Yanchen Yin — Papers on Cortexa

arxivcs.CV2026-07-16

HoloGeo: Mitigating Landmark Bias in Geo-localization via Evidence-Driven Reasoning

Pengcheng Zhou, Xuanyu Liu, Yanchen Yin, Bobo Li, Shengqiong Wu, Mong-Li Lee, et al.

Recent advances in Vision-Language Models (VLMs) have significantly improved image geo-localization, yet existing models remain susceptible to landmark bias, causing them to overlook geographical cues or form spurious correlations, ultimately resulting in inaccurate localization.…

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arxivcs.CRcs.AI2026-06-26

Robust Harmful Features Under Jailbreak Attacks: Mechanistic Evidence from Attention Head Specialization in Large Language Models

Yanchen Yin, Dongqi Han, Linghui Li

Jailbreak attacks bypass LLM safety alignment, yet their mechanisms remain poorly understood. We provide evidence that attacks do not comprehensively eliminate safety features, but instead selectively suppress specific attention heads. We identify two functionally differentiated…

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