Keyphrases
- language model
- information retrieval
- pre trained
- language modeling
- n gram
- language modelling
- probabilistic model
- speech recognition
- query expansion
- statistical language models
- document retrieval
- smoothing methods
- retrieval model
- text retrieval
- test collection
- document ranking
- improve retrieval effectiveness
- data sets
- text mining
- principal component analysis
- keywords
- okapi bm
- pseudo relevance feedback
- multiword
- training data