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Author

Er-Han Zhang

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#artificial intelligence Preprint Oct 2026

Learning to Retrieve via Reinforcement Learning in Embedding Space

Dense retrieval models are typically trained with contrastive objectives that learn effective representations but do not directly optimize retrieval metrics or downstream task performance. To address this problem, we introduce RELER (REinforcement LEarning for Retrieval), a reinforcement learning framework that enables...

Qi Liu, Feng-Ming Liang, Yi-Qun Chen et al. · 0 citations
#artificial intelligence Preprint Sep 2026

RankBuffer: Efficient Ranking-Based Rewards for Open-Ended Generation

Open-ended generation lacks canonical answers, making pointwise rewards difficult to calibrate for group-based reinforcement learning. Directly ranking same-query rollouts provides a more suitable relative reward signal, but existing ranking-based reward methods can incur substantial judging cost. We introduce RankBuff...

Zi-Xuan Yang, Yi-Qun Chen, Qi Liu et al. · 0 citations

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