Keyphrases
- retrieval model
- trec collections
- effective retrieval
- language model
- test collection
- language modeling
- information retrieval systems
- document retrieval
- retrieval effectiveness
- document collections
- information retrieval
- vector space
- text retrieval
- query expansion
- tf idf
- statistical language models
- retrieval systems
- relevance feedback
- retrieval framework
- user queries
- vector space model
- inference network model
- sentence retrieval
- retrieval functions
- relevant documents
- retrieval process
- query terms
- pseudo relevance feedback
- evaluation measures
- digital libraries
- bayesian networks