Author

Dong Chen

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#artificial intelligence Preprint Sep 2026

Learn from the Gap: Differential-Aware Advantage Pruning with Adaptive Rollout Sampling for GRPO

This work proposes FastRL, a novel plug-and-play reinforcement learning framework that simultaneously improves training efficiency and the effectiveness of policy learning, and introduces an advantage-aware pruning strategy to selectively preserve high-advantage trajectories while maximizing inter-trajectory gradient d...

Jia-Hua Yang, Zhiwei Yang, Xian-Peng Zhang et al. · 0 citations

Jul 2026

MMLDSum-LLM: Multimodal Long-Document Summarization with Visual-Alignment and Keyword-Aware

This work introduces MMLDSum-Bench, a high-quality benchmark for multimodal long-document summarization, and proposes MMLDSum-LLM, a reproducible two-stage training framework that combines supervised fine-tuning with visual-alignment weighted loss and keyword-aware weighted loss, followed by GRPO with a multi-objective...

Xianpeng Zhang, Jiahuai Yang, Dong Chen et al. · arXiv.org · 0 citations