Keyphrases
- negative matrix factorization
- document clustering
- nonnegative matrix factorization
- latent semantic space
- latent topics
- principal component analysis
- keywords
- text documents
- sparse representation
- document collections
- web documents
- document representation
- matrix factorization
- n gram
- text mining
- co occurrence
- training data
- clustering method
- information retrieval systems
- image classification
- multi label
- signal processing
- spectral clustering
- active learning
- vector space model
- k means
- clustering algorithm
- information retrieval
- data sets
- semantic information
- retrieval systems
- similarity measure
- machine learning