Papers by Xiao Shi

48 papers
Say What You Mean! Large Language Models Speak Too Positively about Negative Commonsense Knowledge (2023.acl-long)

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Challenge: Large language models (LLMs) have been studied for their ability to store and utilize positive knowledge.
Approach: They propose to use a constrained keywords-to-sentence generation task and a Boolean question answering task to probe large language models on negative commonsense knowledge.
Outcome: The proposed tasks show that LLMs fail to generate valid sentences grounded in negative commonsense knowledge, yet they can correctly answer yes-or-no questions.
Multiview Clickbait Detection via Jointly Modeling Subjective and Objective Preference (2023.findings-emnlp)

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Challenge: Existing clickbait detection models rely on analyzing the objective semantics of posts or correlating posts with article content only, but fail to identify and exploit the manipulation intention of clickbaiting from a user’s subjective perspective.
Approach: They propose a multiview clickbait detection model to model subjective and objective preferences simultaneously to capture clickbaiting from a user's subjective perspective.
Outcome: The proposed model outperforms state-of-the-art models on two real-world datasets and shows that it integrates subjective and objective preferences simultaneously.
Step-level Verifier-guided Hybrid Test-Time Scaling for Large Language Models (2025.emnlp-main)

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Challenge: Recent training-based TTS methods, such as continued reinforcement learning, have surged in popularity, while training-free TTS approaches are gradually fading from prominence.
Approach: They propose a fine-grained sequential scaling method guided by process verification that integrates training-free TTS methods with other classical parallel scaling methods at the step level.
Outcome: Experiments on five instruction-tuned large language models (LLMs) show that training-free TTS methods can extend reasoning performance boundaries.
FuxiTranyu: A Multilingual Large Language Model Trained with Balanced Data (2024.emnlp-industry)

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Challenge: Large language models exhibit significant performance discrepancies between high- and low-resource languages.
Approach: They present an open-source multilingual LLM with 8 billion parameters and a multilingual instruction dataset.
Outcome: The proposed model achieves consistent multilingual representations across languages.
Modeling Multi-mapping Relations for Precise Cross-lingual Entity Alignment (D19-1)

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Challenge: Entity alignment aims to find entities in different knowledge graphs (KGs) that refer to the same real-world object.
Approach: They propose to use dot product-based functions to define dot products over embeddings to better capture semantics of 1-N, N-1 and N-N relations.
Outcome: The proposed framework outperforms existing methods on multilingual datasets.
HermEs: Interactive Spreadsheet Formula Prediction via Hierarchical Formulet Expansion (2023.acl-long)

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Challenge: HermEs is a spreadsheet formula prediction language that is difficult for Excel users without programming experience to master.
Approach: They propose a hierarchical approach to formula prediction via HiEraRchical forMulet ExpanSion . they propose generating formulas in a fixed order using hierarchically generated formulas .
Outcome: The proposed approach improves formula prediction accuracy by guaranteeing correct grammar and streamlining token-level decoding with high-level Formulet.
SEGMENT+: Long Text Processing with Short-Context Language Models (2024.emnlp-main)

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Challenge: Existing frameworks that increase context window do not guarantee robust performance across long input tasks.
Approach: They propose a framework that enables language models to handle extended inputs within limited context windows efficiently.
Outcome: The framework improves performance on long-document question-answering and Needle-in-a-Haystack tasks.
TexSmart: A System for Enhanced Natural Language Understanding (2021.acl-demo)

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Challenge: TexSmart supports fine-grained named entity recognition (NER) Large-scale fine-granular entity types are expected to provide richer semantic information for downstream NLP applications.
Approach: They introduce TexSmart, a text understanding system that supports fine-grained named entity recognition (NER) and enhanced semantic analysis functionalities.
Outcome: The proposed system supports fine-grained named entity recognition (NER) and enhanced semantic analysis functions.
GAPO: Learning Preferential Prompt through Generative Adversarial Policy Optimization (2025.acl-long)

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Challenge: Existing methods for achieving this require a limited understanding of constraints and can be hallucinating or brittle.
Approach: They propose a framework that combines adversarial training dynamics with an encoder-only reward model to progressively learn and adapt to increasingly complex constraints.
Outcome: Extensive experiments show that GAPO significantly outperforms existing methods like PPO, DPO, and KTO in fine-grained constraints.
MathCoder-VL: Bridging Vision and Code for Enhanced Multimodal Mathematical Reasoning (2025.findings-acl)

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Challenge: Large Language Models (LMMs) struggle with simple tasks such as geometry, e.g., arithmetic, and reasoning.
Approach: They propose to leverage code as supervision for cross-modal alignment . they propose to use FigCodifier and ImgCode-8.6M to synthesize novel mathematical figures .
Outcome: The proposed model surpasses GPT-4o and Claude 3.5 Sonnet in the geometry problem-solving subset of MathVista, achieving improvements of 8.9% and 9.2%.
Program Transfer for Answering Complex Questions over Knowledge Bases (2022.acl-long)

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Challenge: Program induction for complex questions over knowledge bases relies on a large number of parallel question-program pairs for the given KB, but the gold program annotations are usually lacking, making learning difficult.
Approach: They propose an approach to leverage program annotations on rich KBs as external supervision signals to aid program induction for low-resourced KB.
Outcome: The proposed approach outperforms SOTA methods on ComplexWebQuestions and WebQuestionSP.
iMOVE : Instance-Motion-Aware Video Understanding (2025.findings-acl)

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Challenge: Recent advances in Video Large Language Models have led to rapid development, significantly enhancing the capture of overall video semantics and achieving remarkable performance in general video understanding tasks.
Approach: They propose a large-scale instance-motion-aware video instruction-tuning dataset iMOVE that utilizes Event-awful Spatiotemporal Efficient Modeling to retain informative instance spatiotemporal motion details while maintaining computational efficiency.
Outcome: The proposed model excels in video temporal understanding and general video understanding.
i-Code V2: An Autoregressive Generation Framework over Vision, Language, and Speech Data (2024.findings-naacl)

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Challenge: i-Code V2 is one of the first models capable of generating natural language from any combination of Vision, Language, and Speech data.
Approach: They propose to create a model that can generate natural language from any combination of Vision, Language, and Speech data.
Outcome: i-Code V2 matches or outperforms state-of-the-art single- and dual-modality baselines on 7 multimodal tasks.
E-KAR: A Benchmark for Rationalizing Natural Language Analogical Reasoning (2022.findings-acl)

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Challenge: Existing benchmarks to test word analogy do not reveal the underneath process of analogical reasoning of neural models.
Approach: They propose an explanation benchmark for analogical reasoning using a Civil Service exam . they use a free-text explanation scheme to explain whether an analogy should be drawn .
Outcome: The proposed benchmark is very challenging for state-of-the-art models, it is found.
InsLogicBench: An Argumentation Logic Grounded Benchmark for Complex Insurance Claims Adjudication (2026.acl-long)

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Challenge: Existing benchmarks for insurance claims adjudication are limited to information retrieval or simple multiple-choice setups.
Approach: They propose a benchmark that provides complete reasoning traces linking factual inputs, relevant policy clauses, and final verdicts.
Outcome: The proposed benchmark shows that models often produce correct decisions but fail to provide precise justifications, highlighting a critical discrepancy between decision accuracy and logical reasoning capabilities.
A Dashboard for Mitigating the COVID-19 Misinfodemic (2021.eacl-demos)

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Challenge: a new public dashboard aims to understand the impact of the COVID-19 misinfodemic on Twitter . the dashboard uses a curated catalog of COVId-19 related facts and debunks of misinformation .
Approach: They propose a public dashboard that matches tweets with COVID-19 misinformation . they also propose experiments to analyze the spread of misinformation on twitter .
Outcome: The proposed dashboard uses a curated catalog of COVID-19 related facts and debunks misinformation . it shows the most prevalent information from the catalog among Twitter users in user-selected geographic regions .
Translation or Recitation? Calibrating Evaluation Scores for Machine Translation of Extremely Low-Resource Languages (2026.acl-short)

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Challenge: Existing studies show that performance across low-resource settings is variable, resulting in a significant barrier for the MT community.
Approach: They propose to use FRED Difficulty Metrics to contextualize reported performance across different language pairs to determine whether breakthroughs reported in other contexts are artifacts of benchmark collection.
Outcome: The proposed metrics explain a significant portion of result variability rather than model capability.
Negation Triplet Extraction with Syntactic Dependency and Semantic Consistency (2024.lrec-main)

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Challenge: Negation understanding is crucial to many downstream tasks such as sentiment analysis, question answering, Web search and natural language inference.
Approach: They propose a novel negation triplet extraction task which aims to extract negation subject along with negation cue and scope.
Outcome: The proposed model is based on a generative pretrained language model with a multi-task learning framework and achieves the best performance compared to baselines.
Memory-Guided Hard Data Augmentation for Multimodal Named Entity Recognition (2026.findings-acl)

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Challenge: Existing methods for Named Entity Recognition (NER) ignore the internal state of the target model.
Approach: They propose a framework to repair model-specific errors by using a model-based approach . they employ cross-validation to identify model- specific Hard Data and a memory tree to induce macro-level error patterns from micro-level failures.
Outcome: The proposed framework yields significant performance gains on Twitter and other platforms.
Skeletons Matter: Dynamic Data Augmentation for Text-to-Query (2025.emnlp-main)

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Challenge: Existing studies focus on a single query language, resulting in limited generalizability . a new task paradigm is proposed to unify semantic parsing tasks across different query languages .
Approach: They propose a task paradigm that unifies parsing tasks across query languages . they identify query skeletons as a shared optimization target of Text-to-Query tasks .
Outcome: The proposed method achieves state-of-the-art performance using only a small amount of synthesized data.
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.
AnaMeta: A Table Understanding Dataset of Field Metadata Knowledge Shared by Multi-dimensional Data Analysis Tasks (2023.findings-acl)

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Challenge: Tabular data analysis is performed everyday across various domains.
Approach: They propose to use a dataset of 467k tables with supervision labels for four types of field metadata.
Outcome: The proposed framework improves the understanding capability of tabular models by incorporating distribution and knowledge information.
FormulaReasoning: A Dataset for Formula-Based Numerical Reasoning (2026.findings-acl)

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Challenge: Existing datasets for numerical reasoning often lack explicit knowledge of formulas . current datasets do not provide process supervision information, resulting in incomplete reasoning .
Approach: They propose a benchmark for formula-based numerical reasoning with 5,324 questions . they provide annotations in English and Chinese and a formula database as an external knowledge source .
Outcome: The proposed model includes 5,324 questions requiring calculations grounded in external physics principles.
Praetor: A Fine-Grained Generative LLM Evaluator with Instance-Level Customizable Evaluation Criteria (2025.acl-long)

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Challenge: Existing evaluation methods are inadequate to evaluate large language models (LLMs).
Approach: They propose a fine-grained generative LLM evaluator with instance-level customazable evaluation criteria that can be used to evaluate large language models.
Outcome: The proposed model outperforms existing LLM evaluators and instruction-tuned LLMs on multiple benchmarks and sets new SOTA results.
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.
Thinking with Reasoning Skills: Fewer Tokens, More Accuracy (2026.acl-industry)

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Challenge: Reasoning LLMs often spend tokens on long intermediate reasoning traces when solving new problems.
Approach: They propose to store reusable reasoning skills distilled from extensive deliberation and trial-and-error exploration and retrieve these skills at inference time to guide future reasoning.
Outcome: The proposed approach reduces reasoning tokens while improving overall performance on coding and mathematical reasoning tasks.
Hallucination Mitigation in Natural Language Generation from Large-Scale Open-Domain Knowledge Graphs (2023.emnlp-main)

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Challenge: Graph-to-text models trained on small-scale datasets or datasets with limited variety of graph shapes are not adequate for more realistic large-scale, open-domain settings.
Approach: They propose a novel approach that, given a graph-sentence pair in GraphNarrative, trims the sentence to eliminate portions that are not present in the corresponding graph.
Outcome: The proposed model can be trained on existing datasets and is available on github.
RoCBert: Robust Chinese Bert with Multimodal Contrastive Pretraining (2022.acl-long)

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Challenge: Large-scale pretrained language models have achieved SOTA results on NLP tasks but are vulnerable to adversarial attacks especially for logographic languages like Chinese.
Approach: They propose a pretrained Chinese Bert that is robust to various forms of adversarial attacks like word perturbation, synonyms, typos, etc.
Outcome: The proposed model outperforms baselines on 5 Chinese NLU tasks without sacrificing performance on clean testsets.
ThinkNote: Enhancing Knowledge Integration and Utilization of Large Language Models via Constructivist Cognition Modeling (2026.findings-eacl)

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Challenge: Large Language Models (LLMs) exhibit suboptimal behaviors and inconsistencies when exposed to unfamiliar external information, underscoring their limitations in effectively leveraging such knowledge.
Approach: They propose a framework that enhances the external knowledge utilization of Large Language Models through a two-stage constructivist cognitive modeling process.
Outcome: The proposed framework achieves a 10% improvement over baseline methods on various question-answering benchmarks.
Dynamic Prefix-Tuning for Generative Template-based Event Extraction (2022.acl-long)

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Challenge: Experimental results show that our model achieves competitive results with the state-of-the-art classification-based model OneIE on ACE 2005.
Approach: They propose a generative template-based event extraction method with dynamic prefix . they integrate context information with type-specific prefixes to learn a context-specific name for each context .
Outcome: The proposed method achieves competitive results with state-of-the-art model OneIE on ACE 2005 and performs well on ERE.
SciCustom: A Framework for Custom Evaluation of Scientific Capabilities in Large Language Models (2026.acl-long)

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Challenge: Existing evaluations of large language models fail to reflect fine-grained capabilities . existing benchmarks are manually curated or domain-generic, limiting scalability and alignment with real use cases.
Approach: They propose a framework that allows custom construction of benchmarks from large-scale scientific data to evaluate application-specific scientific capabilities in LLMs.
Outcome: The proposed framework reveals fine-grained differences in scientific capabilities that standard benchmarks overlook . it allows custom construction of benchmarks from large-scale scientific data to evaluate application-specific capabilities in LLMs.
REVEALER: Reinforcement-Guided Visual Reasoning for Element-Level Text-Image Alignment Evaluation (2026.acl-long)

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Challenge: Existing methods for text-to-image alignment evaluation rely on coarse-grained metrics or static Question Answering pipelines that lack fine-grounded interpretability and struggle to reflect human preferences.
Approach: They propose a reinforcement-guided visual reasoning framework for element-level text-to-image alignment evaluation.
Outcome: The proposed framework achieves state-of-the-art results on four benchmarks and surpasses the strong proprietary Gemini 3 Pro and Training-based baselines.
Natural Language to Code Generation in Interactive Data Science Notebooks (2023.acl-long)

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Challenge: Data scientists use computational notebooks to perform data wrangling and analytic tasks.
Approach: They build a benchmark program that synthesizes programs given NL intents from users by using a Python code language model.
Outcome: The proposed model outperforms public code LMs in a dataset of 1078 code generation problems using the pandas data analysis framework in data science notebooks.
Natural Logic at the Core: Dynamic Rewards for Entailment Tree Generation (2025.findings-acl)

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Challenge: Existing approaches to generating entailment trees lack logical consistency . static reward structures or intricate dependencies within multi-step reasoning are often ignored .
Approach: They propose a method that integrates natural logic principles into reinforcement learning to guide entailment tree generation.
Outcome: Experiments on EntailmentBank show that the proposed method improves interpretability and generalization.
Bone Soups: A Seek-and-Soup Model Merging Approach for Controllable Multi-Objective Generation (2025.acl-long)

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Challenge: Existing approaches focus on merging language models tuned on single objectives . existing approaches ignore the impacts of competing objectives on model tuning .
Approach: They propose a model merging approach that seeks a series of backbone models and merges them according to user preferences.
Outcome: The proposed approach exhibits strong controllability and Pareto optimality in controllable multi-objective generation.
Combining Static Word Embeddings and Contextual Representations for Bilingual Lexicon Induction (2021.findings-acl)

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Challenge: Bilingual Lexicon Induction (BLI) aims to map words in one language to their translations in another.
Approach: They propose a mechanism to combine static word embeddings and contextual representations to utilize the advantages of both paradigms.
Outcome: The proposed method improves performance on supervised and unsupervised BLI benchmarks on all language pairs by average improving 3.2 points over baselines.
Learning Visually-Grounded Semantics from Contrastive Adversarial Samples (C18-1)

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Challenge: Existing frameworks for grounding distributional representations of texts on the visual domain are limited . effective and efficient grounding of distributional embeddings remains challenging .
Approach: They propose to ground distributional representations of texts on the visual domain using visual-semantic embeddings.
Outcome: The proposed model improves on a diverse set of downstream tasks and defends known-type adversarial attacks.
Neural Natural Logic Inference for Interpretable Question Answering (2021.emnlp-main)

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Challenge: Existing question answering models are based on textual entailment tasks . prior work has focused on QA on premise-based questions .
Approach: They propose a neural-symbolic QA approach that integrates natural logic reasoning within deep learning architectures towards developing effective question answering models.
Outcome: The proposed model outperforms previous work on multiple-choice science questions . it integrates natural logic reasoning within deep learning architectures to build proof paths .
Deciphering the Impact of Pretraining Data on Large Language Models through Machine Unlearning (2024.findings-acl)

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Challenge: Existing studies have suggested that the composition of the pretraining corpus exerts a significant impact upon the performance of LLMs.
Approach: They analyze the impact of 48 datasets from 5 major categories of pretraining data of Large Language Models and measure their impacts on LLMs using benchmarks about nine major categories.
Outcome: The proposed analysis provides insights into the organization of data to support more efficient pretraining of Large Language Models.
Controllable Mixed-Initiative Dialogue Generation through Prompting (2023.acl-short)

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Challenge: Mixed initiative dialogue systems allow all interacting agents to initiate actions to control the interaction.
Approach: They propose to prompt large language models as a drop-in replacement for fine-tuning on conditional generation.
Outcome: The proposed prompts improve fine-tuning and ground truth responses . the results show that generated responses are high .
Boosting Event Extraction with Denoised Structure-to-Text Augmentation (2023.findings-acl)

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Challenge: Existing methods for event extraction neglect grammatical incorrectness, structure misalignment, and semantic drifting . et al., 2004; Ahn, 2006) show that the proposed method generates more diverse text representations for event extracting compared with the state-of-the-art.
Approach: They propose a framework for event extraction that generates additional training data and iteratively selects the effective subset from the generated training data.
Outcome: The proposed method generates more diverse representations of training data and achieves comparable results with the state-of-the-art.
Dialect-SQL: An Adaptive Framework for Bridging the Dialect Gap in Text-to-SQL (2025.emnlp-main)

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Challenge: Existing Text-to-SQL research focuses on specific database systems, limiting adaptability to different dialects.
Approach: They propose a framework that employs Object Relational Mapping (ORM) code as an intermediate language to bridge this gap.
Outcome: The proposed framework outperforms existing methods that generate SQL queries directly.
AgencyBench: Benchmarking the Frontiers of Autonomous Agents in 1M-Token Real-World Contexts (2026.acl-long)

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Challenge: Existing benchmarks focus on single agentic capability, failing to capture long-horizon real-world scenarios.
Approach: They propose a benchmark that evaluates 6 agentic capabilities across 32 real-world scenarios.
Outcome: Experiments show that closed-source models outperform open-source model (48.4% vs 32.1%) integrating models with advanced scaffolds to form autonomous agents is a paradigm shift.
Similarity = Value? Consultation Value-Assessment and Alignment for Personalized Search (2025.emnlp-main)

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Challenge: Existing methods rely on semantic similarity to align historical consultations with current queries due to the absence of ‘value’ labels, but this lacks exploration of needs in user consultations.
Approach: They propose a consultation value assessment framework that evaluates historical consultations from three novel perspectives: (1) Scenario Scope Value, (2) Posterior Action Value, and (3) Time Decay Value.
Outcome: The proposed model outperforms baselines on public and commercial datasets on both retrieval and ranking tasks.
Online Iterative Self-Alignment for Radiology Report Generation (2025.acl-long)

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Challenge: Existing methods for RRG rely on supervised fine-tuning based on data pairs of radiological images and corresponding radiologist-annotated reports.
Approach: They propose a method that performs supervised fine-tuning on data pairs of radiological images and corresponding radiologist-annotated reports.
Outcome: The proposed method surpasses existing methods and achieves state-of-the-art performance across multiple evaluation metrics.
Gen-SQL: Efficient Text-to-SQL By Bridging Natural Language Question And Database Schema With Pseudo-Schema (2025.coling-main)

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Challenge: Recent studies have shifted paradigms and leveraged Large Language Models (LLMs) to tackle the challenging task of Text-to-SQL.
Approach: They propose a framework that leverages large language models to generate SQL queries . they exploit prior knowledge from the LLM to enhance embedding-based retriever .
Outcome: The proposed method improves embedding-based retriever and reduces cost.
UniCreative: Unifying Long-form Logic and Short-form Sparkle via Reference-Free Reinforcement Learning (2026.findings-acl)

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Challenge: Existing alignment paradigms for creative writing use static reward signals and supervised data.
Approach: They propose a constraint-aware reward model that synthesizes query-specific criteria to provide fine-grained preference judgments.
Outcome: The proposed framework aligns models with human preferences across content quality and structural paradigms without supervised fine-tuning and ground-truth references.
Navigating the OverKill in Large Language Models (2024.acl-long)

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Challenge: Recent studies have highlighted a tendency among large language models to refuse to answer benign queries.
Approach: They propose a model-agnostic approach to reduce excessive attention to harmful words like ‘kill’ and a method to decode the next-token predictions by contrastive decoding.
Outcome: The proposed approach reduces the refusal rate by 20% while having little impact on safety.

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