Keyphrases
- text retrieval
- current status
- information retrieval
- state university
- document collections
- retrieval quality
- multimedia retrieval
- retrieval systems
- retrieval model
- latent semantic indexing
- cross language
- inverted file
- document retrieval
- image retrieval
- principal component analysis
- database
- query expansion
- database systems
- keyword extraction
- automatic query expansion
- co occurrence
- retrieval strategies
- feature extraction