A Feature Extraction Method of Wheelset-Bearing Fault Based on Wavelet Sparse Representation with Adaptive Local Iterative Filtering

Table 3

Comparison among the three methods.

Indicator	Method
	ALIF-SBAKW	ALIF-OMPK	Fast kurtogram
Number of harmonics	9	8	5
CF	14.47	11.08	5.62
IF	57.77	17.29	7.58
Kurtosis	59.26	20.44	5.57
ESK	22.43	20.00	19.88