Deep Transfer Learning-Based Fault Diagnosis for Gearbox under Complex Working Conditions

Table 4

Data sets groups.

Group	Training set	Testing set
1	6 Hz–5 V	Multi-A
2	6 Hz–8 V	Multi-B
3	10 Hz–5 V	Multi-C
4	10 Hz–8 V	Multi-D
5	14 Hz–5 V	Multi-E
6	14 Hz–8 V	Multi-F
7	14 Hz–8 V	Single-G (6 Hz–3 V)
8	6 Hz–8 V	Single-H (10 Hz–3 V)
9	10 Hz–8 V	Single-I (14 Hz–3 V)