Keyphrases
- negative matrix factorization
- topic modeling
- topic models
- matrix factorization
- nonnegative matrix factorization
- document clustering
- latent dirichlet allocation
- sparse representation
- text mining
- collaborative filtering
- text classification
- principal component analysis
- latent structure
- spectral clustering
- databases
- text documents
- probabilistic latent semantic analysis
- maximum likelihood
- image processing
- data sets