Author

Yiwen Zhao

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#machine learning Preprint Sep 2026

ORPG: Reconciling Multiple Reward Objectives through Objective-wise Policy Gradients

Multi-reward policy optimization requires a joint update that reflects both the learning signals and the intended relationships among objectives. We introduce Objective-wise Reconciled Policy Gradient (ORPG), which constructs a separate clipped policy objective for each reward and reconciles the resulting gradients int...

Shi-Cheng Fang, Yi-Wen Zhao, Wen-Bo Tian et al. · 0 citations

Preprint Aug 2026

Towards Better Agents for Multi-Turn User Interaction: The Next User Turn Is More Than Context

Next-turn user reactions provide actionable local credit for improving multi-turn user-interacting agents and improves the nine-domain $\tau$-family average across three independently trained runs.

Yi-Wen Zhao, Zhihao Wen, Yuchen Mao et al. · 1 citation