YOLO-PAS: Detection of Mixed Impurity Particles in Transformer Oil Based on Lens-Free Holographic Imaging and Improved YOLO - Xue, L.; Li, B.; Sun, X.; Yang, C.; Li, J.; Jiang, C.; Cui, H. (IEEE Transactions on Instrumentation and Measurement, Instrumentation and Measurement, IEEE Transactions on, IEEE Trans. Instrum. Meas., 2025)