Author

Zhentao Song

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Preprint Aug 2026

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

Embedding-based retrieval (EBR) is pivotal in e-commerce search but often struggles with complex semantics. While recent methods often fine-tune large language models (LLMs) for representation learning, they typically lack robust mechanisms for handling complex and implicit semantics. While Retrieval-GRPO (R-GRPO) rece...

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

Book Open access Jul 2026

TMallGS: Scaling Unified Feature and Sequence Modeling for Generative E-commerce Search

In large-scale industrial search and ranking systems, Click-Through Rate (CTR) prediction is undergoing a paradigm shift from traditional Deep Learning Recommendation Models (DLRM) toward unified, compute-intensive Transformer architectures. The primary motivation for this transition is to leverage Model FLOPs Utilizat...

Zhentao Song, Yufeng Gao, Xingye Fang et al. · Proceedings of the 32nd ACM... · 0 citations