Keyphrases
- retrieval model
- term frequency
- text retrieval
- information retrieval
- query terms
- effective retrieval
- inverted file
- language model
- improvements in retrieval effectiveness
- information retrieval systems
- retrieval process
- retrieval effectiveness
- language modeling
- ir models
- document retrieval
- term weights
- test collection
- statistical language models
- query expansion
- vector space
- retrieval framework
- inference network model
- tf idf
- probabilistic retrieval models
- term dependence
- vector space model
- retrieval systems
- term dependencies
- term weighting
- language modeling framework
- trec collections
- relevance feedback
- user queries
- database
- retrieval functions
- text classification
- relevance model
- content based retrieval
- low dimensional
- document collections
- probabilistic model