Fault feature extraction of rolling element bearings based on wavelet packet transform and sparse representation theory.
Cong WangMeng GanChang'an ZhuPublished in: J. Intell. Manuf. (2018)
Keyphrases
- sparse representation
- wavelet packet transform
- feature extraction
- face recognition
- image classification
- sparse coding
- dictionary learning
- wavelet transform
- shift invariant
- dimensionality reduction
- signal processing
- wavelet packet
- texture features
- image processing
- image patches
- image representation
- wavelet coefficients
- feature vectors
- frequency domain
- generative model
- analog circuits
- bag of words
- high dimensional data
- image features
- multiresolution
- feature space
- multiscale
- subband
- unsupervised learning
- neural network
- low dimensional
- denoising
- test images
- semi supervised
- knn
- feature selection