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Pengkai Wang

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#computer vision Preprint Sep 2026

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

This work introduces InfiMed2, a family of 4B and 27B generalist medical multimodal foundation models built around stage-aware data design, and curates a 55.68B-token corpus that combines broad clinical knowledge with context-rich biomedical visual evidence through source-specific processing.

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

Findings show that routing drift alone is insufficient evidence of routing failure, and source-informed corrections must be judged by their task-level intervention effects, and proposes Selective Router Repair as a case study, and finds that source-specialist token-likelihood advantages do not reliably identify benefic...

Yuan-Yi Wang, Yang-Gan Gu, Su Lu et al. · 0 citations
Open access Aug 2026

An efficient graph-transformer operator for learning physical dynamics with manifolds embedding

An efficient graph-transformer operator, named PhysGTO, is shown for learning physical dynamics through explicit manifold embeddings in both physical and latent spaces, showing strong flexibility, scalability, and generalization across diverse physical systems.

Peng-Wei Liu, Xingyu Ren, Peng-Kai Wang 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
Preprint Aug 2026

DART: Decoded Attention over Recurrent States for Efficient Long-Context Sequence Modeling

DART (Decoded Attention over Recurrent sTates), which retains the chunk state contributions produced by the Mamba-2 chunked scan as chunk state memories, decodes token-conditioned keys and values from these memories, and performs state-memory attention (SMA) over the resulting KV pairs.

Yixiao Qian, Song Chen, Pengkai Wang et al. · 0 citations

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