Author

Ruiming Liang

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Preprint Aug 2026

Routing Before Looking: Query-Adaptive Evidence Acquisition for Long-form Video Understanding

Long-form video understanding remains challenging for video agents due to the mismatch between query demands and evidence acquisition strategies. Although recent planning-before-perception methods outperform query-agnostic pipelines, they often rely on a single dominant strategy, either generation-based strategy or ret...

Tianyu Wang, Xu-Ying Wu, Yuxiang Ma et al. · 2 citations

Jul 2026

Don't Mix Rewards, Mix Policies: Policy Decomposition and Optimization for Multi-Reward RL

This work proposes PRISM, a new multi-reward RL framework built upon the idea of policy-space decomposition and composition, which alleviates the potential conflict during multi-reward policy optimization, while enabling controllability during inference by flexible policy composition.

Ruiming Liang, Yin-Jie Zhong, Yizhen Yuan et al. · arXiv.org · 1 citation