Authors

Xin Tao

Publications 2

Preprint Open access

WorldAlign: Decoupled 4D Reward for World-Consistent Video Generation

Jing He, Kaixin Ding, Xingye Tian et al. · 2026

Faithful visual world simulation requires generated videos to maintain 4D world consistency, encompassing both static and dynamic consistency. Static consistency requires coherent 3D structure in static environments across viewpoints, while dynamic consistency requires plausible subject motion and consistent appearance …

Preprint Open access

ORCA: The Annealed Spectral Conditioning Optimizer for Faster, Better LLM Training

Yuanshi Liu, Boyuan Jiang, Liang Hou et al. · 2026

Modern LLM optimizers such as Muon often produce weight matrices with higher effective rank than Adam, yet further spectral control has delivered only modest gains. We identify a tension behind this result: concentrated spectra can suppress gradient directions in coupled weight matrices and slow optimization, while con …

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