Author

Yun Fu

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#artificial intelligence Preprint Oct 2026

RACER: Reflective Agent Coupling Query Interpretation and Tool-Based Retrieval for Frame Selection in Long Video Understanding

Video large language models (Vid-LLMs) excel at diverse video-language tasks by reasoning over selected frames. However, frame selection for long videos remains challenging, as it requires retrieving relevant frames distributed across segments from a large candidate pool given complex queries. This paper investigates d...

Yiyang Huang, Yi-Tian Zhang, Yi-Zhou Wang et al. · 0 citations

#machine learning Preprint Aug 2026

Learn What's Left, Not What's Mastered: Saturation Aware Advantage Reweighting for Multi-Reward Policy Optimization

Saturation Aware Advantage Reweighting for Multi-Reward Policy Optimization (SA-MRPO), which standardizes each reward objective independently and adaptively discounts its contribution according to a batch-level estimate of objective saturation, and dynamically reallocates optimization effort toward under-optimized obje...

Yi-Xuan Wang, Yi-Fei Chen, Haichao Zhang et al. · 3 citations · ⚡1