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Author

Ben Fei

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Preprint Aug 2026

Diagnosing and narrowing the simulation-to-real gap in powder X-ray diffraction with a wet-dry agentic loop

Powder X-ray diffraction (PXRD) is the routine probe of crystalline matter, yet its analysis is the rate-limiting step as laboratories automate acquisition. Deep-learning analyzers excel on simulated patterns and degrade on measured ones. This simulation-to-real gap is structural, not additive: synthetic denoising give...

Shaoguang Wang, Weiyu Guo, Ben Fei et al. · 0 citations
Aug 2026

FengYuan: An End-to-End Global Weather Forecasting Model Driven by Multi-Source Observational Data

The complete end-to-end system of FengYuan achieves forecast quality very close to the reanalysis-driven version while consistently outperforming IFS throughout the 10-day forecast period, demonstrating that FengYuan successfully bridges observations to forecasts while maintaining high accuracy.

Zhao-Ming Liang, Yang Li, Ya-Qiang Wang et al. · 0 citations
2025

LoRA-EnVar: Parameter-Efficient Hybrid Ensemble Variational Assimilation for Weather Forecasting

Experimental results show that LoRA-EnVar significantly improves assimilation accuracy over models assuming static background error distribution and achieves comparable or better performance than full finetuning while reducing the number of trainable parameters by three orders of magnitude.

Yi Xiao, Hang Fan, Kun Chen et al. · 3 citations

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