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