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. 2023 Aug 30;23(17):7546. doi: 10.3390/s23177546

Figure 14.

Figure 14

ML model test confusion matrix, signals from CWRU database. Each class has 129 elements. The dataset includes only I, O, and B classes due to the absence of Noise class in the database. The high misclassification in the B class is attributed to the lack of periodicity in the real signals, preventing accurate classification.