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Shi-Cheng Li

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#machine learning Preprint Sep 2026

Groupwise Agentic Grading and Advantage Redistribution for Code Agent RL

Reinforcement learning (RL) for code agents often uses executable tests to provide binary rewards. With these rewards, Group Relative Policy Optimization (GRPO) assigns identical advantages to test-passing trajectories within each rollout group, overlooking differences in implementation quality and adherence to task re...

Jin-Hao Dong, Liang Zhao, Zi-Hao Yue et al. · 0 citations
#artificial intelligence Preprint Sep 2026

CodeMidas: Scaling Agentic Coding RL Environments from Code Itself

Training capable coding agents via reinforcement learning (RL) requires diverse tasks with reliable verifiers. Open-source codebases offer a rich source of such tasks, while existing methods typically rely on development artifacts such as issues and commits, limiting the range of tasks that can be extracted. To better...

Bo-Wen Ye, Lei Li, Shi-Cheng Li et al. · 0 citations
#computer vision Preprint Aug 2026

Semantic Head Specialization Guides Hybrid ViT Attention for Multimodal LLMs

This work studies ViT attention heads and finds they differentiate into object- and background-specialist roles, a pattern most pronounced under full attention, and proposes SHS-Index to quantify this specialization, showing that it distinguishes full-attention from chunk-window ViTs, and finds that it strongly tracks...

Chenyu He, Lei Li, Shi-Cheng Li et al. · 0 citations
Preprint Aug 2026

What Proves You Wrong: Benchmarking Language Models on Falsifiable Research Ideation

The Lit2Test benchmark centers on a six-field contract organized around a falsifying outcome, so that every proposal precommits the observation that would prove it wrong, making its quality decidable in the first place rather than merely arguable.

Zi-Yue Wang, Aomufei Yuan, Yi-Ran Yao et al. · 0 citations

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