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Zongxiong Chen

4 accepted papers

2025

HD-NDEs: Neural Differential Equations for Hallucination Detection in LLMs

ACL 2025long

In recent years, large language models (LLMs) have made remarkable advancements, yet hallucination, where models produce inaccurate or non-factual statements, remains a significant challenge for real-world deployment. Although current classification-based methods, such as SAPLMA, are highly efficien…

2025

Internal Activation Revision: Safeguarding Vision Language Models Without Parameter Update

AAAI 2025technical

Warning: This paper contains offensive content that may disturb some readers. Vision-language models (VLMs) demonstrate strong multimodal capabilities but have been found to be more susceptible to generating harmful content compared to their backbone large language models (LLMs). Our investigation r…

2025

VSCBench: Bridging the Gap in Vision-Language Model Safety Calibration

ACL 2025finding

The rapid advancement of vision-language models (VLMs) has brought a lot of attention to their safety alignment. However, existing methods have primarily focused on model undersafety, where the model responds to hazardous queries, while neglecting oversafety, where the model refuses to answer safe q…

2023

A Survey on Dataset Distillation: Approaches, Applications and Future Directions

IJCAI 2023poster

Dataset distillation is attracting more attention in machine learning as training sets continue to grow and the cost of training state-of-the-art models becomes increasingly high. By synthesizing datasets with high information density, dataset distillation offers a range of potential applications, i…