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Lingzhou Xue

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#artificial intelligence Preprint Sep 2026

MLToolBench: Learning Tool-Augmented Agents for Machine Learning Development

Machine learning engineering (MLE) agents have made substantial progress, but learning through ML experimentation remains costly in time and computation. Synthetic environments reduce these costs while introducing variations in data and experimental settings that require task-specific diagnosis. Access to diagnostic to...

Xin Yu, Li-Zhu Zhang, Jiamu Bai et al. · 0 citations
#artificial intelligence Preprint Aug 2026

Provably Efficient Federated Reinforcement Learning with Linear Function Approximation and Logarithmic Communication Cost

Fed-LSVI is proposed, the first provably efficient federated algorithm for online reinforcement learning with linear function approximation in episodic Markov decision processes and achieves a regret bound of $\widetilde{\mathcal O}(\sqrt{Md^3H^4T})$, matching the best-known regret for multi-agent online reinforcement...

Zi-Han Liang, Haochen Zhang, Ling-Zhou Xue · 0 citations
Preprint Aug 2026

Difficulty-Aware Semantic-ID Optimization for Generative Recommendation

Difficulty-Aware Semantic-ID Optimization (DASO), a tree-aware post-training method that addresses failure mode as an online rollout-allocation problem and improves over MiniOneRec-style GRPO on 11 of 12 metrics and achieves the best result on 9 of 12 metrics.

Xin Yu, Stephen Li, S. Aghaei et al. · 0 citations

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