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