Yue-Zhai Zhao

Unsupervised Cross-Condition Fault Diagnosis Using Dual-Branch Time–Frequency Adaptive Fusion and MMD Alignment

Cross-condition bearing diagnosis is challenged by simultaneous changes in transient impacts, spectral-energy patterns, and source–target feature distributions as speed and load vary. Handcrafted indicators and single-representation networks often capture only part of this coupled variation, whereas global alignment al...