Keyphrases
- document clustering
- text documents
- text mining
- keywords
- clustering method
- topic extraction
- vector space model
- document representation
- natural language
- document collections
- negative matrix factorization
- text categorization
- document clusters
- information extraction
- text classification
- document classification
- clustering algorithm
- bag of words
- machine learning
- ant based clustering
- cluster analysis
- named entities
- topic models
- wordnet
- multiscale
- web search engines
- k means
- pairwise constraints
- information retrieval
- real world
- tolerance rough set