Keyphrases
- language model
- language modeling
- n gram
- document retrieval
- probabilistic model
- speech recognition
- information retrieval
- retrieval model
- query expansion
- context sensitive
- language modelling
- test collection
- statistical language models
- language model for information retrieval
- ad hoc information retrieval
- smoothing methods
- vector space model
- document ranking
- machine learning
- query terms
- low dimensional