Keyphrases
- language model
- mixture model
- language modeling
- probabilistic model
- n gram
- document retrieval
- speech recognition
- information retrieval
- retrieval model
- test collection
- statistical language models
- query terms
- em algorithm
- relevance model
- smoothing methods
- language modelling
- maximum likelihood
- language model for information retrieval
- language models for information retrieval
- ad hoc information retrieval
- pseudo relevance feedback
- statistical model
- expectation maximization