Author

Jian-Bo Zhu

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#reinforcement learning Aug 2026

SSR-GRPO: Integrating Supervision and Semantic IDs into Reinforcement Learning for Dense Retrieval in E-commerce

This paper proposes Supervised Retrieval-GRPO with Semantic Identifiers (SSR-GRPO), a dual-perspective framework for relevance assessment that leverages both Semantic Identifiers produced by quantization learning and dense representation vectors to generate more unbiased relevance scores.

Guangxin Song, Xingye Fang, Ming-Min Jin et al. · ACM International Conference... · 0 citations

Preprint Sep 2026

VARG: Value-Aware and Ranking-Aligned Generative Retrieval for Dynamic E-commerce Search

VARG, a generative retrieval system for Tmall App search that directly admits generated item candidates to the existing final ranker and improves GMV, per-user IPV, and PCTR and online shopping-guide query evaluations further show that VARG maintains competitive relevance with a smaller candidate quota.

Xiao-Peng Chu, Jian-Bo Zhu, Ming-Min Jin et al. · 1 citation