Keyphrases
- nonnegative matrix factorization
- negative matrix factorization
- probabilistic latent semantic indexing
- matrix factorization
- data representation
- active set
- least squares
- principal component analysis
- spectral clustering
- nonnegative matrix
- interior point
- document clustering
- sparsity constraints
- objective function
- sparse representation
- pattern recognition
- computer vision
- machine learning
- image classification
- support vector machine
- relational databases
- pairwise