Keyphrases
- text retrieval
- information retrieval systems
- document collections
- retrieval systems
- query expansion
- retrieval model
- information retrieval
- inverted file
- retrieval effectiveness
- document retrieval
- cross language
- user queries
- relevant documents
- test collection
- retrieval quality
- latent semantic indexing
- automatic query expansion
- query terms
- relevance feedback
- xml retrieval
- information access
- image retrieval
- term weighting
- text retrieval systems
- retrieved documents
- structured documents
- pseudo relevance feedback
- language model
- keywords