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Zhihan Zhang

24 accepted papers

2026

SpaceVLLM: Endowing Multimodal Large Language Model with Spatio-Temporal Video Grounding Capability

AAAI 2026technical

Multimodal Large Language Models (MLLMs) have shown remarkable progress in temporal or spatial localization tasks, but struggle with joint spatio-temporal video grounding (STVG). We identify two key bottlenecks hindering this capability: (1) the sheer number of visual tokens makes long-range and fin

Cited by 0SourcePDFScholar
2026

When LLMs Encounter Open-world Graph Learning: A Fresh View on Unlabeled Data Uncertainty

ICML 2026poster

Recently, large language models (LLMs) have driven a systematic shift in the graph ML com- munity through the adoption of text-attributed graphs (TAGs). Although a variety of frameworks have been developed, most fail to properly ad- dress the challenge of data uncertainty in open- world environments…

Cited by 0SourceScholar
2025

ALERT: An LLM-powered Benchmark for Automatic Evaluation of Recommendation Explanations

NAACL 2025long

Recommendation explanation systems have become increasingly vital with the widespread adoption of recommender systems. However, existing recommendation explanation evaluation benchmarks suffer from limited item diversity, impractical user profiling requirements, and unreliable and unscalable evaluat…

2025

Aligning Large Language Models with Implicit Preferences from User-Generated Content

ACL 2025long

Learning from preference feedback is essential for aligning large language models (LLMs) with human values and improving the quality of generated responses. However, existing preference learning methods rely heavily on curated data from humans or advanced LLMs, which is costly and difficult to scale…

2025

BigCodeBench: Benchmarking Code Generation with Diverse Function Calls and Complex Instructions

ICLR 2025oral

Task automation has been greatly empowered by the recent advances in Large Language Models (LLMs) via Python code, where the tasks range from software engineering development to general-purpose reasoning. While current benchmarks have shown that LLMs can solve tasks using programs like human develop…

Cited by 609SourcePDFScholar
2025

Enhancing Mathematical Reasoning in LLMs by Stepwise Correction

ACL 2025long

Best-of-N decoding methods instruct large language models (LLMs) to generate multiple solutions, score each using a scoring function, and select the highest scored as the final answer to mathematical reasoning problems. However, this repeated independent process often leads to the same mistakes, mak…

2025

GraphMaster: Automated Graph Synthesis via LLM Agents in Data-Limited Environments

NeurIPS 2025spotlight

The era of foundation models has revolutionized AI research, yet Graph Foundation Models (GFMs) remain constrained by the scarcity of large-scale graph corpora. Traditional graph data synthesis techniques primarily focus on simplistic structural operations, lacking the capacity to generate semantica…

Cited by 0SourceScholar
2025

IHEval: Evaluating Language Models on Following the Instruction Hierarchy

NAACL 2025long

The instruction hierarchy, which establishes a priority order from system messages to user messages, conversation history, and tool outputs, is essential for ensuring consistent and safe behavior in language models (LMs). Despite its importance, this topic receives limited attention, and there is a…

2025

MultiChartQA: Benchmarking Vision-Language Models on Multi-Chart Problems

NAACL 2025long

Multimodal Large Language Models (MLLMs) have demonstrated impressive abilities across various tasks, including visual question answering and chart comprehension, yet existing benchmarks for chart-related tasks fall short in capturing the complexity of real-world multi-chart scenarios. Current bench…

2025

RADAR: Benchmarking Language Models on Imperfect Tabular Data

NeurIPS 2025poster

Language models (LMs) are increasingly being deployed to perform autonomous data analyses. However, their data awareness—the ability to recognize, reason over, and appropriately handle data artifacts such as missing values, outliers, and logical inconsistencies—remains underexplored. These artifacts…

Cited by 0SourcecodeScholar
2025

RepoGraph: Enhancing AI Software Engineering with Repository-level Code Graph

ICLR 2025poster

Large Language Models (LLMs) excel in code generation yet struggle with modern AI software engineering tasks. Unlike traditional function-level or file-level coding tasks, AI software engineering requires not only basic coding proficiency but also advanced skills in managing and interacting with co…

2025

XFinBench: Benchmarking LLMs in Complex Financial Problem Solving and Reasoning

ACL 2025finding

Solving financial problems demands complex reasoning, multimodal data processing, and a broad technical understanding, presenting unique challenges for current large language models (LLMs). We introduce **XFinBench**, a novel benchmark with 4,235 examples designed to evaluate LLM’s ability in solvin…

2024

Analyzing Temporal Complex Events with Large Language Models? A Benchmark towards Temporal, Long Context Understanding

ACL 2024long

The digital landscape is rapidly evolving with an ever-increasing volume of online news, emphasizing the need for swift and precise analysis of complex events.We refer to the complex events composed of many news articles over an extended period as Temporal Complex Event (TCE). This paper proposes a…

2024

Large Language Models Can Self-Correct with Key Condition Verification

EMNLP 2024main

Intrinsic self-correct was a method that instructed large language models (LLMs) to verify and correct their responses without external feedback. Unfortunately, the study concluded that the LLMs could not self-correct reasoning yet. We find that a simple yet effective prompting method enhances LLM p…

2024

Learn Beyond The Answer: Training Language Models with Reflection for Mathematical Reasoning

EMNLP 2024main

Supervised fine-tuning enhances the problem-solving abilities of language models across various mathematical reasoning tasks. To maximize such benefits, existing research focuses on *broadening* the training set with various data augmentation techniques, which is effective for standard single-round…

2024

PLUG: Leveraging Pivot Language in Cross-Lingual Instruction Tuning

ACL 2024long

Instruction tuning has remarkably advanced large language models (LLMs) in understanding and responding to diverse human instructions. Despite the success in high-resource languages, its application in lower-resource ones faces challenges due to the imbalanced foundational abilities of LLMs across d…

2023

Auto-Instruct: Automatic Instruction Generation and Ranking for Black-Box Language Models

EMNLP 2023long findings

Large language models (LLMs) can perform a wide range of tasks by following natural language instructions, without the necessity of task-specific fine-tuning. Unfortunately, the performance of LLMs is greatly influenced by the quality of these instructions, and manually writing effective instruction…

Cited by 0SourceScholar
2023

Large Language Models are Built-in Autoregressive Search Engines

ACL 2023findings

Document retrieval is a key stage of standard Web search engines. Existing dual-encoder dense retrievers obtain representations for questions and documents independently, allowing for only shallow interactions between them. To overcome this limitation, recent autoregressive search engines replace th…

2022

A Unified Encoder-Decoder Framework with Entity Memory

EMNLP 2022main

Entities, as important carriers of real-world knowledge, play a key role in many NLP tasks.We focus on incorporating entity knowledge into an encoder-decoder framework for informative text generation. Existing approaches tried to index, retrieve, and read external documents as evidence, but they suf…

2022

Diversifying Content Generation for Commonsense Reasoning with Mixture of Knowledge Graph Experts

ACL 2022findings

Generative commonsense reasoning (GCR) in natural language is to reason about the commonsense while generating coherent text. Recent years have seen a surge of interest in improving the generation quality of commonsense reasoning tasks. Nevertheless, these approaches have seldom investigated diversi…

2022

Retrieval Augmentation for Commonsense Reasoning: A Unified Approach

EMNLP 2022main

A common thread of retrieval-augmented methods in the existing literature focuses on retrieving encyclopedic knowledge, such as Wikipedia, which facilitates well-defined entity and relation spaces that can be modeled. However, applying such methods to commonsense reasoning tasks faces two unique cha…

2020

SPAN: Spatial Pyramid Attention Network for Image Manipulation Localization

ECCV 2020poster

Tehchniques for manipulating images are advancing rapidly; while these are helpful for many useful tasks, they also pose a threat to society with their ability to create believable misinformation. We present a novel, Spatial Pyramid Attention Network (SPAN) for detection and localization of multiple…