Author

Pengyi Jiang

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Preprint Oct 2026

DISCERN: Identifiable Disease Evidence for Generalizable Medical Multimodal Learning

Clinical multimodal models can learn enrollment shortcuts shared across modalities and fail on new cohorts. We model these data through a latent structural causal model: disease state and background factors generate physiology through shared mechanisms, while cohorts differ in selection and measurement. Holding acquisi...

Xiao-Guang Zhu, Peng-Yi Jiang, Jun-Cen Guo et al. · 0 citations

Preprint May 2026

Semantic Cooperative Games for Contribution Attribution in LLM-Based Multi-Agent Systems

The Semantic Shapley Value (SSV) is defined to allocate contribution over semantic support logic, and SLIC is introduced, a single-trajectory algorithm that constructs the semantic hypergraph, recovers minimal semantic supports, applies Boolean absorption, and computes SSV without rerunning agent subsets.

Pengyi Jiang, Xiaoguang Zhu, Quanyan Zhu · 0 citations