Digital Twin Inspired Intelligent Bearing Fault Diagnosis Method Based on Adaptive Correlation Filtering and Improved SAE Classification Model

Table 7

Result of using different activation function.

Activation function	Accuracy (%)	Run time (s)	Convergent iteration
Sigmoid	97.5 ± 2.237	10.91	900 ± 59
Tan	99.5 ± 1	10.85	412 ± 25
ReLTanh	99 ± 1.658	21.62	453 ± 39
Isigmoid	99.5 ± 1	19.33	389 ± 36