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Long Xing

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#artificial intelligence Preprint Oct 2026

ResOPD: Tail Residualization for Sparse On-Policy Distillation

ResOPD is established as an efficient, plug-and-play variance reduction primitive for sparse on-policy distillation, which provides unbiased full-vocabulary reverse KL gradient estimation under on-policy sampling, with substantial variance reduction under the same sparse payload in the evaluated settings.

Peng-Hui Yang, Long Xing, Xuan-Lang Dai et al. · 0 citations
Review Sep 2026

WorldReward: Reward Modeling for Camera-Conditioned World Models

This work presents WorldReward, a VLM-based pairwise preference reward model that unifies action-consistency and visual-quality evaluation for camera-conditioned world models, and introduces WorldReward-Bench, a human-annotated benchmark measuring reward-model agreement with human preferences across action consistency,...

Yi-Bin Wang, Ze-Han Wang, Junshu Tang et al. · 0 citations

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