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Yuxin Xiao

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#artificial intelligence Preprint Oct 2026

Recurrent Harness for Agentic Continual Learning

Language model agents increasingly operate over long interaction streams, requiring online adaptation to distribution shifts through continual learning. However, existing agent harnesses typically either evolve their states only through forward information flow or rely on additional replay or validation data for harnes...

Yu-Xin Xiao, Zhi-Yun Lu, Jian-Yu Wang et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Reinforcement Learning over Patient Trajectories for Clinical Reasoning in EHR Foundation Models

This work proposes a reinforcement learning (RL) fine-tuning framework that treats EHR foundation models as generative policies over patient trajectories, and finds that RL fine-tuning consistently improves over pre-trained backbones and strong baselines.

Yu-Xin Xiao, Sheng Zhang, C. Singh et al. · 0 citations
Review Aug 2026

MatrAIx: Simulating the World with 8.3 Billion Persona Agents

MatrAIx is introduced, a population-scale simulated-user evaluation infrastructure for testing AI systems and digital products with heterogeneous users and provides an end-to-end infrastructure for evaluating AI systems and digital products with diverse simulated human users.

Xiaomin Li, Yuexing Hao, Jian Hou et al. · 1 citation

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