AI	Artificial intelligence
CBM	Condition-based monitoring
CPs	Centrifugal pumps
CNN	Convolutional neural network
FD	Fault diagnosis
FT	Fourier transform STFT—Short-term Fourier transform
S	transform: Stockwell transform
TFD	Time-frequency-domain
WT	Wavelet transform
$\omega$	Wavelet
$w^L$	Set of trainable parameters at Lth layer
$f_L$	Activation function at Lth layer