Author

Ge Chen

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Preprint Sep 2026

TRACER: Trajectory-Aligned Learning for Multi-Turn User Simulation

TRACER is proposed, a multi-turn user simulator that models evolving user intent and aligns simulated trajectories with real ones, and the Dynamic Marketing Benchmark is introduced, revealing that higher response quality does not necessarily correspond to higher conversion rates.

Ge Chen, Ruo-Tong Pan, Zhi-Rui Yang et al. · 0 citations

Book Open access Aug 2026

Structured Task Alignment for Multi-Objective Learning to Rank

Industrial recommender systems typically integrate multiple objectives—such as clicks, watch time, likes, and follows—to perform a holistic ranking. However, effectively fusing these diverse tasks to reflect overall user satisfaction remains a formidable challenge. Existing approaches struggle with distributional discr...

Qing Luo, Ge Chen, Huayi Shen et al. · Proceedings of the 32nd ACM... · 0 citations