Papers by Yuxuan Li

45 papers
SP3: Enhancing Structured Pruning via PCA Projection (2024.findings-acl)

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Challenge: Structured pruning is a widely used technique for reducing the size of pre-trained language models, but current methods overlook the potential of compressing the hidden dimension d in PLMs.
Approach: They propose a structured pruning approach that projectes features into a space defined by principal components before masking the hidden dimension d in pre-trained language models.
Outcome: Experiments on benchmarks show that SP3 can reduce d by 70%, compress 94% of the BERTbase model, and maintain over 96% accuracy.
Event Transition Planning for Open-ended Text Generation (2022.findings-acl)

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Challenge: Open-ended text generation tasks require models to generate coherent continuation given limited preceding context.
Approach: They propose a novel two-stage method which explicitly arranges ensuing events in open-ended text generation tasks.
Outcome: The proposed method improves coherence and diversity of open-ended text generation tasks.
TritonBench: Benchmarking Large Language Model Capabilities for Generating Triton Operators (2025.findings-acl)

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Challenge: Triton is a high-level Python-like programming language for building efficient GPU kernels.
Approach: They propose a TritonBench benchmark that provides a comprehensive evaluation of Tritonic operators on widely deployed GPUs.
Outcome: The proposed benchmarks show that current LLMs struggle to generate efficient Triton operators on widely deployed GPUs aligned with industry applications.
On LLM-Based Scientific Inductive Reasoning Beyond Equations (2025.emnlp-main)

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Challenge: Existing research on inductive reasoning models emphasizes rule design without grounding them in specific scenarios.
Approach: They propose to use LLMs to learn underlying patterns from limited examples in entirely new environments.
Outcome: The proposed benchmark evaluates the inductive reasoning abilities of large language models in scientific settings.
LLMs Trust Humans More, That’s a Problem! Unveiling and Mitigating the Authority Bias in Retrieval-Augmented Generation (2025.acl-long)

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Challenge: Large language models (LLMs) generate outputs that stray from user input or contravene established knowledge.
Approach: They propose a new phenomenon, Authority Bias, where LLMs favor one knowledge source over the other . they propose atomic information that generates conflicts and a Conflict Detection Enhanced Query framework .
Outcome: The proposed framework reduces Authority bias in large language models . it detects conflicts, performs credibility assessment on conflicting paragraphs, and detects perturbed text .
Can We Edit Factual Knowledge by In-Context Learning? (2023.emnlp-main)

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Challenge: In-context knowledge editing (IKE) is a new paradigm for NLP research that can be applied to large language models with tens or hundreds of parameters.
Approach: They propose to use in-context knowledge editing (IKE) without gradient updating to edit factual knowledge without a gradient update.
Outcome: The proposed method achieves a competitive success rate compared to gradient-based methods on GPT-J but with fewer side effects.
Adaptive Backtracking for Privacy Protection in Large Language Models (2026.findings-acl)

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Challenge: Existing privacy protection methods are prone to privacy leakage, but they are not effective in ensuring the privacy of users.
Approach: They propose to capture latent leakage tendency of large language models during generation process and to construct a new benchmark for personal information.
Outcome: The proposed method improves privacy by up to 14% over strong baselines against adversarial attacks, avoiding the degradation of response utility.
Context-aware Watermark with Semantic Balanced Green-red Lists for Large Language Models (2024.emnlp-main)

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Challenge: Recent research suggests that watermarking methods cause degradation of text quality due to semantic disparities between the watermarked text and the unwatermarked text.
Approach: They propose a semantic-aware watermark method that generates a watermark key considering contexts to split a green/red list for watermark injection.
Outcome: The proposed method reduces performance drop due to adding bias on green lists . it also allows green lists to cover almost all semantics .
Towards Reliable Large Audio Language Model (2025.findings-acl)

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Challenge: Recent advances in large audio language models (LALMs) have demonstrated impressive results and promising prospects in universal understanding and reasoning across speech, music, and general sound.
Approach: They propose to use training-free and training-based methods to enhance LALM reliability to different extents.
Outcome: The proposed methods improve the reliability of large audio language models to different extents.
Xiaomingbot: A Multilingual Robot News Reporter (2020.acl-demos)

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Challenge: Xiaomingbot is a multilingual and multimodal software robot with four capabilities: news generation, news translation, news reading and avatar animation.
Approach: They propose to build a multilingual and multimodal software robot with four inte- gal capabilities: news generation, news translation, news reading and avatar animation.
Outcome: The proposed system generates Chinese news, then reads it in multiple languages and generates an animated avatar reading it.
StorySparkQA: Expert-Annotated QA Pairs with Real-World Knowledge for Children’s Story-Based Learning (2024.emnlp-main)

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Challenge: Existing story reading systems fail to capture the nuances of how education experts think when conducting interactive story reading activities.
Approach: They propose to use existing question-answering (QA) datasets to capture experts' annotations and thinking process to construct a story-based annotation framework.
Outcome: The proposed framework captures experts’ annotations and thinking process and can be used to generate 5, 868 expert-annotated QA pairs with real-world knowledge.
DRP: Distilled Reasoning Pruning with Mathematical Skill-aware Step Decomposition for Efficient Large Reasoning Models (2026.findings-acl)

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Challenge: Existing solutions to this problem are inference-time pruning and tuning-based distillation.
Approach: They propose a framework that combines inference-time pruning with tuning-based distillation to enable efficient and accurate reasoning.
Outcome: The proposed framework reduces token usage while improving accuracy on GSM8K and AIME tokens while avoiding performance drop.
SLAM-Omni: Timbre-Controllable Voice Interaction System with Single-Stage Training (2025.findings-acl)

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Challenge: a new spoken dialogue system with single-stage training is demonstrating its low latency and high quality . SLAM-Omni achieves zero-shot timbre control by modeling spoken language with semantic tokens .
Approach: They propose a timbre-controllable, end-to-end voice interaction system with single-stage training.
Outcome: The proposed system outperforms previous models on 4 GPUs with limited data.
Beyond Labels: Empowering Human Annotators with Natural Language Explanations through a Novel Active-Learning Architecture (2023.findings-emnlp)

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Challenge: Existing low-resource learning techniques focus on label annotation while neglecting the natural language explanation of a data point.
Approach: They propose a novel architecture that leverages an explanation-generation model to produce explanations guided by human explanations and a prediction model that utilizes generated explanations toward prediction faithfully.
Outcome: The proposed architecture produces explanations guided by human explanations, a prediction model that utilizes generated explanations toward prediction faithfully, and a data diversity-based AL sampling strategy that benefits from the explanation annotations.
Trajectory2Task: Training Robust Tool-Calling Agents with Synthesized Yet Verifiable Data for Complex User Intents (2026.acl-long)

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Challenge: Tool-calling agents are increasingly deployed in real-world customer-facing workflows . but most studies on tool-callers focus on idealized settings with general, fixed, and well-specified tasks.
Approach: They propose a tool-calling agent-based data pipeline that converts trajectories into user-facing tasks with controlled intent adaptations.
Outcome: The proposed pipeline can be used to study tool use under three scenarios.
Temporal Leakage in Search-Engine Date-Filtered Web Retrieval: A Retrospective Forecasting Case Study (2026.acl-short)

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Challenge: Search-engine date filters are widely used to enforce pre-cutoff retrieval in retrospective evaluations of search-augmented forecasters.
Approach: They propose stronger retrieval safeguards or evaluation on frozen, time-stamped web snapshots to prevent post-cutoff leakage.
Outcome: The proposed approach is unreliable across two major search engines, and the results are inflated.
Investigating and Mitigating the Multimodal Hallucination Snowballing in Large Vision-Language Models (2024.acl-long)

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Challenge: Large Vision-Language Models (LVLMs) suffer from multimodal hallucinations . however, the generated hallucines could influence the models’ subsequent generation .
Approach: They propose a framework to evaluate LVLMs' behaviors when encountering generated hallucinations and a method to revise the output distribution of LVLs with the one derived from the residual visual input.
Outcome: The proposed framework reduces the performance of open-source LVLMs by 31%, indicating that they are prone to accept the generated hallucinations and make false claims that they would not have supported without distractions.
MathCanvas: Intrinsic Visual Chain-of-Thought for Multimodal Mathematical Reasoning (2026.acl-long)

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Challenge: Existing approaches to visual chain-of-thought are limited by external tools or fail to generate high-fidelity diagrams.
Approach: They propose a framework to enable large multimodal models with VCoT capabilities . they pre-train a model on a 15.2M-pair corpus and teach it how to leverage visual aids .
Outcome: The proposed framework unlocks complex, human-like visual reasoning in large language models . it pre-trains the model on a 15.2M-pair corpus and fine-tunes it on MathCanvas-Instruct .
Do you have the right scissors? Tailoring Pre-trained Language Models via Monte-Carlo Methods (2020.acl-main)

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Challenge: Pre-trained language models can be fine-tuned on task-specific datasets, but fine-timing can lead to over- and/or under-estimation problems.
Approach: They propose a method to transfer probability mass from over-estimated regions to under-estimates by truncating and transferring probability mass between over- and under-estimating regions.
Outcome: The proposed method outperforms the fine-tuning approach on a variety of datasets.
PhysPRM: A Generative Process Reward Model with Fine-grained Diagnosis for Physics Problem Solving (2026.findings-acl)

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Challenge: Existing Large Language Models (LLMs) struggle with physics problem solving due to difficulties in decoding implicit constraints and maintaining physical consistency.
Approach: They propose a Generative PRM that treats evaluation as a generative task . it produces fine-grained diagnoses comprising critiques, final judgments, and specific error types .
Outcome: The proposed model improves performance across seven benchmarks in Best-of-N and critique refinement strategies.
LLMs for Now, Fine-Tuning for Later: An Ensemble Approach to Data Drift in Domain-Specific Tasks (2026.acl-srw)

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Challenge: Deploying machine learning models in domain-specific scenarios is challenged by data drift and the scarcity of expert annotations.
Approach: They propose a system that combines an LLM, an AL-assisted compact model and an automatic switch module to assist the active learning process.
Outcome: The proposed system achieves 96–98% switch accuracy and outperforms both models used alone.
From Generation to Judgment: Opportunities and Challenges of LLM-as-a-judge (2025.emnlp-main)

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Challenge: Recent advances in Large Language Models (LLMs) inspire the "LLM-as-a-judge" paradigm . traditional methods of assessment and evaluation fail in dynamic and open-ended scenarios .
Approach: They propose a paradigm where LLMs are leveraged to perform scoring, ranking, or selection for machine learning evaluation scenarios.
Outcome: The proposed model-based judgment and evaluation paradigms are based on large language models and are compared to the current model-driven evaluation paradigm.
FR-Spec: Accelerating Large-Vocabulary Language Models via Frequency-Ranked Speculative Sampling (2025.acl-long)

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Challenge: Speculative sampling is an efficient way to accelerate the auto-regressive generation process of large language models.
Approach: They propose a frequency-ranked speculative sampling framework that optimizes draft candidate selection through vocabulary space compression.
Outcome: Experiments show that FR-Spec reduces LM Head computation overhead by 75% while ensuring the equivalence of the final output distribution.
Summarizing Dialogues with Negative Cues (2022.coling-1)

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Challenge: Abstractive dialogue summarization aims to convert long dialogue content into its short form where the salient information is preserved while the redundant pieces are ignored.
Approach: They propose to have the model perceive the redundant parts of an input dialogue history during the training phase.
Outcome: The proposed method significantly outperforms baselines on the semantic matching and factual consistent based metrics.
AutoReproduce: Automatic AI Experiment Reproduction with Paper Lineage (2026.acl-long)

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Challenge: Efficient reproduction of research papers requires deep domain expertise.
Approach: They propose a framework that systematically mines implicit knowledge from the cited literature to reproduce experimental code in a complete, end-to-end manner.
Outcome: The proposed framework surpasses baselines across all metrics and reproduces experimental code in a complete, end-to-end manner.
Huatuo-26M, a Large-scale Chinese Medical QA Dataset (2025.findings-naacl)

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Challenge: Large Language Models are a powerful tool for medical research, but the data is a bottleneck.
Approach: They propose to use the largest ever medical Question Answering dataset with 26 Million QA pairs as a fine-tuning data for training large language models.
Outcome: The proposed dataset demonstrates that it can be used to train large language models and improves zero-shot performance on other datasets.
Leveraging Large Language Models for NLG Evaluation: Advances and Challenges (2024.emnlp-main)

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Challenge: introducing Large Language Models (LLMs) has opened new avenues for assessing generated content quality, e.g., coherence, creativity, and context relevance.
Approach: They propose a taxonomy for organizing existing LLM-based evaluation metrics and a structured framework to understand and compare them.
Outcome: The proposed taxonomy offers a framework to understand and compare LLM-based evaluation methods.
LM-Searcher: Cross-domain Neural Architecture Search with LLMs via Unified Numerical Encoding (2025.emnlp-main)

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Challenge: Recent advances in Large Language Models have opened new avenues for solving complex optimization problems, including Neural Architecture Search (NAS).
Approach: They propose a framework that leverages LLMs for cross-domain neural architecture optimization without extensive domain-specific tuning.
Outcome: The proposed framework achieves competitive performance in both in-domain and out-of-domain tasks.
OPeRA: A Dataset of Observation, Persona, Rationale, and Action for Evaluating LLMs on Human Online Shopping Behavior Simulation (2026.acl-long)

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Challenge: evaluating LLMs' ability to mimic real user behavior remains an open challenge due to the lack of high-quality, publicly available datasets that capture both the observable actions and the internal reasoning of an actual user.
Approach: They propose a dataset of Observation, Persona, Rationale, and Action collected from real human participants during online shopping sessions.
Outcome: The proposed dataset is the first to evaluate how well current LLMs can accurately simulate the next web action of a specific user.
AGTAO: Robust and Stabilized LLM Unlearning via Adversarial Gating Training with Adaptive Orthogonality (2026.findings-acl)

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Challenge: Large Language Models (LLMs) unintentionally memorize sensitive data, posing privacy and security risks.
Approach: They propose a framework that reconciles unlearning efficacy and utility preservation by using a latent-space gating mechanism to simulate internal recovery attempts.
Outcome: The proposed framework achieves superior trade-off between unlearning efficacy and model utility.
ATLAS: Agent Tuning via Learning Critical Steps (2025.findings-acl)

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Challenge: Existing agent tuning approaches employ supervised finetuning on entire expert trajectories, but behavior-cloning of full traitories introduces expert bias and weakens generalization to states not covered by the expert data.
Approach: They propose a method that finetunes LLMs on critical steps in expert trajectories and identifies and finetuns them on these steps with reduced costs.
Outcome: The proposed method outperforms existing methods and open-source LLM agents on only 30% critical steps in extensive experiments.
ArcLight: A Lightweight LLM Inference Architecture for Many-Core CPUs (2026.acl-demo)

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Challenge: Existing frameworks for large language model (LLM) inference on CPUs overlook overhead of cross-NUMA memory access.
Approach: They propose a lightweight LLM inference architecture designed from the ground up for many-core CPUs.
Outcome: Experimental results show that ArcLight surpasses the performance ceiling of mainstream frameworks, achieving up to 46% higher inference throughput.
Spontaneous Giving and Calculated Greed in Language Models (2025.emnlp-main)

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Challenge: Large language models demonstrate strong problem-solving abilities through reasoning techniques such as chain-of-thought prompting and reflection.
Approach: They evaluate off-the-shelf reasoning models in a public goods game and compare them with and without explicit reasoning mechanisms.
Outcome: The proposed models reduce cooperation and norm enforcement, favoring individual rationality, and lower collective gains in repeated interactions.
A Generation-based Deductive Method for Math Word Problems (2023.emnlp-main)

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Challenge: Existing generation methods suffer from repeated sub-expression generation and deductive methods are restricted to dealing with binary operations.
Approach: They propose a multivariate directed acyclic graph (mDAG) which generates the topological ordering of mDAg by equipping a generation model with a re-encoder to keep the deductive property but avoid the expensive enumeration of deductive methods.
Outcome: The proposed model performs well on the widely used benchmarks and solves multivariate operators on the CMWPA benchmark.
More Samples or More Prompts? Exploring Effective Few-Shot In-Context Learning for LLMs with In-Context Sampling (2024.findings-naacl)

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Challenge: Existing studies on LLM prompting focus on selecting a better set of data samples inside one single prompt input, but why not design and leverage multiple ICL prompts together to further improve the LLM’s performance?
Approach: They propose a low-resource LLM prompting technique to optimize the construction of multiple ICL prompt inputs to produce confident predictions.
Outcome: The proposed technique can produce confident predictions by optimizing the construction of multiple ICL prompt inputs on four NLI datasets and one QA dataset.
Medical Dialogue System: A Survey of Categories, Methods, Evaluation and Challenges (2024.findings-acl)

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Challenge: Existing medical dialogue systems have significant potential to simplify diagnostic procedure and reduce the cost of collecting information from patients.
Approach: They analyze 325 papers from well-known computer science, natural language processing conferences and journals to find out the major challenges of medical dialog systems.
Outcome: The proposed systems have been surveyed in the medical community but have not been evaluated from a technical perspective.
Teams of LLM Agents can Exploit Zero-Day Vulnerabilities (2026.eacl-long)

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Challenge: Existing frameworks for LLM agents fail to exploit real-world zero-day vulnerabilities . prior work has shown that simple agents can hack mock "capture-the-flag" websites .
Approach: They propose a system of agents with a planning agent that can launch subagents to exploit real-world vulnerabilities.
Outcome: The proposed framework improves over previous frameworks by up to 4.3 on 14 real-world vulnerabilities.
MeasHalu: Mitigation of Scientific Measurement Hallucinations for Large Language Models with Enhanced Reasoning (2026.findings-acl)

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Challenge: Large Language Models (LLMs) exhibit severe hallucinations, which undermine reliability of automated scientific document understanding systems.
Approach: They propose a framework for mitigating scientific measurement hallucinations through enhanced reasoning and targeted optimization.
Outcome: The proposed framework significantly reduces hallucination rates and improves overall accuracy on the MeasEval benchmark.
Stratagem: Learning Transferable Reasoning via Trajectory-Modulated Game Self-Play (2026.acl-long)

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Challenge: Existing self-play approaches to developing general reasoning in language models rely on terminal game outcomes.
Approach: They propose a game-based reasoning transfer model that addresses two barriers to reasoning transfer.
Outcome: The proposed model improves mathematical reasoning, general reasoning, and code generation benchmarks.
VSTAR: A Video-grounded Dialogue Dataset for Situated Semantic Understanding with Scene and Topic Transitions (2023.acl-long)

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Challenge: Existing benchmarks for video-grounded dialogues neglect the intrinsic attributes of multimodal dialogues, such as scene and topic transitions.
Approach: They propose to use a large scale video-grounded scene&topic AwaRe dialogue dataset to study video-based dialogue understanding.
Outcome: The proposed dataset shows that multimodal information and segments are important in video-grounded dialogue understanding and generation.
AutoVecCoder: Teaching LLMs to Generate Explicitly Vectorized Code (2026.findings-acl)

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Challenge: Current development practices face a dichotomy between automation and performance.
Approach: They propose a framework to empower LLMs with the capability of automated explicit vectorization.
Outcome: The proposed framework achieves state-of-the-art performance on the SSE and AVX subsets of SimdBench.
NiuTrans.LMT: Toward Inclusive and Scalable Multilingual Machine Translation with LLMs (2026.acl-long)

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Challenge: Large language models have significantly advanced Multilingual Machine Translation (MMT) yet scaling to many languages while maintaining robust performance across directions remains challenging.
Approach: They propose a strategy to reduce the number of translations in one direction . they propose auxiliary parallel sentences to promote cross-lingual transfer .
Outcome: The proposed model performs on par with or better than substantially larger baselines.
SAM Decoding: Speculative Decoding via Suffix Automaton (2025.acl-long)

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Challenge: Speculative decoding (SD) methods are inefficient and rely on single retrieval resources.
Approach: They propose a retrieval-based speculative decoding method that adapts the suffix automaton for efficient draft generation by utilizing the generating text sequence and static text corpus.
Outcome: The proposed method can find the longest suffix match and can be integrated with existing methods to generalize to broader domains.
P2 Law: Scaling Law for Post-Training After Model Pruning (2025.acl-long)

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Challenge: Pruning has become a widely adopted technique for reducing the hardware requirements of large language models (LLMs).
Approach: They propose to use model pruning techniques to maintain high performance while reducing hardware requirements for large language models (LLMs).
Outcome: The proposed model pruning law can be generalized to larger dataset sizes, larger model sizes, and higher pruning rates, offering valuable insights for resource allocation in pruned LLMs.
MPR-GUI: Benchmarking and Enhancing Multilingual Perception and Reasoning in GUI Agents (2026.acl-long)

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Challenge: Existing GUI benchmarks lack fine-grained diagnostics to identify which capabilities lead to task failures.
Approach: They propose a multilingual P R GUI Benchmark to assess LVLMs' language capabilities . they propose XLI to align non-English hidden states with English ones during inference .
Outcome: The proposed benchmark reveals consistent gaps between English and non-English settings . it reduces the cross-lingual gaps with an average gain of 6.5% in non- English settings compared to static benchmarks .

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