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Mingrui Chen

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#small language model Preprint Sep 2026

VLM-in-Sandbox: Visual Workspaces for Agentic Visual Reasoning

Across seven benchmarks and four base VLMs, VLM-in-Sandbox achieves the highest sample-weighted average accuracy among Vanilla VLM, Append-only Sandbox, and the proposed method, and is identified as a central abstraction for sandboxed VLM agents.

He-Xiong Yang, Mingrui Chen, Jie Cao et al. · 0 citations
#natural language process... Preprint Sep 2026

OmniEdu: Open Foundation Models for Learning and Teaching

Educational foundation models must solve problems, understand curriculum structure, diagnose learner difficulties, and provide appropriate instructional support. Existing educational language models often focus on either problem solving or tutoring, with training mixtures organized by source or task rather than capabil...

Hao Liang, Qi-Han Lin, Mei-Yi Qiang et al. · 0 citations
#machine learning Preprint Sep 2026

DataFlex-RL: An Evaluation Platform for RLVR Data Policies

Data policies for reinforcement learning with verifiable rewards (RLVR) determine which rollouts are used, how strongly they are weighted, and which domains contribute to subsequent training batches. We introduce DataFlex-RL, an evaluation platform for comparing these choices under a common GRPO recipe. Our primary exp...

Hao Liang, Mingrui Chen, Hengyi Feng et al. · 0 citations

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