Author

Zhi Hou

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Preprint Sep 2026

PF-RL: Progress Field Reinforcement Learning via Goal-Conditioned Value Geometry for Vision-Language-Action Models

Reinforcement Fine-Tuning~(RFT) has emerged as a promising paradigm for improving Vision-Language-Action~(VLA) policies, yet sparse task-level outcomes provide limited credit for intermediate transitions, especially in long-horizon manipulation. A natural approach is to model intermediate task progress and use it as de...

Yun-Peng Qing, Yi-Lun Kong, Si-Xu Lin et al. · 0 citations

Preprint Aug 2026

StreamPI: Streaming Multimodal Temporal Modeling for Vision-Language-Action Models

StreamPI is proposed, a streaming multimodal temporal modeling framework that equips single-frame VLA with temporal reasoning capability without introducing any additional parameters and seamlessly inherits pretrained single-frame weights and supports flexible single-frame and multi-frame inference.

Zhe Liu, Jing-Hua Hou, Yuxiang Lu et al. · 4 citations · ⚡1