Papers by Chen Qu

43 papers
AgentCourt: Simulating Court with Adversarial Evolvable Lawyer Agents (2025.findings-acl)

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Challenge: Existing legal language models struggle with dynamic courtroom interactions, resulting in overfitting to standardized legal tasks.
Approach: They propose a new adversarial evolutionary approach for agents that performs dynamic knowledge learning and evolution through structured adversarials in a simulated courtroom program.
Outcome: The proposed approach outperforms existing LLM-based models in three critical dimensions: cognitive agility, professional knowledge, and logical rigor.
Timeline-based Sentence Decomposition with In Context Learning for Temporal Fact Extraction (2024.acl-long)

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Challenge: Recent research on temporal fact extraction fails to establish time-to-fact correspondences in complex sentences.
Approach: They propose a timeline-based sentence decomposition strategy using large language models with in-context learning to extract temporal facts from natural language text.
Outcome: The proposed method achieves state-of-the-art on a complex temporal fact extraction dataset.
Bit-Flip Error Resilience in LLMs: A Comprehensive Analysis and Defense Framework (2025.emnlp-main)

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Challenge: Bit-flip errors (BFEs) are hardware faults where individual bits in memory or processing units are unintentionally flipped.
Approach: They propose a novel defense strategy to mitigate bit-flip errors (BFEs) they propose bfe protection and a self-correction mechanism to minimize performance degradation .
Outcome: The proposed defense strategy minimizes performance degradation while significantly improving robustness against BFEs.
UQ-Merge: Uncertainty Guided Multimodal Large Language Model Merging (2025.findings-acl)

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Challenge: Existing models merging methods often lead to suboptimal performance due to harmful models . et al., 2018; 59: 59-64.
Approach: They propose an uncertainty-guided MLLM merging algorithm that integrates models into a single MLML.
Outcome: The proposed algorithm improves on held-in and held-out vision-language benchmarks.
Mitigating Boundary Ambiguity and Inherent Bias for Text Classification in the Era of Large Language Models (2024.findings-acl)

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Challenge: a new text classification framework for large language models addresses the problem of boundary ambiguity and inherent biases in LLMs.
Approach: They propose a two-stage classification framework for large language models to mitigate bottlenecks . their approach uses pairwise comparisons to efficiently narrow down options .
Outcome: The proposed framework reduces the number of options and improves on four datasets.
How Can Cross-lingual Knowledge Contribute Better to Fine-Grained Entity Typing? (2022.findings-acl)

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Challenge: Extensive experiments on multi-lingual datasets show that our method significantly outperforms multiple baselines and can robustly handle negative transfer.
Approach: They propose to transfer semantic knowledge from rich-resourced languages to low-resource languages by using multilingual transfer learning.
Outcome: The proposed model outperforms baselines and can handle negative transfer.
Label-Aware Double Transfer Learning for Cross-Specialty Medical Named Entity Recognition (N18-1)

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Challenge: NER is a fundamental problem for medical text mining because of the difference of specialties and cost of human annotation.
Approach: They propose a label-aware double transfer learning framework for medical NER from electronic medical records.
Outcome: The proposed framework improves accuracy over strong baselines on 12 cross-specialty NER tasks.
Automatic rule generation for time expression normalization (2021.findings-emnlp)

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Challenge: Existing SOTA methods for normalization rely on expert-designed rules or grammars . current methods are domain sensitive and not sufficient on emerging corpora .
Approach: They propose a method that generates normalization rules from annotated data without expert intervention.
Outcome: The proposed method surpasses existing rule-based methods on the Tweets benchmark and on the TempEval-3 benchmark.
Evaluating Memory Capability in Continuous Lifelog Scenario (2026.findings-acl)

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Challenge: Existing benchmarks focus on online one-on-one chatting or human-AI interactions, neglecting real-world scenarios.
Approach: They propose a framework to curate a lifelog benchmark that combines two subsets of audio data to address temporal leakage in offline settings.
Outcome: The proposed framework outperforms existing benchmarks on live chats and AI interactions.
TrendSim: Simulating Trending Topics in Social Media Under Poisoning Attacks with LLM-based Multi-agent System (2025.findings-naacl)

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Challenge: Trending topics bring in a new channel for poisoning attacks, resulting in negative impacts on society.
Approach: They propose an LLM-based multi-agent system to simulate trending topics in social media . they propose a time-aware interaction mechanism, centralized message dissemination, and an interactive system .
Outcome: The proposed system simulates trending topics under poisoning attacks on social media platforms.
Unmasking Deceptive Visuals: Benchmarking Multimodal Large Language Models on Misleading Chart Question Answering (2025.emnlp-main)

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Challenge: Misleading visualizations can distort perception and lead to incorrect conclusions.
Approach: They propose a large-scale multimodal dataset to evaluate MLLMs on misleading chart reasoning.
Outcome: The proposed framework evaluates MLLMs on misleading chart reasoning on a large-scale multimodal dataset spanning 21 misleader types and 10 chart types . it contains 3,026 curated examples spanning standard chart code, CSV data, multiple-choice questions, and labeled explanations, validated through iterative MLML checks and exhausted expert human review.
Multi-level Association Refinement Network for Dialogue Aspect-based Sentiment Quadruple Analysis (2025.acl-long)

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Challenge: Existing methods for identifying quadruples rely on predefined dialogue structure and word semantics to achieve accurate and comprehensive sentiment associations between utterances and words.
Approach: They propose a multi-level association refinement network to achieve more accurate sentiment associations between utterances and words.
Outcome: The proposed framework achieves state-of-the-art performance under low-resource conditions.
Semantic Framework based Query Generation for Temporal Question Answering over Knowledge Graphs (2022.emnlp-main)

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Challenge: Existing methods for temporal question answering ignore intrinsic connections between events that can make them temporally related.
Approach: They propose a temporal question answering method that generates query graphs by exploring relevant facts of mentioned entities.
Outcome: The proposed method outperforms existing methods on two benchmarks over different knowledge graphs.
DuReader-Retrieval: A Large-scale Chinese Benchmark for Passage Retrieval from Web Search Engine (2022.emnlp-main)

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Challenge: Existing datasets for non-English passage retrieval are lacking in quality and accuracy.
Approach: They present a large-scale Chinese dataset for passage retrieval . they reduce false negatives by manually annotating results pooled from multiple retrievers .
Outcome: The proposed dataset reduces false negatives in development and testing sets and removes similar training queries.
Commonsense Knowledge Salience Evaluation with a Benchmark Dataset in E-commerce (2022.findings-emnlp)

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Challenge: Existing models rank statements solely by confidence scores, and there is no information about which ones are salient from a human perspective.
Approach: They propose a task where a model is required to learn whether a triple is salient . they propose supervised salience evaluation using a new Benchmark dataset .
Outcome: The proposed task is based on a new Benchmark dataset of salience evaluation in e-commerce . it shows that saliency evaluation is hard, where models perform poorly on evaluation set .
BiTIIMT: A Bilingual Text-infilling Method for Interactive Machine Translation (2022.acl-long)

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Challenge: Existing IMT systems relying on lexical constrained decoding (LCD) are limited in translation efficiency and quality due to LCD.
Approach: They propose a novel interactive neural machine translation system that uses lexical constraints to decode missing words in a manually revised translation.
Outcome: The proposed system performs significantly better and faster than state-of-the-art IMT on three translation tasks.
Social Welfare Function Leaderboard: On the Emergence of LLM Agents as the Welfare Dictator (2026.findings-acl)

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Challenge: Large language models (LLMs) are increasingly entrusted with high-stakes decisions that affect human welfare.
Approach: They evaluate 20 state-of-the-art Large language models (LLMs) and 20 LLM dictators to create a social welfare function benchmark.
Outcome: The proposed model creates dilemma between maximizing collective efficiency and ensuring distributive fairness.
Beyond Quantity: Trajectory Diversity Scaling for Code Agents (2026.findings-acl)

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Challenge: Code large language models (LLMs) are becoming tool-interactive agents . quantity-centric scaling exhibits an early bottleneck that underutilizes trajectory data . et al.: a new approach to scale trajectory diversity improves tool-use generalization .
Approach: They propose a Trajectory Diversity Scaling-based data synthesis framework for code agents that scales performance through diversity rather than raw volume.
Outcome: Experiments on general tool-use benchmarks and code agent tasks show that TDScaling improves tool-user generalization and inherent coding proficiency.
Too Good to be Bad: On the Failure of LLMs to Role-Play Villains (2026.findings-acl)

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Challenge: Large Language Models (LLMs) are increasingly tasked with creative generation, but their ability to portray non-prosocial, antagonistic personas remains largely unexamined.
Approach: They propose a moral alignment benchmark to test the safety of large language models . they find that models struggle with traits directly antithetical to safety principles .
Outcome: The proposed model fails to accurately portray morally ambiguous or villainous characters . the model fails most with traits directly antithetical to safety principles .
Dream to Chat: Model-based Reinforcement Learning on Dialogues with User Belief Modeling (2025.findings-emnlp)

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Challenge: a framework for constructing dialogue world models for natural language tasks is currently lacking.
Approach: They propose a framework that can be used to train a dialogue world model.
Outcome: The proposed framework can predict future utterances and user beliefs . it can achieve state-of-the-art performance on emotion classification and sentiment identification .
AdaLoGN: Adaptive Logic Graph Network for Reasoning-Based Machine Reading Comprehension (2022.acl-long)

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Challenge: Existing methods and limitations for machine reading comprehension are insufficient for logical reasoning over text.
Approach: They propose a neural-symbolic approach which passes messages over a graph representing logical relations between text units to predict an answer.
Outcome: The proposed approach outperforms existing methods on ReClor and LogiQA.
Collaborative Policy Learning for Open Knowledge Graph Reasoning (D19-1)

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Challenge: Existing models of knowledge graph reasoning suffer from limited performance when working on sparse and incomplete graphs due to the lack of evidential paths that can reach target entities.
Approach: They propose a framework to train two collaborative agents to reason for missing facts over a graph augmented by a text corpus.
Outcome: Experiments on two public datasets show the proposed approach is effective on a knowledge graph reasoning task.
GeoAgent: To Empower LLMs using Geospatial Tools for Address Standardization (2024.findings-acl)

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Challenge: Existing approaches to address address standardization are lacking in the current field.
Approach: They propose a framework that incorporates spatial knowledge into address texts and achieves efficient address standardization.
Outcome: The proposed framework incorporates spatial knowledge into address texts and achieves efficient address standardization.
Mirror: A Universal Framework for Various Information Extraction Tasks (2023.emnlp-main)

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Challenge: Recent studies often formulate IE tasks as a triplet extraction problem, but this paradigm does not support multi-span and n-ary extraction, leading to weak versatility.
Approach: They propose a multi-span cyclic graph extraction problem and a non-autoregressive graph decoding algorithm to extract all spans in a single step.
Outcome: The proposed model outperforms or reaches competitive performance with SOTA systems under few-shot and zero-shot settings and it is compatible with 57 datasets.
Miracle: Towards Personalized Dialogue Generation with Latent-Space Multiple Personal Attribute Control (2023.findings-emnlp)

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Challenge: Personalized dialogue systems aim to endow the chatbot agent with more anthropomorphic traits for human-like interactions.
Approach: They propose a method to generate personalized dialogues using latent-space energy-based models by using a latent space energy-model.
Outcome: The proposed method outperforms baselines in personality controllability and response quality.
Confidence is not Timeless: Modeling Temporal Validity for Rule-based Temporal Knowledge Graph Forecasting (2024.acl-long)

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Challenge: Existing literature on temporal knowledge Graph Forecasting lacks in-depth investigation into how confidence evolves with time.
Approach: They propose a framework to model the temporal validity of rules for Temporal Knowledge Graph Forecasting (TKGF) they propose rule-adversarial negative sampling and time-aware negative sampling strategies to facilitate TempValid learning.
Outcome: The proposed framework outperforms state-of-the-art (SOTA) rule-based methods on six TKGF datasets.
Large Dual Encoders Are Generalizable Retrievers (2022.emnlp-main)

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Challenge: Experimental results show that dual encoders outperform sparse and dense retrievers on the BEIR dataset significantly.
Approach: They challenge belief that bottleneck layer is too limited for out-of-domain generalization . they scale up the model while keeping bottleneck as a single dot-product with a fixed size .
Outcome: The proposed model outperforms sparse and dense retrievers on the BEIR dataset significantly.
Adaptive Textual Label Noise Learning based on Pre-trained Models (2023.findings-emnlp)

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Challenge: Existing approaches to learning with noisy labels are limited due to the time and labor costs involved.
Approach: They propose an adaptive warm-up and hybrid training frameworks to learn with noisy labels based on pre-trained models.
Outcome: The proposed approach performs comparable or even surpasses state-of-the-art methods in various noise scenarios, including scenarios with the mixture of multiple types of noise.
FCGCL: Fine- and Coarse-Granularity Contrastive Learning for Speech Translation (2022.findings-emnlp)

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Challenge: Existing methods to perform implicit knowledge transfer from machine translation to ST model are difficult because of the task complexity and data scarcity.
Approach: They recommend a method which conducts explicit knowledge transfer from MT to ST model by fine and coarse granularity contrastive learning.
Outcome: The proposed method improves the performance of the end-to-end speech translation model on all 8 languages.
TREA: Tree-Structure Reasoning Schema for Conversational Recommendation (2023.acl-long)

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Challenge: Recent reasoning-based models cannot fully figure out complex causal relationships between mentioned entities with external knowledge.
Approach: They propose a Tree structure Reasoning schEmA that constructs a multi-hierarchical scalable tree as the reasoning structure to clarify the causal relationships between mentioned entities.
Outcome: Extensive experiments on two public CRS datasets show the proposed model works.
Dynamic Data Mixing Maximizes Instruction Tuning for Mixture-of-Experts (2025.naacl-long)

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Challenge: Mixture-of-Experts (MoE) models are constrained by their fixed model capacities when the number of tasks grows in instruction tuning.
Approach: They propose to combine all training tasks and apply fixed sampling weights without considering the importance of different tasks as the model training state changes.
Outcome: The proposed method can be used on knowledge & reasoning tasks and open-ended queries with limited training budget.
Does Theory of Mind Improvement Really Benefit Human-AI Interactions? Empirical Findings from Interactive Evaluations (2026.findings-acl)

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Challenge: Existing benchmarks measure ToM capability improvement through story-reading, multiple-choice questions from a third-person perspective, while ignoring the first-person, dynamic nature of human-AI interactions.
Approach: They propose a new paradigm of interactive ToM evaluation with both perspective and metric shifts.
Outcome: The proposed approach improves the performance of four representative LLM enhancement techniques using real-world datasets and a user study.
MusTQ: A Temporal Knowledge Graph Question Answering Dataset for Multi-Step Temporal Reasoning (2024.findings-acl)

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Challenge: Existing studies focus on fact-centered reasoning with limited attention to temporal reasoning.
Approach: They propose a new TKGQA dataset, MusTQ, which contains 666K multi-step temporal reasoning questions and a TKG.
Outcome: The proposed model achieves state-of-the-art multi-step temporal reasoning ability with entity-time attention mechanism and optimized temporal knowledge graph representation.
MetaMixSpeech: Meta Task Augmentation for Low-Resource Speech Recognition (2025.findings-emnlp)

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Challenge: Meta-learning has proven to be a powerful paradigm for improving speech recognition performance . however, multilingual meta learning also faces challenges such as task overfitting and learner overfit .
Approach: a new method is proposed to augment meta-training tasks with "more data" the method incorporates both support and query augmentations .
Outcome: The proposed method achieves a 6.35% improvement in the word error rate on FLEURS and Common Voice datasets.
Meta-Adapter for Self-Supervised Speech Models: A Solution to Low-Resource Speech Recognition Challenges (2024.lrec-main)

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Challenge: Existing self-supervised learning models can learn latent representations from large amounts of unlabeled data, but they are expensive to fine-tune.
Approach: They develop a meta-adapter to obtain meta-initialized parameters for self-supervised models . meta-Adapters show better generalization and extensibility than traditional pretraining methods .
Outcome: Experiments on common voice and FLEURS datasets show Meta-Adapter performs better on low-resource languages . authors show it can be used on 12 low-source languages, but it requires huge computational resources .
QuantumQA: Enhancing Scientific Reasoning via Physics-Consistent Dataset and Verification-Aware Reinforcement Learning (2026.acl-long)

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Challenge: Large language models lack reliability in scientific domains that require strict adherence to physical constraints.
Approach: They propose a large-scale dataset constructed via a task-adaptive strategy and a hybrid verification protocol that combines deterministic solvers with semantic auditing to guarantee scientific rigor.
Outcome: The proposed model outperforms baselines and general-purpose preference models and is competitive with proprietary models.
Exploring Dual Encoder Architectures for Question Answering (2022.emnlp-main)

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Challenge: Dual encoders have been used for question-answering and information retrieval tasks with good results.
Approach: They propose to use two different versions of dual encoders for QA retrieval tasks . they propose to share parameters in projection layers between two encoder towers .
Outcome: The proposed architectures outperform SDE and ADE on QA retrieval tasks.
FaLA: Fast Linear Adaptation for Replacing Backbone Models on Edge Devices (2023.findings-emnlp)

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Challenge: Current NLP models heavily rely on pre-trained models, such as BERT and RoBERTa.
Approach: They propose a lightweight method for personalized NLP classification tasks post-backbone replacement using a personalized matrix calculated from documents corresponding to users' old and new backbones.
Outcome: The proposed method achieves over 1000 times computation reduction in Flops for backpropagation and brings the user-specific initialization for personal matrix yielding significant performance boost compared with popular transfer learning methods.
FedDQC: Data Quality Control in Federated Instruction-tuning of Large Language Models (2025.findings-acl)

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Challenge: Federated Learning (FL) enables privacy-preserving collaborative instruction tuning of large language models.
Approach: They propose a federated instruction tuning framework with dynamic data quality control to solve this problem.
Outcome: The proposed framework improves performance on mixed-quality datasets on synthetic and real-world datasets.
More Than Sum of Its Parts: Deciphering Intent Shifts in Multimodal Hate Speech Detection (2026.findings-acl)

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Challenge: Existing systems struggle with multimodal content where the emergent meaning transcends the aggregation of individual modalities.
Approach: They propose a framework to characterize semantic intent shifts where modalities interact to construct implicit hate from benign cues or neutralize toxicity through semantic inversion.
Outcome: The proposed framework outperforms state-of-the-art benchmarks on H-VLI and on established benchmarks.
History-Aware Conversational Dense Retrieval (2024.findings-acl)

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Challenge: Current approaches for conversational dense retrieval rely on fine-tuning a pre-trained ad-hoc retriever, which can be lengthy and noisy.
Approach: They propose a context-denoised query reformulation and automatic mining of supervision signals based on historical turns.
Outcome: The proposed system improves on two public conversational search datasets.
BatonVoice: An Operationalist Framework for Enhancing Controllable Speech Synthesis with Linguistic Intelligence from LLMs (2026.acl-long)

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Challenge: Existing approaches often fail to leverage the linguistic intelligence of Large Language Models (LLMs) Existing models lack the ability to follow text instructions for controllable Text-to-Speech (TTS).
Approach: They propose a framework where an LLM acts as a conductor, understanding user instructions and generating a textual plan - explicit vocal features.
Outcome: The proposed model outperforms open- and closed-source models in speech synthesis and achieves zero-shot cross-lingual generalization.

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