Deep Transfer Learning Method Based on 1D-CNN for Bearing Fault Diagnosis

Table 4

Parameters and category of compared method.

Category	Method	Features	Transfer manner
1	CNN	Learned features	No transfer
2	TCA [22]	Handcrafted features	MMD
	CORAL [31]	Handcrafted features	Covariances
3	WD-DTL [35]	Learned features	Wasserstein distance
4	DDC [36]	Learned features	MMD
	DAN [37]	Learned features	MMD
5	Our method	Learned features	Covariances