Bo Zheng

NextGen: A Multi-Objective Generative Re-ranking Framework for Taobao Recommendation

Reranking is a critical stage in e-commerce recommendation that reorders items to optimize the final list as a whole. Existing generative reranking methods suffer from two limitations: (1) they rely on next-item exposure prediction as supervision, neglecting page-level multi-objective signals such as total clicks or tr...

TSSR-Beta: Enhancing Billion-Scale E-Commerce Semantic Retrieval via Representation-Level Interaction

Semantic retrieval in e-commerce search aims to identify a compact candidate set from billion-scale product catalogs with both high recall and low latency. Dual-Encoders dominate this stage due to their efficient dot-product similarity, but this formulation limits model expressiveness and fails to capture fine-grained...

Navigating the Infinite Dynamic Web Space: Effective In-Context Exploration via Cognitive Multi-Agent Collaboration