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Xiaohu Li

4 accepted papers

2025

Aligning VLM Assistants with Personalized Situated Cognition

ACL 2025long

Vision-language models (VLMs) aligned with general human objectives, such as being harmless and hallucination-free, have become valuable assistants of humans in managing visual tasks. However, people with diversified backgrounds have different cognition even in the same situation. Consequently, they…

2025

CAVGAN: Unifying Jailbreak and Defense of LLMs via Generative Adversarial Attacks on their Internal Representations

ACL 2025finding

Security alignment enables the Large Language Model (LLM) to gain the protection against malicious queries, but various jailbreak attack methods reveal the vulnerability of this security mechanism. Previous studies have isolated LLM jailbreak attacks and defenses. We analyze the security protection…

2024

Predicting Fall Events by a Spatio-Temporal Topological Network with Multiple Wearable Sensors

ICASSP 2024accepted

A key challenge in sensor-based fall prediction is the fact that a fall event can often occur in various configurations of fall poses together with their own spatio-temporal dependencies. This leads us to define a spatio-temporal model to explicitly characterize these internal configurations of pose…

Cited by 0SourceScholar
2020

Stochastically Dominant Distributional Reinforcement Learning

ICML 2020poster

We describe a new approach for managing aleatoric uncertainty in the Reinforcement Learning (RL) paradigm. Instead of selecting actions according to a single statistic, we propose a distributional method based on the second-order stochastic dominance (SSD) relation. This compares the inherent disper…

Cited by 26SourcePDFScholar