Keyphrases
- language model
- language modeling
- n gram
- information retrieval
- speech recognition
- document level
- probabilistic model
- query expansion
- document retrieval
- retrieval model
- language modelling
- language models for information retrieval
- statistical language models
- test collection
- context sensitive
- vector space model
- query terms
- ad hoc information retrieval
- document ranking
- language model for information retrieval
- smoothing methods
- pseudo relevance feedback
- query specific
- relevance assessments
- okapi bm
- text retrieval
- language modeling approaches
- feature selection