Keyphrases
- retrieval model
- text retrieval
- information retrieval
- language modeling
- document retrieval
- language model
- statistical language models
- information retrieval systems
- vector space
- test collection
- retrieval framework
- retrieval effectiveness
- query expansion
- text mining
- vector space model
- effective retrieval
- retrieval systems
- user queries
- retrieval functions
- relevance feedback
- improvements in retrieval effectiveness
- tf idf
- retrieval process
- inference network model
- video retrieval
- relevant documents
- document collections
- keywords
- feature extraction
- search engine