Keyphrases
- language model
- language modeling
- probabilistic model
- n gram
- document retrieval
- speech recognition
- information retrieval
- retrieval model
- document level
- test collection
- query expansion
- statistical language models
- ad hoc information retrieval
- language modelling
- language models for information retrieval
- vector space model
- document ranking
- context sensitive
- translation model
- language model for information retrieval
- smoothing methods
- pseudo relevance feedback
- chinese characters
- word segmentation
- query terms
- bayesian networks
- search engine