Author

Ruimao Zhang

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#machine learning Preprint Oct 2026

Trust-Calibrated VLA Policy Post-Training with Evolving Imagination

Vision-Language-Action (VLA) models are often pretrained via imitation learning, making reinforcement learning (RL) post-training important when deployment moves beyond demonstration coverage. Existing refinement paradigms expose a reliability--efficiency tension: model-free refinement avoids simulator bias but is inte...

Wen-Zhan Li, Yi-Ran Qin, Heng Zhou et al. · 0 citations

Preprint Aug 2026

MA-VLA: Multi-Arm Vision-Language-Action Model for Collaboration and Compositional Generalization

MA-VLA decomposes cooperative behavior into mid-level atomic prompts and allocates them to individual arms, enabling explicit subgoal specification and compositional reuse across tasks and indicates that structured, per-arm atomic action assignment offers a practical route to scalable generalization in multi-arm embodi...

Zai-Bin Zhang, Jun-Lan Xiao, Zhong-Bo Zhang et al. · 4 citations