A Method for Determining Intrinsic Mode Function Number in Variational Mode Decomposition and Its Application to Bearing Vibration Signal Processing

Table 8

CC under different noise amplitudes.

Signal code	K	Correlation coefficient				Threshold range
S13	3	0.9684	0.2421	0.0604		(0.0237, 0.0596)
	4	0.9684	0.2421	0.0596	0.0237
S14	3	0.9673	0.2392	0.0663		(0.0307, 0.0657)
	4	0.9673	0.2392	0.0657	0.0307
S15	3	0.9825	0.0850	0.0871		(0.0612, 0.0835)
	4	0.9588	0.2488	0.0835	0.0612
S16	3	0.9742	0.1121	0.1049		(0.0911, 0.1004)
	4	0.9741	0.1104	0.1004	0.0911