Keyphrases
- text retrieval
- blind relevance feedback
- automatic query expansion
- document retrieval
- geographic information retrieval
- cross language
- document collections
- latent semantic indexing
- information retrieval
- image retrieval
- query expansion
- inverted file
- retrieval model
- multimedia retrieval
- retrieval quality
- language model
- textual information retrieval
- retrieval systems
- information retrieval systems
- trec collections