Papers by Yuxin Wang

45 papers
The Open-World Lottery Ticket Hypothesis for OOD Intent Classification (2024.lrec-main)

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Challenge: Existing methods of Out-of-Domain intent classification lack confidence in In- and Out- of-domain intents.
Approach: They propose to prune overparameterized models to provide better confidence . they extend the Lottery Ticket Hypothesis to open-world scenarios .
Outcome: The proposed model can be calibrated to distinguish In- and Out-of-domain intents . the model can also improve on open-world scenarios .
When Evolution Strategy Meets Language Models Tuning (2025.coling-main)

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Challenge: Autoregressive language models with pretraining often display limited capability in effectively following instructions.
Approach: They propose an on-policy approach to optimize models by harnessing the principle of biological evolution, namely survival of the fittest.
Outcome: The proposed method can achieve superior performance in various tasks and comparable performance in the human alignment task.
Leveraging Unit Language Guidance to Advance Speech Modeling in Textless Speech-to-Speech Translation (2025.findings-acl)

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Challenge: Existing textless speech-to-speech translation models have two main challenges: 1) learning cross-modal features and 2) learning alignment of difference languages in long sequences.
Approach: They propose a unit language to overcome two main modeling challenges . they propose task prompt modeling to utilize the unit language in guiding the modeling process.
Outcome: The proposed language improves over a strong baseline and achieves comparable performance to models trained with text.
Mitigating Visual Knowledge Forgetting in MLLM Instruction-tuning via Modality-decoupled Gradient Descent (2025.findings-emnlp)

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Challenge: Existing fine-tuning and continual learning methods compress visual representations and emphasize task alignment over visual retention.
Approach: They propose a modality-decoupled gradient descent (MDGD) that regulates gradient updates to preserve effective rank of visual features and explicitly disentangles visual learning from task-specific alignment.
Outcome: The proposed model reduces visual forgetting and improves visual retention . it disentangles visual learning from task-specific alignment and preserves effective rank .
Exploring the Impact of Negative Samples of Contrastive Learning: A Case Study of Sentence Embedding (2022.findings-acl)

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Challenge: Unsupervised contrastive learning is emerging as a powerful technique for extracting knowledge from unlabeled data.
Approach: They propose a momentum contrastive learning model with negative sample queue for sentence embedding with a simulated model with EMA update mechanism.
Outcome: The proposed model achieves a Spearman’s correlation of 77.27% on the semantic text similarity task and a maximum traceable distance metric.
Mitigating Gender Bias in Natural Language Processing: Literature Review (P19-1)

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Challenge: NLP models propagate and may even amplify gender bias found in text corpora . methods to mitigate gender bias in NLP are relatively nascent .
Approach: They propose to analyze gender bias based on four forms of representation bias and discuss the advantages and drawbacks of existing gender debiasing methods.
Outcome: The proposed methods are based on four forms of representation bias and have advantages and drawbacks.
UniSonate: A Unified Model for Speech, Music, and Sound Effect Generation with Text Instructions (2026.acl-long)

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Challenge: Generative audio modeling has been fragmented into specialized tasks such as text-to-speech (TTS), text- to-music (TTM), and text-ta (TTA) specialized models require reference audio for timbre cloning and strict phoneme alignment, whereas TTA models generate unstructured textures from open-ended captions.
Approach: They propose a unified flow-matching framework capable of synthesizing speech, music, sound effects . they propose 'token injection mechanism' that projects unstructured environmental sounds into structured temporal latent space .
Outcome: The proposed framework achieves state-of-the-art performance in instruction-based TTS and TTM while maintaining competitive fidelity in TTA.
Non-parallel Accent Transfer based on Fine-grained Controllable Accent Modelling (2023.findings-emnlp)

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Challenge: Existing accent transfer methods rely on parallel data or speech recognition models.
Approach: They propose to use mutual information learning to disentangle accent features and control the accent of the generated speech during the inference time.
Outcome: The proposed framework achieves superior performance to baseline models in accentedness and audio quality.
AnnaAgent: Dynamic Evolution Agent System with Multi-Session Memory for Realistic Seeker Simulation (2025.findings-acl)

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Challenge: Existing models of seeker simulations are limited by the cost and ethical concerns of involving real seekers in mental health research.
Approach: They propose an emotional and cognitive dynamic agent system equipped with tertiary memory to enable dynamic control of the simulator's configurations.
Outcome: The proposed system achieves more realistic seeker simulation compared to baselines.
Generative Models for Automatic Medical Decision Rule Extraction from Text (2024.emnlp-main)

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Challenge: Medical decision rules are traditionally constructed by medical experts, which is expensive and hard to scale up.
Approach: They propose to extract medical decision rules from text using generative models . their code will be open-source upon acceptance .
Outcome: The proposed model outperforms state-of-the-art models on a Chinese benchmark and achieves 67% tree accuracy.
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.
Recontextualizing Revitalization: A Mixed Media Approach to Reviving the Nüshu Language (2025.emnlp-main)

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Challenge: Nüshu is an endangered language from Jiangyong County, Hunan, China, and the world’s only known writing system created and used exclusively by women.
Approach: They propose to use NüshuStrokes to record all 397 Unicode Nü Shu characters in sequential handwriting by an expert calligrapher.
Outcome: Evaluating five state-of-the-art Chinese Optical Character Recognition systems on NüshuVision lowers CER to 0.67, a modest but meaningful improvement over previous datasets.
Improved Universal Sentence Embeddings with Prompt-based Contrastive Learning and Energy-based Learning (2022.findings-emnlp)

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Challenge: Existing contrastive methods for learning universal sentence embeddings have limitations due to their over-parameterization and poor performance under domain shift settings.
Approach: They propose to integrate an Energy-based Hinge loss to enhance the pairwise discriminative power of contrastive learning for sentence embeddings by combining PLMs with energy-based learning.
Outcome: Empirical results show that the proposed method improves on seven standard semantic textual similarity tasks and a domain-shifted STS task.
Towards Understanding Gender Bias in Relation Extraction (2020.acl-main)

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Challenge: Existing bias mitigation techniques have a negative effect on NRE, a study finds .
Approach: They create a dataset to analyze gender bias in relation extraction systems . they find that existing bias mitigation techniques have a negative effect on NRE .
Outcome: The proposed dataset analyzes gender bias in relation extraction systems using a 10% human annotated test set.
GenPT: Beyond Self-Report for Reliable LLM Psychometrics via Generative Projective Testing (2026.acl-long)

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Challenge: Large language models (LLMs) inherit contamination from training corpora, directional bias under social-desirability framing, and limited responsiveness to context beyond the item text.
Approach: They propose a paradigm that reformulates TAT, Rorschach, and SCT with newly generated stimuli and organises assessment as a three-stage pipeline.
Outcome: The proposed paradigm reformulates TAT, Rorschach, and SCT with newly generated stimuli and organises assessment as a three-stage pipeline.
MaCSC: Towards Multimodal-augmented Pre-trained Language Models via Conceptual Prototypes and Self-balancing Calibration (2024.naacl-long)

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Challenge: Existing approaches to training pre-trained language models (PLMs) focus on static image modality; inevitably encounter modality gaps and noise; and treat all modalities.
Approach: They propose a multimodal-augmented framework that can infuse multimodal semantics into PLMs and facilitate a self-balancing calibration of information allocation.
Outcome: The proposed framework outperforms baselines on multiple NLP tasks and outperformed existing frameworks.
Integrating Visual Modalities with Large Language Models for Mental Health Support (2025.coling-main)

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Challenge: Existing work of mental health support primarily utilizes unimodal textual data and fails to understand and respond to users’ emotional states comprehensively.
Approach: They propose a framework that integrates multimodal inputs and counseling strategies to enhance the performance of Large Language Models (LLMs) This approach allows LLMs to generate more nuanced and supportive responses.
Outcome: The proposed framework outperforms existing models and delivers more empathetic, coherent, and contextually relevant mental health support responses.
DecompileBench: A Comprehensive Benchmark for Evaluating Decompilers in Real-World Scenarios (2025.findings-acl)

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Challenge: Existing approaches focus on syntactic correctness through synthetic micro-benchmarks or subjective human ratings, despite semantic fidelity and usability.
Approach: They propose a framework that enables effective evaluation of decompilers in reverse engineering workflows . they compare six industrial-strength decompils and six recent LLM-powered approaches .
Outcome: The proposed framework outperforms commercial tools in code understandability despite lower functionality correctness . it shows that it can transform human-centric reverse engineering workflows .
A Study of Implicit Ranking Unfairness in Large Language Models (2024.findings-emnlp)

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Challenge: Large language models (LLMs) have demonstrated superior ability to serve as ranking models, but they will exhibit discriminatory ranking behaviors based on users’ sensitive attributes (gender).
Approach: They propose an evaluation method to investigate the severity of implicit ranking unfairness and a pair-wise regression method to conduct fair-aware data augmentation for LLM fine-tuning.
Outcome: The proposed method outperforms existing methods in ranking fairness, achieving this with only a small reduction in accuracy.
Global and Local Hierarchy-aware Contrastive Framework for Implicit Discourse Relation Recognition (2023.findings-acl)

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Challenge: Existing methods to integrate whole hierarchical information of senses into discourse relation representations for multi-level sense recognition ignore static hierarchic structure containing all senses and ignore hierarchically sense label sequence corresponding to each instance.
Approach: They propose to use a GlObal and Local Hierarchy-aware Contrastive Framework to model two kinds of hierarchies with the aid of multi-task learning and contrastive learning to learn better representations of discourse relation relationships.
Outcome: The proposed method outperforms current state-of-the-art models at all hierarchical levels on PDTB 2.0 and PDTP 3.0 datasets.
Lion: Adversarial Distillation of Proprietary Large Language Models (2023.emnlp-main)

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Challenge: Existing methods for transferring knowledge from a proprietary large language model to an open-source LLM have been criticized for not incorporating any feedback to boost student model's proficiency iteratively.
Approach: They propose a novel adversarial distillation framework that integrates feedback to identify challenging instructions where the student model’s performance falls short.
Outcome: The proposed framework surpasses existing state-of-the-art LLMs by 55.4% in challenging zero-shot reasoning benchmarks and 16.7% on AGIEval.
KnowCoder-X: Boosting Multilingual Information Extraction via Code (2025.findings-acl)

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Challenge: Empirical evidence indicates that Large Language Models exhibit spontaneous cross-lingual alignment in Information Extraction (IE) however, a significant imbalance across languages persists, highlighting an underlying deficiency.
Approach: They propose a code LLM with advanced cross-lingual and multilingual capabilities for universal IE that standardizes the representation of multilingual schemas using Python classes and conducts IE alignment instruction tuning on translated instance prediction task.
Outcome: The proposed model surpasses ChatGPT and SoTA by 30.17% without training in 29 unseen languages and significantly improves cross-lingual IE transferability.
Let’s Reason Formally: Natural-Formal Hybrid Reasoning Enhances LLM’s Math Capability (2025.emnlp-main)

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Challenge: Recent work has focused on improving the mathematical reasoning capabilities of Large Language Models (LLMs).
Approach: They propose an end-to-end framework to integrate FL into NL math reasoning . they propose a problem alignment method that reformulates QA and existence problems .
Outcome: The proposed framework achieves 89.80% and 84.34% accuracy rates on the MATH-500 and the AMC benchmarks.
Crowd Comparative Reasoning: Unlocking Comprehensive Evaluations for LLM-as-a-Judge (2025.acl-long)

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Challenge: Existing methods rely on majority voting or criteria expansion to capture detailed and detailed details, often leading to incomplete outcomes.
Approach: They propose a method which introduces additional crowd responses to compare with the candidate responses, thereby exposing deeper and more comprehensive details within the candidate answers.
Outcome: Experiments show that the proposed method improves evaluation reliability and achieves an average gain of 6.7% across five benchmarks.
Learning to Edit: Aligning LLMs with Knowledge Editing (2024.acl-long)

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Challenge: Existing knowledge editing techniques rely on memorizing updated knowledge, impeding LLMs from effectively combining the new knowledge with their inherent knowledge when answering questions.
Approach: They propose a Learning to Edit framework that equips LLMs with the ability to apply updated knowledge to input questions through a two-phase process .
Outcome: The proposed framework outperforms existing methods in knowledge editing tasks and compares it with four benchmarks and two LLM architectures.
VehicleWorld: A Highly Integrated Multi-Device Environment for Intelligent Vehicle Interaction (2025.findings-emnlp)

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Challenge: Traditional Function Calling (FC) approaches operate statelessly, requiring multiple exploratory calls to build environmental awareness before execution, leading to inefficiency and limited error recovery.
Approach: They propose a state-based function call approach that maintains explicit system state awareness and implements direct state transitions to achieve target conditions.
Outcome: The proposed approach outperforms traditional function calling approaches, achieving superior execution accuracy and reduced latency.
PCAD: Towards ASR-Robust Spoken Language Understanding via Prototype Calibration and Asymmetric Decoupling (2024.acl-long)

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Challenge: Spoken language understanding (SLU) suffers from error propagation from automatic speech recognition (ASR) in actual scenarios.
Approach: They propose a framework which calibrates bias and errors and achieves adaptive-balanced decoupling training by a prototype-based loss model.
Outcome: The proposed framework outperforms existing approaches and achieves state-of-the-art performance on three datasets.
AJ-Bench: Benchmarking Agent-as-a-Judge for Environment-Aware Evaluation (2026.findings-acl)

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Challenge: Existing approaches to verify agent behaviors in complex environments rely on rule-based verifiers or LLM-as-a-Judge models.
Approach: They propose a benchmark to evaluate Agent-as-a-Judge across three domains . the benchmark covers search, data systems, and graphical user interfaces - with 155 tasks and 516 trajectories .
Outcome: The proposed benchmark outperforms existing benchmarks in search, data systems, and GUI domains while revealing open challenges in agent-based verification.
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.
R3-RAG: Learning Step-by-Step Reasoning and Retrieval for LLMs via Reinforcement Learning (2025.findings-emnlp)

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Challenge: RAG systems that integrate external knowledge with Large Language Models often become bottlenecks due to their limited parameters compared to LLMs and their inability to perform step-by-step reasoning.
Approach: They propose a model that integrates external knowledge with Large Language Models to enhance factual correctness and mitigate hallucination.
Outcome: The proposed model outperforms baselines and can transfer well to different retrievers.
Never Lost in the Middle: Mastering Long-Context Question Answering with Position-Agnostic Decompositional Training (2024.acl-long)

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Challenge: Large language models suffer from severe hallucinations, compromising performance in knowledge-oriented QA, dialogue, and writing.
Approach: They propose to enhance the information searching and reflection ability of large language models by training them in position-agnostic multi-step QA tasks to improve their model's accuracy.
Outcome: The proposed model improves in multi-doc QA and other benchmarks by 13.7% absolute gain in shuffled settings, by 21.5% in passage retrieval task.
Evolving Agentic Workflow Driven by Human-Agent Collaboration (2026.findings-acl)

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Challenge: Existing approaches to generate agentic workflows using large language models are limited by high manual design costs, inefficient agentic search, and poor dynamic adaptability to new tasks and human preferences.
Approach: They propose an evolutionary framework for generating agentic workflows through human-agent collaboration using evolutionary algorithms that mutate and cross over their structures, prompts, and LLM backbones.
Outcome: The proposed framework surpasses other automated baselines by 27.34% while achieving comparable performance to o1-preview at only one-fourth of the cost.
FollowBench: A Multi-level Fine-grained Constraints Following Benchmark for Large Language Models (2024.acl-long)

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Challenge: Existing benchmarks focus on evaluating pure response quality, rather than assessing whether the response follows constraints stated in the instruction.
Approach: They propose a Multi-level Fine-grained Constraints Following Benchmark for Large Language Models that adds a single constraint to the initial instruction at each increased level.
Outcome: The proposed model can follow instructions with more constraints, and is deemed to have better instruction-following ability.
CSI: An Investigative Multi-Agent Framework for Explainable Short Video Fake News Detection (2026.findings-acl)

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Challenge: Existing methods for short video fake news detection rely on black-box MSLMs with poor explainability and superficial understanding or on specific prompt strategies for Multimodal Large Language Models (MLLMs)
Approach: They propose a multi-agent framework called CSI for short video fake news detection.
Outcome: The proposed framework provides rigorous explanations while achieving state-of-the-art performance on two real-world datasets.
FIER: Fine-Grained and Efficient KV Cache Retrieval for Long-context LLM Inference (2025.findings-emnlp)

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Challenge: Key-Value (KV) cache reading latency increases with context lengths hindering LLM inference . important tokens are sparsely distributed across the long context, making existing retrieval inaccurate .
Approach: They propose a method to retain a small fraction of KV cache based on token importance . important tokens are often sparsely distributed across the long context .
Outcome: The proposed method reduces decoding latency by 1.2 to 1.5.
Mathematical Proof as a Litmus Test: Revealing Failure Modes of Advanced Large Reasoning Models (2026.acl-long)

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Challenge: Large reasoning models have demonstrated remarkable mathematical problem-solving abilities, but their true reasoning shortcomings are often hidden.
Approach: They propose to leverage the rigor and methodological complexity of mathematical proofs as a diagnostic tool to expose hidden failures.
Outcome: The proposed model evaluation exploits the rigor and complexity of proof problems to uncover 10 fine-grained errors.
ToxicChat: Unveiling Hidden Challenges of Toxicity Detection in Real-World User-AI Conversation (2023.findings-emnlp)

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Challenge: toxicity detection has been largely based on social media content, leaving the unique challenges inherent to real-world user-AI interactions insufficiently explored.
Approach: They propose a benchmark to detect toxicity in real-world user-AI conversations . they compare existing models with social media content to find toxicity .
Outcome: The proposed benchmark reveals that existing models fail to recognize toxicity in real-world user-AI conversations.
ABC-Bench: Benchmarking Agentic Backend Coding in Real-World Development (2026.findings-acl)

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Challenge: Large Language Models (LLMs) have redefined the role of AI in software engineering . current benchmarks focus on localized code generation, but neglect dynamic, full-process requirements of real-world engineering.
Approach: They propose a benchmark to evaluate agentic backend coding within a realistic, executable workflow.
Outcome: The ABC-Bench benchmark evaluates agentic backend coding within a realistic, executable workflow.
MentalManip: A Dataset For Fine-grained Analysis of Mental Manipulation in Conversations (2024.acl-long)

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Challenge: Existing studies on mental manipulation focus on context-free content and face challenges in identifying implicit toxicity.
Approach: They propose a dataset that analyzes mental manipulation and its components . they propose to use 4,000 fictional dialogues to identify the techniques utilized for manipulation .
Outcome: The proposed dataset enables a comprehensive analysis of mental manipulation . it shows that leading-edge models inadequately identify and categorize manipulative content .
Visibility as Survival: Generalizing NLP for Native Alaskan Language Identification (2025.findings-acl)

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Challenge: Indigenous languages are largely invisible in commercial language identification systems, a stark reality exemplified by Google Translate’s LangID tool, which excludes all 150 Indigenous languages of North America.
Approach: They propose a framework that shows how large language models and specialized classifiers can effectively identify these languages with minimal data.
Outcome: The proposed framework shows that large language models and specialized classifiers can effectively identify these languages with minimal data.
Exploring the Potential of ChatGPT on Sentence Level Relations: A Focus on Temporal, Causal, and Discourse Relations (2024.findings-eacl)

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Challenge: Recent studies have demonstrated ChatGPT's remarkable few-shot, even zero-shot learning abilities when compared to other models.
Approach: They quantitatively evaluate the performance of ChatGPT on inter-sentential relations such as temporal relations, causal relations, and discourse relations.
Outcome: The proposed model performs well on temporal relations, causal relations, and discourse relations.
IDEA: An Interpretable and Editable Decision-Making Framework for LLMs via Verbal-to-Numeric Calibration (2026.findings-acl)

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Challenge: Existing approaches fail to integrate domain expert insights beyond simple prompting.
Approach: They propose a framework that extracts LLM decision knowledge into an interpretable parametric model over semantically meaningful factors.
Outcome: Experiments show that IDEA outperforms DeepSeek R1 and GPT-5.2 in accuracy and accuracy.
Instruction-Tuning Data Synthesis from Scratch via Web Reconstruction (2025.findings-acl)

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Challenge: Existing methods for generating and curating high-quality instruction-tuning data rely heavily on the quality of seed data or strong assumptions about the structure and content of web documents.
Approach: They propose a fully automated framework for synthesizing high-quality instruction-tuning (IT) data directly from raw web documents with minimal assumptions.
Outcome: The proposed framework outperforms state-of-the-art baselines by 16.65% across four instruction-following benchmarks.
CFSP: An Efficient Structured Pruning Framework for LLMs with Coarse-to-Fine Activation Information (2025.coling-main)

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Challenge: Existing LLM pruning works focus on unstructured pruning, which typically requires special hardware support for a practical speed-up.
Approach: They propose a network pruning framework that leverages both coarse and fine-grained activation information as an importance criterion to guide pruning.
Outcome: The proposed framework outperforms existing pruning methods on diverse models across sparsity budgets.
MT-Eval: A Multi-Turn Capabilities Evaluation Benchmark for Large Language Models (2024.emnlp-main)

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Challenge: Existing evaluation frameworks focus on single-turn evaluations, overlooking the models’ capabilities in multi-turn interactions.
Approach: They propose a benchmark to evaluate the multi-turn conversational abilities of large language models (LLMs) by analyzing human-LLM conversations and constructing multi-turned queries for each category using GPT-4.
Outcome: The proposed model outperforms open-source models in multi-turn tasks while retaining and recalling historical information.

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