Keyphrases
- language model
- language modeling
- watermarking scheme
- n gram
- document retrieval
- information retrieval
- probabilistic model
- query expansion
- speech recognition
- test collection
- retrieval model
- context sensitive
- language modelling
- ad hoc information retrieval
- statistical language models
- language model for information retrieval
- smoothing methods
- pseudo relevance feedback
- query terms
- query specific
- passage retrieval
- vector space model
- document level
- document ranking
- document length