Keyphrases
- term dependencies
- language model
- language modeling
- n gram
- document retrieval
- probabilistic model
- language modelling
- retrieval model
- query expansion
- information retrieval
- relevance model
- test collection
- query terms
- mixture model
- retrieval effectiveness
- pseudo relevance feedback
- ad hoc information retrieval
- vector space model
- natural language
- translation model
- image features