Intelligent Roller Bearing Fault Diagnosis in Industrial Internet of Things

Table 3

Means and standard deviations of the MSE and RCMMSE of 1/f noise at a scale factor of 20.

Data length	MSE		RCMMSE
	Means	Standard deviations	Means	Standard deviations
500	—	—	2.1323	0.5234
1000	—	—	2.0185	0.2667
1500	—	—	2.0185	0.1761
2000	—	—	1.9373	0.1230