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Xu-Kun Luan

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#machine learning Preprint Sep 2026

ForgetMimic: Motion Unlearning for Reinforcement Learning Humanoid Control

Experimental results demonstrate that ForgetMimic effectively eliminates memory of designated motions while maintaining the normal operation of all other motions, and identifies and resolves two key training mechanisms in robot control that lead to unlearning failure.

Xu-Kun Luan, Zhong-Xiang Lei, Chen Gong et al. · 0 citations
Jul 2026

Is External Database Protection Static in Retrieval-Augmented Generation? Rethinking Privacy Preservation under Dynamic Queries

A Prompt-Aware Dynamic Hierarchical Differential Privacy framework (PA-HDP) is proposed, which performs a prompt-aware risk hierarchy to dynamically assess privacy risks under different queries and applies adaptive sensitive entity replacement and exponential mechanism-based text selection to provide differentiated pri...

Gang Zhang, Mingyu Tian, Xu-Kun Luan et al. · 0 citations
#machine learning Preprint Aug 2026

MemCatalyst: Amplifying Data Auditing on Vision-Language Models via Data Poisoning

This work proposes MemCatalyst, a set of data poisoning tools, aiming to amplify the data auditing performance on VLMs, and forces VLMs to over-learn specific inconsistencies between image features and textual semantics during training, thereby increasing their susceptibility to membership information auditing.

Xukun Luan, Jinyan Liu, Yuhui Gong et al. · 0 citations

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