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Zhenhong Sun

3 papers indexed

arxivcs.RO2026-07-04

Look Before You Leap: Distilling Tree Search into Action Evaluation for Frozen VLA Models

Xinyi Xie, Zican Hu, Zhanyu Liu, Yicheng Dong, Wenhao Wu, Zhenhong Sun, et al.

Vision-Language-Action (VLA) models acquire broad embodied capabilities through large-scale pretraining, yet their generalization remains far more fragile than that of LLMs and VLMs. The prevailing remedy, post-training via supervised fine-tuning or reinforcement learning, improv…

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arxivcs.AI2026-07-04

Bridging Interleaved Multi-Modal Reasoning as a Unified Decision Process

Zican Hu, Xuyang Hu, Yiming Liu, Zuwei Long, Wei Liu, Yunzhuo Hao, et al.

Unified multi-modal models (UMMs) have shown promising interleaved text-image reasoning capabilities, yet effectively optimizing such multi-turn generation via reinforcement learning (RL) remains an open challenge. Existing approaches apply RL exclusively to text steps, relegatin…

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arxivcs.AIcs.CV2026-06-25

Look-Before-Move: Narrative-Grounded World Visual Attention in Dynamic 3D Story Worlds

Jiaming Bian, Bingliang Li, Yuehao Wu, Pichao Wang, Zhi Wang, Hailan Ma, et al.

As embodied AI and world models increasingly operate in dynamic 3D environments, visual perception must move beyond passively interpreting given observations toward actively deciding what to observe. We study this problem through camera planning in dynamic 3D story worlds, where…

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