Keyphrases
- nonnegative matrix factorization
- feature extraction
- principal component analysis
- matrix factorization
- negative matrix factorization
- probabilistic latent semantic indexing
- data representation
- active set
- least squares
- nonnegative matrix
- spectral clustering
- feature vectors
- fault diagnosis
- feature selection
- dimensionality reduction
- original data
- face recognition
- image processing
- sparsity constraints
- document clustering
- objective function
- neural network
- pattern recognition
- feature space
- relational databases
- semi supervised
- information extraction
- recommender systems