Authors

Zhen Zhao

Publications 3

Preprint Open access

InstanceBench: Diagnosing Referential Reasoning and Target Identity in Referring Expression Segmentation

Referring Expression Segmentation (RES) links natural-language descriptions to pixel-level object masks. Yet standard evaluation provides limited insight into instance-level referential reasoning: it does not systematically distinguish referential logics, test target preservation across valid grounding paths, or separa …

Preprint Open access

Unbiased Top-$k$ Estimation for On-Policy Distillation

Linjian Meng, Siyuan Gan, Yuhan Li et al. · 2026

On-policy distillation (OPD) is becoming an important component of large language model (LLM) post-training for transferring the reasoning capability of a strong teacher LLM to a weaker student LLM. OPD trains the student by minimizing the reverse KL divergence between the teacher and the student via rollouts generated …

Co-authors