Keyphrases
- language model
- mental health
- language modeling
- n gram
- probabilistic model
- speech recognition
- information retrieval
- document retrieval
- retrieval model
- query expansion
- test collection
- language modelling
- vector space model
- statistical language models
- language models for information retrieval
- machine learning
- context sensitive
- ad hoc information retrieval
- language model for information retrieval
- pseudo relevance feedback
- search engine
- translation model
- document ranking
- relevance model
- okapi bm
- smoothing methods
- retrieval effectiveness
- natural language