Author

Yu-Chen Li

3 papers indexed here

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Aug 2026

MWMOTE-MLLM: A cluster-level difficulty-aware oversampling multimodal large language model framework for imbalanced fault diagnosis of rolling bearings in horizontal reactors

The horizontal reactor serves as a critical piece of equipment in petrochemical production and operates under extreme conditions, including high temperature, high pressure, and strong corrosion. Under such conditions, rolling bearings are prone to faults caused by excessive vibration and lubrication failure, which may...

Wanyao Zhang, Yu-Chen Li, Xin Pan et al. · Structural Health Monitoring · 0 citations

#machine learning Preprint Sep 2026

Backpropagated Output Momentum: Relocating Optimizer History from Parameters to Task Space

Optimizer momentum is usually stored as a parameter-sized moving average of past gradients, which makes history costly and fixes each past signal in the coordinates in which it was computed. We introduce Backpropagated Output Momentum (BOM), which instead stores a compact moving average of prediction errors at the mode...

Yu-Chen Li, Zong-Qi Fan, Nguyen H. Tran et al. · 0 citations

#machine learning Preprint Sep 2026

Routing in Gradient Space: Balanced Usage Is Not Expert Specialization

Sparse expert models can distribute traffic evenly while still grouping incompatible training signals within the same experts. We study routing as a gradient-partitioning problem and introduce gradient-aligned routing (GAR), whose load-normalized router objective rewards grouping observations with aligned gradients. On...

Yu-Chen Li, Ming-Yue Du, Zong-Qi Fan et al. · 0 citations