Author

Zhihao Sun

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Preprint Sep 2026

Rethinking Representations for World-Action Modeling

World-action models jointly learn robot policies and predict future observations, making the representation space an interface between control and prediction. We study the design of this space through controlled comparisons, finding that neither reconstruction fidelity nor pre-trained perceptual features alone ensure e...

Hao-Yi Jiang, Liu Liu, Xin-Jiang Wang et al. · 0 citations

HandWorld: Hand-Centric Unified Video Action Generation

This work introduces HandWorld, a unified generative framework that focuses on hand-object interaction and jointly models ego-centric videos and hand actions and learns shared cross-domain conditions through a dual-branch condition network that integrates information from both video and action domains.

Zhihao Sun, Zhi-Ying Du, Xitong Yang et al. · 1 citation