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Author

Jingxiao Yang

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#artificial intelligence Preprint Sep 2026

DEEPO: Dual-Entropy Enhanced Policy Optimization for Hallucination in MLLMs

Reinforcement learning (RL) is widely used to sharpen reasoning in multimodal large language models (MLLMs), yet its effect on hallucination is uneven. We trace this to two weak points in the \emph{correction chain} from reward to parameter update. At the rollout level, hard queries---those with high semantic entropy--...

Ying-Xuan Zhuang, Miao Pan, Wang-Jie Gan et al. · 0 citations
#artificial intelligence Preprint Sep 2026

When and Where to Trust the Teacher: Unifying On-Policy Distillation and GRPO through Entropy-Calibrated Credit Assignment

UECR-GRPO is introduced, which integrates verifier and teacher signals within a single GRPO-style update at both the response and token levels and uses the signed teacher--old-policy token gap to redistribute the verifier-derived component.

Jie Zhang, Jing-Xiao Yang, Zhehao Huang et al. · 1 citation
#artificial intelligence Preprint Sep 2026

Dual-Axis Policy Optimization for LLM Agents: Bayesian Feedback Attribution and Trajectory Mass Normalization

Reinforcement learning for LLM agents involves two distinct optimization di- mensions: how environment feedback is exploited within a trajectory, and how complete trajectories are aggregated across a batch. We formulate these dimen- sions as Intra-Trajectory Feedback Attribution and Inter-Trajectory Objec- tive Aggrega...

Ying-Xuan Zhuang, Bin-He Yu, Jing-Xiao Yang et al. · 1 citation

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