Author

Kai-Xun Jiang

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Preprint Sep 2026

Beyond Token Importance: Preserving Spatial Scaffolds for Efficient Vision-Language-Action Inference

Existing VLA pruning strategies primarily select individual visual tokens according to task-level semantic relevance, while overlooking the spatial information required for robotic manipulation. To examine this limitation, we construct a simple Stride baseline that uniformly samples tokens along the flattened one-dimen...

Jia-Yu Chen, Shuyong Gao, Jing-Kai Jia et al. · 0 citations

#machine learning May 2026

DiffusionOPD: A Unified Perspective of On-Policy Distillation in Diffusion Models

Theoretically, the OPD framework is lifted from discrete tokens to continuous-state Markov processes, deriving a closed-form per-step KL objective that unifies both stochastic SDE and deterministic ODE refinement via mean-matching, which provides lower variance and better generality compared to conventional PPO-style p...

Quanhao Li, Jun-Qiu Yu, Kai-Xun Jiang et al. · arXiv.org · 34 citations · ⚡10