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Yi Zhan

7 accepted papers

2026

An Empirical Study of Memory Poisoning Defenses for LLM Agents

ICML 2026poster

Large Language Model (LLM) agents use memory to learn from past interactions. However, this reliance on memory introduces a critical security risk: an adversary can inject seemingly harmless records into an agent's memory to manipulate its future behavior. This vulnerability is characterized by two …

Cited by 0SourceScholar
2026

CLIP-Guided Unsupervised Semantic-Aware Exposure Correction

ICASSP 2026poster

Improper exposure often leads to severe loss of details, color distortion, and reduced contrast. Exposure correction still faces two critical challenges: (1) the ignorance of object-wise regional semantic information causes the color shift artifacts; (2) real-world exposure images generally have no…

Cited by 0SourcePDFScholar
2026

Forget What Has Seen: Selective Concept Unlearning in Segmentation Foundation Models

AAAI 2026technical

Machine unlearning (MU) has emerged as a critical tool for removing sensitive or personal information from machine learning models, empowering individuals with the right to be forgotten. While MU has achieved success in classification and generative tasks, whether this technique can be effectively a

Cited by 0SourcePDFScholar
2025

CoderAgent: Simulating Student Behavior for Personalized Programming Learning with Large Language Models

IJCAI 2025

Personalized programming tutoring, such as exercise recommendation, can enhance learners' efficiency, motivation, and outcomes, which is increasingly important in modern digital education. However, the lack of sufficient and high-quality programming data, combined with the mismatch between offline e

2025

Graph-Reward-SQL: Execution-Free Reinforcement Learning for Text-to-SQL via Graph Matching and Stepwise Reward

EMNLP 2025

Reinforcement learning (RL) has been widely adopted to enhance the performance of large language models (LLMs) on Text-to-SQL tasks. However, existing methods often rely on execution-based or LLM-based Bradley–Terry reward models. The former suffers from high execution latency caused by repeated dat

2025

MEgoHand: Multimodal Egocentric Hand-Object Interaction Motion Generation

NeurIPS 2025poster

Egocentric hand-object motion generation is crucial for immersive AR/VR and robotic imitation but remains challenging due to unstable viewpoints, self-occlusions, perspective distortion, and noisy ego-motion. Existing methods rely on predefined 3D object priors, limiting generalization to novel obje…

Cited by 0SourcecodeScholar
2025

Towards Database-Free Text-to-SQL Evaluation: A Graph-Based Metric for Functional Correctness

COLING 2025main

Execution Accuracy and Exact Set Match are two predominant metrics for evaluating the functional correctness of SQL queries in modern Text-to-SQL tasks. However, both metrics have notable limitations: Exact Set Match fails when queries are functionally equivalent but syntactically different, while E…

Cited by 0SourcePDFScholar