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#machine learning Preprint Sep 2026

Reward-Aligned Reweighting for On-Policy Distillation

On-policy distillation (OPD) trains a student language model with dense feedback from a stronger teacher on student-generated trajectories. Yet standard OPD weights token-level distillation terms uniformly, implicitly treating local teacher preference as a proxy for correction utility. A decision's task value, however,...

Hao Xu, Junwei Su, Lan-Song Diao et al. · 0 citations
Review Aug 2026

Structuring Semantic Embeddings for Principle Evaluation: A Prototype-Guided Contrastive Learning Approach

This paper introduces Prototype-Guided Contrastive Learning (PGCL), a prototype-guided geometric regularization module built on top of frozen text embeddings, and introduces Prototype-Guided Contrastive Learning (PGCL), a prototype-guided geometric regularization module built on top of frozen text embeddings.

Che Shen, Junwei Su, Ling-Peng Kong et al. · 1 citation

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