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Yan Song

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#artificial intelligence Preprint Oct 2026

A self-learning scientific agent for X-ray diffraction

A central challenge for scientific agents is to turn analytical experience into reusable expertise grounded in physical evidence. Here we introduce Gan Jiang, a self-learning agent for powder X-ray diffraction built on a diffraction-analysis ecosystem we developed: XMatcher, XQueryer, XDecomposer and WPEM. Together, th...

Bin Cao, Hui-Chi Zhou, Ru-Yun Yang et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Information-Time Proximal Policy Optimization

RLVR has substantially improved the reasoning capabilities of LLMs. However, existing methods typically parameterize temporal progression in the Markov Decision Process by token-by-token generation, despite the highly non-uniform information flow along autoregressive trajectories. In this paper, we propose InfoPPO, whi...

Yong-Cheng Zeng, Xin-Yu Cui, Yan Song et al. · 0 citations
#machine learning Preprint Aug 2026

Large Discovery Models: Empirically-grounded Model-Based Open-Ended Search

This work introduces the Large Discovery Model (LDM), an empirically grounded recurrent architecture that couples a generative model with a Bayesian non-parametric reward surrogate model, yielding an uncertainty-aware value that guides candidate generation, refinement, and selection.

Zhong-Wei Yu, Yan Song, Xue Yan et al. · 0 citations
#artificial intelligence Preprint Aug 2026

DART-SD: Diamond-topology Aware Retrieval and Tuning for Self-Distillation of Multi-Turn Tool-Calling Agents

This work proposes DART-SD (Diamond-topology Aware Retrieval and Tuning for Self-Distillation), a novel framework that shifts the paradigm from global forcing to topology-guided localized correction, and significantly outperforms traditional full-trajectory baselines.

Hangrui Xu, Jiarui Wang, Yang Yang et al. · 0 citations

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