Hierarchical discriminating sparse coding for weak fault feature extraction of rolling bearings.
Jinyang JiaoMing ZhaoJing LinKaixuan LiangPublished in: Reliab. Eng. Syst. Saf. (2019)
Keyphrases
- sparse coding
- feature extraction
- image classification
- dictionary learning
- natural images
- unsupervised learning
- sparse representation
- feature space
- linear combination
- image representation
- discriminative power
- generative model
- discriminative dictionary
- deep belief networks
- fault diagnosis
- sparse codes
- image patches
- face recognition
- visual words
- wavelet transform
- feature vectors
- feature selection
- single image super resolution
- neural network
- dimensionality reduction
- pattern recognition
- object category recognition
- bag of words
- principal component analysis
- manifold learning
- feature representation
- image processing
- numerical solution
- data sets
- multiscale
- higher order