Keyphrases
- retrieval model
- vector space
- language model
- document retrieval
- language modeling
- test collection
- information retrieval systems
- retrieval effectiveness
- statistical language models
- information retrieval
- retrieval systems
- retrieval framework
- retrieval functions
- vector space model
- query expansion
- retrieval process
- user queries
- query terms
- tf idf
- sentence retrieval
- machine learning