Keyphrases
- language model
- language modeling
- probabilistic model
- retrieval model
- document retrieval
- n gram
- speech recognition
- query expansion
- statistical language models
- language modelling
- information retrieval
- smoothing methods
- context sensitive
- query terms
- test collection
- language models for information retrieval
- vector space model
- okapi bm
- document ranking
- passage retrieval
- language model for information retrieval
- relevance model
- pseudo relevance feedback
- retrieval effectiveness