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Yanqiao Chen

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#artificial intelligence Preprint Oct 2026

PermVLA: Factorization Order as a Regularizer for VLA Learning

Vision-language-action (VLA) policies commonly learn action chunks through a fixed left-to-right (LTR) factorization, although the same expert trajectory distribution admits many valid chain-rule factorizations. We identify factorization order as an overlooked regularization choice and introduce causally anchored permu...

Yan-Qiao Chen, Yu-Han Rui, Dong-Sheng Hou et al. · 0 citations
#artificial intelligence Preprint Aug 2026

BCPPO: Bachelier-Inspired Constrained Proximal Policy Optimization for Tail-Risk-Aware Safe Reinforcement Learning

BCPPO (Bachelier-Inspired Constrained Proximal Policy Optimization), a proximal policy optimization (PPO) method, supports a practical balance among reward, caution around cost predictions that vary across trained critics, and policy-only deployment.

Dong-Sheng Hou, Yan-Qiao Chen, Yu-Han Rui · 0 citations

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