Author

Congkai Xie

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#computer vision Preprint Sep 2026

InfiMed2: A Generalist Medical Multimodal Foundation Model from Contextual Evidence and Stability-Aware Supervision

Recent medical multimodal models have benefited from larger corpora, broader modality coverage, and stronger reasoning-oriented training, yet effective data design across continued pretraining (CPT) and post-training remains challenging. Medical sources vary substantially in structure, granularity, and information dens...

Guang-Hao Zhu, Ze-Yu Liu, Zhitian Hou et al. · 0 citations

#artificial intelligence Preprint Sep 2026

Routing Drift Alone Does Not Diagnose Failure in Merged MoE LLMs

Model merging efficiently combines specialized large language models (LLMs) without joint retraining, but can substantially alter expert routing in Mixture-of-Experts (MoE) models. Such \emph{routing drift} is often interpreted as routing failure, raising a fundamental question that remains unclear: \emph{does routing...

Yuan-Yi Wang, Yang-Gan Gu, Su Lu et al. · 0 citations

Preprint Aug 2026

Evaluating Counterfactual Sensitivity to Patient Information in Medication-Safety Reasoning

MedPIC-Bench makes conditional rule application measurable and highlights the limitations of static medication-safety accuracy for assessing patient-specific reliability among medical-specific LLMs, whose average CF performance trails that of general LLMs.

Zhitian Hou, Yuhang Liu, Peng-Kai Wang et al. · 0 citations