Keyphrases
- information retrieval
- clustering algorithm
- information retrieval systems
- hierarchical clustering
- document collections
- query expansion
- data points
- relevance feedback
- information filtering
- search engine
- document retrieval
- ir evaluation
- subspace clustering
- vector space model
- text retrieval
- data clustering
- test collection
- information extraction
- cluster analysis
- question answering
- neural network
- similarity measure
- language model
- language processing
- knowledge discovery