state-of-the-art benchmarks on a long-term dialogue memory model.
Multimodal Fusion with Co-Attention Networks for Fake News Detection (2021.findings-acl)

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Challenge: Existing methods to detect fake news with textual and visual contents are ineffective because they concatenate unimodal features without considering inter-modality relations.
Approach: They propose to fuse textual and visual features for fake news detection using multimodal co-attention networks to learn inter-dependencies between multimodal features.
Outcome: Extensive experiments on two realworld datasets show that the proposed network outperforms state-of-the-art methods and learns inter-dependencies among multimodal features.
Multi-Level Cross-Modal Alignment for Speech Relation Extraction (2024.emnlp-main)

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Challenge: Existing studies use synthetic speech to train and evaluate SpeechRE models, hindering their development . modality gap issue limits performance of existing models, limiting future researches .
Approach: They propose to use speech data to train and evaluate SpeechRE models by using real speech . they propose to train a cross-modal alignment model to bridge the modality gap .
Outcome: The proposed model can train to bridge the modality gap between speech encoder and text decoder . the proposed model is based on two real SpeechRE datasets .
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.
Dynamic Rewarding with Prompt Optimization Enables Tuning-free Self-Alignment of Language Models (2024.emnlp-main)

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Challenge: Empirical evaluations on eight recent LLMs reveal that DRPO significantly enhances alignment performance, enabling base models to outperform their SFT/RLHF-tuned counterparts.
Approach: They propose a tuning-free approach to self-alignment called Dynamic Rewarding with Prompt Optimization (DRPO) it leverages a dynamic rewarding mechanism to identify and rectify alignment weaknesses .
Outcome: The proposed approach outperforms existing methods and is highly adaptable to various alignment challenges.
Stepwise Perplexity-Guided Refinement for Efficient Chain-of-Thought Reasoning in Large Language Models (2025.findings-acl)

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Challenge: Chain-of-Thought (CoT) reasoning has improved the performance of large language models (LLMs) however, the detailed reasoning process in CoT often incurs long generation times and high computational costs due to the inclusion of unnecessary steps.
Approach: They propose a method to identify critical reasoning steps using perplexity as a measure of their importance.
Outcome: The proposed method achieves a better balance between reasoning accuracy and efficiency of CoT.
Beyond Yes and No: Improving Zero-Shot LLM Rankers via Scoring Fine-Grained Relevance Labels (2024.naacl-short)

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Challenge: Existing pointwise LLMs provide noisy or biased answers for documents that are partially relevant to the query.
Approach: They propose to incorporate fine-grained relevance labels into the LLM prompt . they propose to better differentiate between documents with different levels of relevance .
Outcome: The proposed model can differentiate between documents with different levels of relevance to the query and derive a more accurate ranking.
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 .
ProLongVid: A Simple but Strong Baseline for Long-context Video Instruction Tuning (2025.emnlp-main)

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Challenge: Existing approaches to adapt image-focused models for video understanding have not been successful in analyzing long video sequences.
Approach: They propose a video instruction dataset that outperforms existing video instruction data for fine-tuning MLLMs by incrementally increasing input context length.
Outcome: The proposed model outperforms existing models on video benchmarks and outperformed proprietary models on VideoMME even with a compact 7B model.
TRUST: Towards Robust Social Bot Detection via Uncertainty-Guided Pseudo-Labeling and Graph Structure Purification (2026.findings-acl)

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Challenge: Existing graph-based detection models are vulnerable to deceptive message propagation, where bots deliberately interact with legitimate users.
Approach: They propose a framework to mitigate deceptive message propagation by node-level uncertainty estimation and graph structure purification.
Outcome: The proposed framework improves on three benchmark datasets and six GNN backbones on real-world social bots.
LLM-based Rumor Detection via Influence Guided Sample Selection and Game-based Perspective Analysis (2025.acl-long)

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Challenge: Existing methods for rumor detection on social media are limited by limited modeling capacity and insufficient training corpora.
Approach: They propose an SFT-based rumor detection model with Influence guided Sample selection and Game-based multi-perspective analysis to address these issues.
Outcome: The proposed model outperforms existing SOTA on three datasets.
ThinkSum: Probabilistic reasoning over sets using large language models (2023.acl-long)

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Challenge: Large language models (LLMs) have a substantial capacity for high-level analogical reasoning, but they fail in scenarios that require reasoning over multiple objects or facts and making sequences of logical deductions.
Approach: They propose a two-stage probabilistic inference paradigm, ThinkSum, which reasons over sets of objects or facts in a structured manner.
Outcome: The proposed paradigm improves on the BIG-bench suite of evaluation tasks.
Noise-Robust Fine-Tuning of Pretrained Language Models via External Guidance (2023.findings-emnlp)

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Challenge: Pretrained Language Models (PLMs) are advanced but data labels are noisy due to the complex annotation process.
Approach: They propose a framework for fine-tuning PLMs using noisy labels that incorporates guidance from Large Language Models like ChatGPT.
Outcome: Experiments on synthetic and real-world noisy datasets show that the proposed framework outperforms the state-of-the-art framework.
Active Learning for Abstractive Text Summarization via LLM-Determined Curriculum and Certainty Gain Maximization (2024.findings-emnlp)

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Challenge: Abstractive text summarization (ATS) requires laborious data annotation and time-consuming model training.
Approach: They propose a novel active learning framework that asks large language models to rate difficulty of instances and then uses certainty gain maximization to select instances with a distribution that aligns well with the overall distribution.
Outcome: The proposed framework improves stability, effectiveness, and efficiency of abstractive text summarization backbones.
HyperIDP: Customizing Temporal Hypergraph Neural Networks for Multi-Scale Information Diffusion Prediction (2025.coling-main)

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Challenge: Existing studies on information diffusion prediction have focused on both macroscopic and microscopic scales.
Approach: They propose a hypergraph-based model that manages both macroscopic and microscopic diffusion predictions.
Outcome: The proposed model outperforms baseline models on both macroscopic and microscopic tasks.
DVMap: Fine-Grained Pluralistic Value Alignment via High-Consensus Demographic-Value Mapping (2026.acl-long)

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Challenge: Current Large Language Models (LLMs) rely on coarse-grained national labels for pluralistic value alignment.
Approach: They propose a framework for fine-grained pluralistic value alignment using demographic constraints.
Outcome: The proposed framework can identify groups with predictable, high-consensus value preference . it achieves 48.6% accuracy, surpassing open-source LLM DeepSeek-v3.2 .
PLATO-XL: Exploring the Large-scale Pre-training of Dialogue Generation (2022.findings-aacl)

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Challenge: Experimental results show PLATO-XL achieves state-of-the-art results across multiple conversational tasks.
Approach: They propose to train PLATO-XL models with up to 11 billion parameters, trained on Chinese and English social media conversations.
Outcome: The proposed model achieves state-of-the-art on multiple conversational tasks, verifying its potential as a foundation model of conversational AI.
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.
Proactive Human-Machine Conversation with Explicit Conversation Goal (P19-1)

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Challenge: Typical human-machine conversation systems only use utterances and responses as training data, which results in uninformative and inappropriate responses.
Approach: They propose a dataset where one acts as a conversation leader and the other as 'follower' they establish baseline results on a 270K utterances and 30k dialogues dataset using state-of-the-art models.
Outcome: The proposed model can generate diverse multi-turn conversations using knowledge from a new dataset .
Double-Edged Sword or Sharp Tool? Designing and Evaluating Triadic LLM-Teacher Collaboration for K-12 Writing at Scale (2026.findings-acl)

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Challenge: a large-scale empirical dataset involving 57,954 essays from 10,195 students across 120 schools over two years is presented in this paper.
Approach: They propose a triadic collaboration system that supports K-12 writing learning . they propose linguistic expansion as a pedagogical gatekeeper and bridge .
Outcome: The proposed system improves writing quality through a strategic labor division . authors find that excessive linguistic expansion yields diminishing marginal utility .
From Curated Data to Scalable Models: Continual Pre-training of Dense and MoE Large Language Models for Tibetan (2026.acl-long)

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Challenge: Large language models have achieved remarkable success across a wide range of tasks, yet their performance remains heavily biased toward high-resource languages.
Approach: They propose a pipeline for advancing Tibetan language modeling through multilingual continual pre-training with Tibetan, Chinese, and English.
Outcome: The proposed model outperforms open-source and Tibetan-focused models on diverse tasks.
IMCI: Integrate Multi-view Contextual Information for Fact Extraction and Verification (2022.coling-1)

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Challenge: Existing models for fact extraction and verification fail to utilize multi-view contextual information.
Approach: They propose to integrate multi-view contextual information (IMCI) for fact extraction and verification by combining contextual information with inter-document context.
Outcome: The proposed framework achieves state-of-the-art performance on the open-domain Wikipedia task with a winning FEVER score of 73.96% and label accuracy of 77.25% on the online blind test set.
Is Chain-of-Thought Reasoning of LLMs a Mirage? A Data Distribution Lens (2026.findings-acl)

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Challenge: Chain-of-Thought (CoT) prompting has been shown to be effective in eliciting structured reasoning from large language models (LLMs).
Approach: They propose a data distribution lens to understand when and why CoT reasoning fails . they propose 'data-based' training that trains LLMs from scratch .
Outcome: The proposed model enables models to generate reasoning trajectories that approximate those observed during training.
Speech-Hands: A Self-Reflection Voice Agentic Approach to Speech Recognition and Audio Reasoning with Omni Perception (2026.acl-long)

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Challenge: naively fine-tuning an omni-model on speech recognition and external sound understanding tasks often degrades performance . Xie and Wu's framework, Speech-Hands, recasts the problem as an explicit self-reflection decision.
Approach: They propose a voice-agentic framework that learns one critical omni-understanding skill: trusting itself versus external audio perception.
Outcome: The proposed framework outperforms baseline models on the OpenASR leaderboard by 12.1% WER and high F1 on audio QA decisions.
A General Framework to Enhance Fine-tuning-based LLM Unlearning (2025.findings-acl)

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Challenge: Existing approaches to remove copyrighted and privacy-sensitive data from Large Language Models (LLMs) have been proposed to remove specific data from LLMs without requiring full retraining.
Approach: They propose a general framework that enhances the utility of fine-tuning-based methods by distinguishing target data and suppressing related generations.
Outcome: The proposed framework improves the unlearning and utility of fine-tuning-based methods by distinguishing the target data and suppressing related generations.
Vulnerability of LLMs to Vertically Aligned Text Manipulations (2025.acl-long)

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Challenge: Recent research shows that vertical text input significantly degrades the accuracy of large language models (LLMs) in text classification tasks.
Approach: They investigate the impact of vertical text input on the performance of LLMs . they find that chain of thought reasoning does not help LLM recognize vertical input .
Outcome: The proposed model can significantly mislead models, posing a risk of bypassing detection in real-world scenarios involving harmful or sensitive information.
Learning from Diverse Reasoning Paths with Routing and Collaboration (2025.emnlp-main)

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Challenge: Recent studies suggest that the reasoning abilities of large language models (LLMs) grows with model size and pre-training data.
Approach: They propose to combine quality filtering, conditional routing, and cooperative peer teaching to transfer knowledge from powerful teacher models to compact and transparent students.
Outcome: Experiments show that QR-Distill is superior to traditional methods.
LLMRouterBench: A Massive Benchmark and Unified Framework for LLM Routing (2026.findings-acl)

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Challenge: Large language model (LLM) routing assigns each query to the best suitable model from an ensemble.
Approach: They introduce a large-scale benchmark and unified framework for LLM routing . they find that many routing methods exhibit similar performance under unified evaluation .
Outcome: The proposed benchmark provides comprehensive metrics for both performance-oriented and performance-cost trade-off routing.
CausalGaze: Unveiling Hallucinations via Counterfactual Graph Intervention in Large Language Models (2026.findings-acl)

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Challenge: Existing classification-based methods capture noise and spurious correlations while overlooking the underlying causal mechanisms.
Approach: They propose a hallucination detection framework based on structural causal models that captures static and passive signals from internal states and employs counterfactual interventions to disentangle causal reasoning paths from incidental noise.
Outcome: Experiments on four datasets and three widely used LLMs show that the proposed framework improves AUROC and interpretability.
Jointly Identifying Rhetoric and Implicit Emotions via Multi-Task Learning (2021.findings-acl)

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Challenge: Experimental results validate the benefit of the proposed model over the state-of-the-art baselines for rhetoric and emotion identification tasks.
Approach: They propose a multi-task learning framework that can encode categorical correlation between tasks to improve rhetoric and emotion identification problem.
Outcome: The proposed model can encode the categorical correlation between tasks to improve rhetoric and emotion identification problem.
Chinese Opinion Role Labeling with Corpus Translation: A Pivot Study (2021.emnlp-main)

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Challenge: Unlike most of the previous work focusing on the English language, this paper focuses on the Chinese ORL task.
Approach: They propose to use a standard English MPQA dataset to construct a Chinese ORL dataset and investigate the effectiveness of cross-lingual transfer methods.
Outcome: The proposed method is able to detect and improve the performance of the proposed method in Chinese.
Consolidating Ranking and Relevance Predictions of Large Language Models through Post-Processing (2024.emnlp-main)

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Challenge: Existing approaches to generate relevance labels for large language models have not been successful in generating relevance labels.
Approach: They propose a method to combine LLM relevance labels with ranking abilities . they take both LLM generated relevance labels and pairwise preferences .
Outcome: The proposed method balances the ranking and labeling abilities of large language models . it takes both LLM generated relevance labels and pairwise preferences .
Constructing Your Model’s Value Distinction: Towards LLM Alignment with Anchor Words Tuning (2025.findings-emnlp)

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Challenge: a study of large language models (LLMs) shows that they can generate outputs that are honest, positive, harmless, etc.
Approach: They propose a method that amplifies logits difference between positive and negative tokens . they propose to use the logits gap to generate positive and positive tokens after alignment .
Outcome: The proposed method achieves effective alignment, but requires fewer computational resources compared to training-time alignment methods.
HMoE: Heterogeneous Mixture of Experts for Language Modeling (2025.emnlp-main)

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Challenge: Mixture of Experts (MoE) models use homogeneous experts with diverse capacities, resulting in a lack of expert specialization and parameter utilization.
Approach: They propose a framework where experts differ in size and possess diverse capacities . they propose HMoE to encourage frequent activation of smaller experts .
Outcome: The proposed framework outperforms homogeneous homogenous MoE models on evaluation benchmarks and achieves lower loss rate with fewer activated parameters.
RECAL: Sample-Relation Guided Confidence Calibration over Tabular Data (2023.findings-emnlp)

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Challenge: Various machine learning methods for tabular data lack accurate confidence estimation, which is needed for high-risk sensitive applications such as credit modeling and financial fraud detection.
Approach: They propose a general post-training confidence calibration framework to calibrate the confidence of current machine learning models by employing graph neural networks to model the relationships between different samples.
Outcome: The proposed framework improves the confidence estimation on tabular datasets by using graph neural networks to model the relationships between different samples.
Sign2Vis: Automated Data Visualization from Sign Language (2025.findings-acl)

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Challenge: Existing methods to translate natural language descriptions into visualization queries focus on spoken languages, not sign languages.
Approach: They propose a sign language interface that enables the DHH community to engage more fully with data analysis.
Outcome: The proposed interface can be used by the deaf and hard-of-hearing community.
LiPO: Listwise Preference Optimization through Learning-to-Rank (2025.naacl-long)

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Challenge: Recent work on language models with curated feedback provides promising alternatives to RLHF . multiple responses can be ranked by reward models or AI feedback, but there is no study on directly fitting upon a list of responses.
Approach: They propose a method that aligns language models with curated human feedback . they propose SLiC and DPO as promising alternatives to traditional RLHF .
Outcome: The proposed method outperforms DPO and SLiC on several preference alignment tasks with curated and real rankwise preference data.
Glue pizza and eat rocks - Exploiting Vulnerabilities in Retrieval-Augmented Generative Models (2024.emnlp-main)

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Challenge: Retrieval-Augmented Generative (RAG) models enhance Large Language Models (LLMs) by integrating external knowledge bases.
Approach: They propose to exploit openness of RAG models by injecting deceptive content into the retrieval database, intentionally changing the model’s behavior.
Outcome: The proposed model can be exploited through crafted content uploads with access to the retriever.
Answer Quality Aware Aggregation for Extractive QA Crowdsourcing (2022.findings-emnlp)

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Challenge: Existing methods for creating extractive question answering datasets are crowdsourcing, but results are often inconsistent.
Approach: They propose a method for aggregating answers from different crowd workers that takes into account the relations between the answer, question, and context passage.
Outcome: The proposed method outperforms baselines by 16% on precision and effectively conduct answer aggregation for extractive question answering task.
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.
Pre-training with Meta Learning for Chinese Word Segmentation (2021.naacl-main)

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Challenge: Recent studies show that pre-trained models are beneficial to Chinese Word Segmentation (CWS). However, these models lack task-specific prior segmentation knowledge.
Approach: They propose a pre-trained Chinese word segmentation model MetaSeg which incorporates meta learning into a multi-criteria pre-training task.
Outcome: Empirical results show that MetaSeg can achieve new state-of-the-art performance on twelve widely-used CWS datasets and significantly improve model performance in low-resource settings.
Joint Training of Candidate Extraction and Answer Selection for Reading Comprehension (P18-1)

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Challenge: Various advanced neural models have been proposed for reading comprehension, but most models ignore its relations with other answer candidates.
Approach: They propose to model reading comprehension as an extract-then-select two-stage procedure . they first extract answer candidates from passages, then select the final answer by combining information from all candidates.
Outcome: The proposed approach improves state-of-the-art performance on open-domain reading comprehension datasets.
PLaD: Preference-based Large Language Model Distillation with Pseudo-Preference Pairs (2024.findings-acl)

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Challenge: Knowledge distillation (KD) is a technique for transferring expertise from large teacher models to compact student models with reduced memory footprints and inference costs.
Approach: They propose to transfer knowledge from large teacher models to compact student models by exploiting teacher-student capacity discrepancies to generate pseudo-preference pairs where teacher outputs are preferred over student outputs.
Outcome: The proposed framework exploits teacher-student capacity discrepancy to generate pseudo-preference pairs where teacher outputs are preferred over student outputs.
GRACE: Gradient-guided Controllable Retrieval for Augmenting Attribute-based Text Generation (2023.findings-acl)

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Challenge: Existing methods for controlling the generation of pre-trained language models infuse domain bias into the generation process, making it difficult to generate out-of-domain texts.
Approach: They propose a retrieval-augmented generation framework that uses retrieval to generate fluent sentences with high attribute relevance.
Outcome: The proposed method can generate fluent sentences with high attribute relevance while keeping domain bias out of the model.
Beyond Inherent Cognition Biases in LLM-Based Event Forecasting: A Multi-Cognition Agentic Framework (2025.findings-emnlp)

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Challenge: Large Language Models exhibit human-like cognitive biases in event forecasting . a human-curated dataset reveals significant cognitive bias in LLMs .
Approach: They propose a human-curated dataset to explore LLMs' cognitive biases . they leverage LLM participants to act as multi-cognition event participants .
Outcome: The proposed framework alleviates cognitive biases in LLMs and offers diverse perspectives.
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.
Where CoT Reasoning Commits: Entropy Traces Identify Interpretable Attention Heads (2026.findings-acl)

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Challenge: a growing body of work suggests a disconnect between the generated rationale and the model's actual choice.
Approach: They propose a mechanism-aware framework that interprets the evolving "choice state" of attention heads during CoT generation . they identify a set of intervention targets and perform Selective Head Fine-Tuning .
Outcome: The proposed framework interprets the "choice state" of attention heads during CoT generation . it detects two functional behaviors: Steadfast Heads and Wavering Heads .
From Query to Logic: Ontology-Driven Multi-Hop Reasoning in LLMs (2026.findings-acl)

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Challenge: Large Language Models (LLMs) exhibit limitations in complex multi-hop question answering tasks that necessitate non-linear, structured reasoning.
Approach: They propose an ontology-driven reasoning and chain framework that combines LLMs’ generative capabilities with the structural benefits of knowledge graphs.
Outcome: Extensive experiments across a diverse set of models and standard MQA benchmarks demonstrate that the proposed framework achieves competitive performance while producing more interpretable reasoning chains.
When LLMs Read Tables Carelessly: Measuring and Reducing Data Referencing Errors (2026.acl-long)

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Challenge: Large language models (LLMs) perform well on table tasks, but they still make data referencing errors (DREs) prior studies have only offered limited, small-scale analyses.
Approach: They propose inference-time strategies and lightweight critics to mitigate data referencing errors.
Outcome: The proposed model achieves an average F1 score of 78.2% in detecting both in-distribution and out-of-difference DREs and assists inference for larger models.
Improving Neural Machine Translation with Conditional Sequence Generative Adversarial Nets (N18-1)

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Challenge: Experimental results show that the proposed model consistently outperforms the traditional RNNSearch and the newly emerged state-of-the-art Transformer on English-German and Chinese-English translation tasks.
Approach: They propose an approach for applying GANs to NMT by building a conditional sequence generative adversarial net with two adversarials.
Outcome: The proposed model outperforms the existing RNNSearch and Transformer on English-German and Chinese-English translation tasks.
RAGLAB: A Modular and Research-Oriented Unified Framework for Retrieval-Augmented Generation (2024.emnlp-demo)

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Challenge: Existing research on Retrieval Augmented Generation (RAG) does not address the problem of hallucinations and real-time updating of knowledge.
Approach: They propose a modular open-source library to equip LLMs with external knowledge.
Outcome: The proposed approach reduces the need for expensive open-source tools and lacks fair comparisons between novel RAG algorithms.
UniCorn: Towards Self-Improving Unified Multimodal Models through Self-Generated Supervision (2026.acl-long)

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Challenge: Unified Multimodal Models have achieved remarkable success in cross-modal comprehension, but a gap persists in their ability to translate internal knowledge into faithful and controllable synthesis.
Approach: They propose a self-improvement framework that partitions a single UMM into three collaborative roles: Proposer, Solver, and Judge.
Outcome: The proposed framework improves on TIIF, DPG, CompBench and UniCycle benchmarks.
Domain-Specific Data Generation Framework for RAG Adaptation (2026.findings-acl)

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Challenge: Retrieval-Augmented Generation (RAG) combines the language understanding and reasoning capabilities of large language models (LLMs) with external retrieval to produce domain-grounded responses.
Approach: They propose a scalable and modular data-centric framework for generating domain-grounded question–answer–context triples tailored to diverse RAG adaptation strategies.
Outcome: The proposed framework generates domain-grounded question–answer–context triples for multiple RAG adaptation strategies.
FocalOrder: Focal Preference Optimization for Reading Order Detection (2026.acl-long)

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Challenge: Existing methods for document comprehension rely on uniform supervision, resulting in a performance degradation in the intermediate sections.
Approach: They propose a framework driven by Focal Preference Optimization to detect reading order in document layouts.
Outcome: The proposed framework outperforms competing baselines and surpasses large-scale general VLMs.
LLaSE-G1: Incentivizing Generalization Capability for LLaMA-based Speech Enhancement (2025.acl-long)

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Challenge: Recent advances in language models have demonstrated strong capabilities in semantic understanding and contextual modeling.
Approach: They propose a LLaMA-based language model that incentivizes generalization capabilities for speech enhancement.
Outcome: The proposed language model outperforms prior task-specific discriminative and generative models in acoustic enhancement tasks.
Entity Tracking via Effective Use of Multi-Task Learning Model and Mention-guided Decoding (2023.eacl-main)

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Challenge: State-of-the-art entity tracking approaches either design complicated model architectures or rely on task-specific pre-training to achieve good results.
Approach: They propose a multi-task learning-enabled entity tracking approach that utilizes knowledge gained from general domain tasks to improve entity tracking.
Outcome: The proposed approach achieves state-of-the-art on two popular entity tracking datasets, even though it does not require any task-specific architecture design or pre-training.
Large Language Models are Effective Text Rankers with Pairwise Ranking Prompting (2024.findings-naacl)

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Challenge: Existing methods to rank documents using large language models do not understand these challenging ranking formulations.
Approach: They propose to use Pairwise Ranking Prompting to improve ranking performance . they propose to outperform fine-tuned baseline rankers on benchmark datasets .
Outcome: The proposed technique outperforms supervised baselines on benchmark datasets and outperformed other LLM-based solutions by over 10% on average.
LSDSCC: a Large Scale Domain-Specific Conversational Corpus for Response Generation with Diversity Oriented Evaluation Metrics (N18-1)

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Challenge: Existing evaluation metrics for NRG models can't measure semantic relevance and diversity of generated results.
Approach: They propose a large-scale domain-specific conversational corpus with preprocessing and cleansing procedures for model training and a testing set for measuring the diversity of generated results.
Outcome: The proposed corpus can be taken as a new benchmark dataset for the NRG task.
SQL-Trail: Multi-Turn Reinforcement Learning with Interleaved Feedback for Text-to-SQL (2026.acl-long)

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Challenge: Recent large language models (LLMs) have significantly improved Text-to-SQL generation, but a gap remains between AI systems and human experts on challenging benchmarks such as BIRD-Sql.
Approach: They propose a multi-turn reinforcement learning agentic framework for Text-to-SQL that uses execution feedback to iteratively refine its predictions.
Outcome: The proposed framework outperforms proprietary systems on 7B and 14B models by **5% on average, underscoring the effectiveness of interactive, agentic workflows for robust Text-to-SQL generation.
Unveiling Privacy Risks in LLM Agent Memory (2025.acl-long)

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Challenge: Large Language Model (LLM) agents store private user-agent interactions in memory for demonstrations, introducing new privacy risks for LLM agents.
Approach: They propose an attack that extracts private information from memory under a black-box setting and propose a method that can be used to attack the agent.
Outcome: The proposed attack is effective under a black-box setting and it is demonstrated on two representative agents.
Semi-Supervised Disfluency Detection (C18-1)

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Challenge: Detecting disfluency can be difficult because of the flexible nature of reparandum structure and the lack of a nested structure.
Approach: They propose a semi-supervised approach which extracts hidden features from self-attention without any Recurrent Neural Network (RNN) or Convolutional Neural Net (CNN).
Outcome: The proposed approach improves over baselines by using unlabelled data . identifying and removing non-fluent factors would help to improve spontaneous speech quality .
UNO Arena for Evaluating Sequential Decision-Making Capability of Large Language Models (2024.emnlp-main)

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Challenge: Existing LLMs demonstrate powerful capabilities between tasks, but can they make sequential decisions?
Approach: They propose to evaluate sequential decision-making capability of large language models (LLMs) using novel metrics based Monte Carlo methods.
Outcome: The proposed benchmark improves sequential decision-making performance compared to the vanilla LLM player.
AnyMAC: Cascading Flexible Multi-Agent Collaboration via Next-Agent Prediction (2025.emnlp-main)

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Challenge: Existing methods for multi-agent collaboration rely on static or graph-based topologies lacking flexibility and adaptability.
Approach: They propose a new framework that rethinks multi-agent coordination through a sequential structure rather than a graph structure.
Outcome: The proposed method achieves superior performance while significantly reducing communication overhead.
ManCC: A Task-Anchored Benchmark for Manchu–Classical Chinese Cross-Lingual Modeling (2026.findings-acl)

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Challenge: Mainstream research in natural language processing has focused on high-resource and modern languages.
Approach: They propose a task-anchored benchmark for Manchu–Classical Chinese translation . they use a parallel corpus of 16,627 sentence pairs to evaluate the model .
Outcome: The proposed benchmarks show that linguistic differences influence performance and broader language coverage facilitate low-resource transfer.
Coherence boosting: When your pretrained language model is not paying enough attention (2022.acl-long)

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Challenge: Long-range semantic coherence remains a challenge in automatic language generation and understanding.
Approach: They propose a procedure that increases a model’s focus on a long context by distributional analyses of generated ordinary text and dialog responses.
Outcome: The proposed procedure increases the model's focus on a long context.
D4: a Chinese Dialogue Dataset for Depression-Diagnosis-Oriented Chat (2022.emnlp-main)

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Challenge: Existing human-machine dialogue systems are not able to provide diagnostic information for depression diagnosis due to stigma associated with mental illness.
Approach: They propose to construct a Chinese Dialogue Dataset for depression-diagnosis-oriented chat based on clinical depression diagnostic criteria.
Outcome: The proposed system can be used to diagnose depression using a Chinese Dialogue Dataset.
Search to Pass Messages for Temporal Knowledge Graph Completion (2022.findings-emnlp)

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Challenge: Recent studies on missing facts in temporal knowledge graphs are based on hand-designed architectures and fail to explore the diverse topological and temporal properties of TKGs.
Approach: They propose to use neural architecture search to design a data-specific message passing architecture for TKG completion.
Outcome: The proposed architectures achieve the state-of-the-art performance on three benchmark datasets.
Benchmarking the Fine-Grained Discriminability in Image-Text Retrieval via Controlled Contrastive Differences (2026.findings-acl)

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Challenge: Existing cross-modal image-text retrieval models often retrieve samples with inconsistent details.
Approach: They propose two fine-grained image-text retrieval benchmarks that incorporate extensive contrastive samples with one controlled contrastive difference from its anchor.
Outcome: Extensive experiments show that contrastive samples can significantly degrade retrieval performance.
Hierarchical Chinese Legal event extraction via Pedal Attention Mechanism (2020.coling-main)

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Challenge: Existing methods for event extraction cannot express connections between arguments, which are crucial in legal events.
Approach: They propose a dynamic event structure for Chinese legal events to distinguish between similar events by hierarchical event features for event detection and a pedal attention mechanism to extract the semantic relation between two words through their dependent adjacent words.
Outcome: The proposed model surpasses state-of-the-art models on a Chinese legal event dataset.
InfoPO: On Mutual Information Maximization for Large Language Model Alignment (2025.naacl-long)

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Challenge: Recent studies have shown that direct preference optimization and its variants can be useful for fine-tuning large language models with human preferences data.
Approach: They propose a preference fine-tuning algorithm that effectively and efficiently aligns large language models using preference data.
Outcome: Extensive experiments show that the proposed algorithm outperforms established baselines on reasoning tasks.
TextHacker: Learning based Hybrid Local Search Algorithm for Text Hard-label Adversarial Attack (2022.findings-emnlp)

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Challenge: Existing textual adversarial attacks use gradient or prediction confidence to generate adversarials, making it hard to be deployed in real-world applications.
Approach: They propose a textual adversarial attack that randomly perturbs lots of words to craft an adversarial example.
Outcome: The proposed attack outperforms existing hard-label attacks in terms of attack performance and adversary quality.
PaRaDe: Passage Ranking using Demonstrations with LLMs (2023.findings-emnlp)

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Challenge: Existing studies show that large language models can be instructed to perform zero-shot passage re-ranking . Existing work like UPR demonstrate promising results for zero- shot ranking using LLMs .
Approach: They propose a demonstration selection strategy based on difficulty rather than semantic similarity . they propose to include only one demonstration in the prompt to improve re-ranking .
Outcome: The proposed method improves LLM-based re-ranking by adding one demonstration to the prompt.
ControversialQA: Exploring Controversy in Question Answering (2024.lrec-main)

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Challenge: Existing studies on controversy define it based on vague assumptions of its relation to sentiment . experimental results show controversy detection is essential and challenging .
Approach: They propose a question-answering dataset that defines content controversy by user perception . they show controversy detection is essential and challenging .
Outcome: The proposed dataset defines controversy by user perception, i.e., votes from plenty of users.
Large Margin Representation Learning for Robust Cross-lingual Named Entity Recognition (2025.acl-long)

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Challenge: Existing approaches to name entity recognition neglect distribution skewness and pseudo-label bias . despite promising results, current approaches neglect these problems .
Approach: They propose a framework that optimizes an adaptively reweighted contrastive loss to handle class skewness and pseudo-label bias.
Outcome: The proposed framework outperforms existing methods on multiple benchmarks.
KC-GenRe: A Knowledge-constrained Generative Re-ranking Method Based on Large Language Models for Knowledge Graph Completion (2024.lrec-main)

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Challenge: Knowledge graph completion (KGC) is a critical task to predict missing facts among entities.
Approach: They propose a knowledge-constrained generative re-ranking method based on generative large language models for KGC that can predict missing facts among entities.
Outcome: The proposed method achieves state-of-the-art performance on four datasets and 9.0% and 11.1% compared to the previous methods.
CompTab: A Comprehensive Benchmark for Real-World TableQA with Complex Reasoning and Irregular Tables (2026.acl-long)

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Challenge: Existing benchmarks focus on well-structured tables and fail to reflect irregular structures and complex reasoning commonly encountered in real-world scenarios.
Approach: They propose a benchmark to evaluate TableQA under complex reasoning and irregular table conditions.
Outcome: The proposed framework improves generalization and realism of large language models under complex and irregular table conditions.
Design First, Code Later: Aesthetically Pleasing Template-Free Slides Generation (2026.findings-acl)

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Challenge: Existing approaches to producing presentation slides rely on fixed templates or executable code . Existing methods rely only on predefined templates and emit executable codes .
Approach: They propose a hierarchical slides generation workflow DeepSlides that organizes slide design tasks without any predefined template or style.
Outcome: The proposed framework outperforms baseline methods on evaluated metrics and achieves superior performance in human preference evaluations.
Large Language Models for Data Annotation and Synthesis: A Survey (2024.emnlp-main)

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Challenge: Existing surveys focus on LLMs' specific utility for data annotation and synthesis.
Approach: They propose to use large language models to generate annotations from raw data . they also propose to review learning strategies for models utilizing LLM-generated annotations .
Outcome: The proposed models can be used to improve the efficacy of machine learning models by generating and labeling raw data with relevant information.
UnifiedVisual: A Framework for Constructing Unified Vision-Language Datasets (2025.emnlp-main)

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Challenge: Existing datasets address understanding and generation in isolation, limiting the performance of unified vision large language models.
Approach: They propose a dataset that facilitates mutual enhancement between multimodal understanding and generation.
Outcome: The proposed framework integrates diverse visual and textual inputs and outputs, enabling comprehensive cross-modal reasoning and precise text-to-image alignment.
Memory or Reasoning? Explore How LLMs Compute Mixed Arithmetic Expressions (2025.findings-acl)

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Challenge: Large language models (LLMs) can solve complex multi-step math reasoning problems, but their internal implementation is limited.
Approach: They propose to use a "C**ausal **E**ffect **D**riven **F**ine-tuning method" to improve LLMs' reasoning ability.
Outcome: The proposed method improves the model's reasoning ability by enhancing key components that are used to execute mixed arithmetic calculations.
Distillation Enhanced Generative Retrieval (2024.findings-acl)

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Challenge: Generative retrieval is a promising new paradigm in text retrieval that generates identifier strings of relevant passages as the retrieval target.
Approach: They propose a framework that leverages generative language models to enhance generative retrieval by distillation.
Outcome: The proposed framework achieves state-of-the-art performance among the generative retrieval methods.
Exploiting Unlabeled Data for Target-Oriented Opinion Words Extraction (2022.coling-1)

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Challenge: Existing methods to extract opinion words from sentences are limited due to the expensive annotation process.
Approach: They propose to exploit massive unlabeled data to reduce distribution shift risk . they propose to use two filters specifically for TOWE to filter noisy data . results indicate superiority of MGCR over current state-of-the-art methods .
Outcome: The proposed method reduces the risk of distribution shifts by increasing the exposure of the model to varying distribution shift.
Logical Structure as Knowledge: Enhancing LLM Reasoning via Structured Logical Knowledge Density Estimation (2026.findings-acl)

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Challenge: Existing data-centric paradigms equate quality with factuality or diversity and ignore the internal logical complexity of training samples.
Approach: They propose a density-aware re-cognizing optimization strategy that prioritizes high-density logical samples to align training with the model's reasoning boundary.
Outcome: The proposed metric outperforms existing methods and improves reasoning performance without increasing total data volume.
Separate the Wheat from the Chaff: Winnowing Down Divergent Views in Retrieval Augmented Generation (2025.emnlp-main)

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Challenge: Large language models (LLMs) lack robustness in knowledge-intensive tasks due to noisy or irrelevant retrieved data.
Approach: They propose a multi-agent debate-based RAG framework that integrates external knowledge sources into large language models to improve their accuracy.
Outcome: The proposed framework is unsupervised and leverages pretrained LLMs without fine-tuning, making it easily adaptable to various tasks.
On-Policy Self-Distillation for Efficient Diffusion Language Models with Early-Stage Calibration (2026.findings-acl)

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Challenge: Recent studies have demonstrated that masked diffusion models (MDMs) can surpass autoregressive models (ARMs) in various tasks.
Approach: They propose a method to calibrate early token predictions without demonstration data by distilling an unnormalized target distribution into the original model.
Outcome: Experiments on math, planning, and RLHF tasks show that COPSD improves both effectiveness and efficiency, and further enhances performance when combined with supervised fine-tuning.
Multi-Agent Autonomous Driving Systems with Large Language Models: A Survey of Recent Advances, Resources, and Future Directions (2025.findings-emnlp)

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Challenge: Large Language Models (LLMs) are used to assist with driving decisions, but they face limitations in perception and computational demands.
Approach: They propose a survey of LLM-based multi-agent ADSs and their applications . they analyze agent-human interactions in scenarios where LLM agents engage with humans .
Outcome: The proposed approach reduces human intervention and improves safety and efficiency.
ASCM: An Answer Space Clustered Prompting Method without Answer Engineering (2022.findings-acl)

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Challenge: Pre-trained language models have shown a great impact on NLP tasks.
Approach: They propose an answer space clustered prompting model and a synonym initialization method that automatically categorizes all answer tokens in a semantic-clustered embedding space.
Outcome: Experiments show that the proposed method outperforms existing state-of-the-art methods in few-shot settings.
Can LLMs See Without Pixels? Benchmarking Spatial Intelligence from Textual Descriptions (2026.findings-acl)

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Challenge: Existing advances in Spatial Intelligence rely on vision-Language Models . however, a critical question remains: does spatial understanding originate from visual encoders?
Approach: They propose to evaluate the SI performance of Large Language Models without pixel-level input.
Outcome: The proposed benchmark challenges large language models to perform symbolic reasoning rather than visual pattern matching.
Unleashing Low-Bit Inference on Ascend NPUs: A Comprehensive Evaluation of HiFloat Formats (2026.acl-industry)

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Challenge: Low-bit floating-point formats like MXFP and NVFP4 offer new opportunities for precision and efficiency.
Approach: They evaluate HiFloat (HiF8 and HiF4), a family of floating-point formats tailored for Ascend NPUs.
Outcome: The proposed formats excel with high-variance data and are compatible with state-of-the-art quantization frameworks.
Incorporating Multimodal Information in Open-Domain Web Keyphrase Extraction (2020.emnlp-main)

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Challenge: Open-domain Keyphrase extraction (KPE) is a fundamental yet complex NLP task . effective designs encode within layout and formatting signals that point to where the important information can be found.
Approach: They propose a multi-modal approach to open-domain keyphrase extraction (KPE) on the Web that leverages layout and formatting signals to aid in the task.
Outcome: The proposed model outperforms state-of-the-art models on the open-domain keyphrase extraction task.
PLATO-2: Towards Building an Open-Domain Chatbot via Curriculum Learning (2021.findings-acl)

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Challenge: PLATO-2 is a high-quality open-domain chatbot that can generate one-to-many mappings and improve response quality.
Approach: They propose a curriculum learning process to build a high-quality open-domain chatbot . they use a coarse-grained generation model and latent variables to train a generative model .
Outcome: The proposed model improves on Chinese and English data and can generate diverse responses and select the best response.
Knowledge Injection Exists in MoE? Exploring Expert-Aware Contrast Decoding in MoE for Mitigating LLMs’ Hallucinations (2026.acl-long)

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Challenge: Existing methods to mitigate hallucinations include prompt engineering and model optimization, but lack domain generalization and potential errors in fine-tuning data may exacerbate the hallucism.
Approach: They propose an expert-aware adaptive contrast decoding that uses expert differences in MoE’s higher layers to mitigate hallucinations on QA tasks.
Outcome: The proposed method outperforms baseline models on four datasets Large language models (LLMs) show strong performance but suffer from hallucinations, limiting their application.
Partial Order-centered Hyperbolic Representation Learning for Few-shot Relation Extraction (2025.coling-main)

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Challenge: Existing methods for few-shot relation extraction are limited to labeled instances and rely on data labeling.
Approach: They propose a partial order-centered hyperbolic representation learning framework which imposes constraints on relations on instances by modeling partial order in hyperbolical space.
Outcome: The proposed framework outperforms baseline methods on three benchmark datasets on 1-shot settings lacking relation descriptions.
NeKo: Cross-Modality Post-Recognition Error Correction with Tasks-Guided Mixture-of-Experts Language Model (2025.acl-industry)

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Challenge: Existing methods to train a model on a mixture of domain datasets require separate correction language models.
Approach: They propose a multi-task correction MoE that trains experts to become an "expert" of speech-to-text, language-totext and vision-to text datasets by learning to route each dataset’s tokens to its mapped expert.
Outcome: The proposed model outperforms GPT-3.5 and Claude-3.5-Sonnet on the Open ASR Leaderboard and reaches an average relative 5.0% WER reduction and substantial improvements in BLEU scores.

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