Keyphrases
- language model
- information retrieval
- language modeling
- social media
- document retrieval
- retrieval model
- query expansion
- test collection
- n gram
- speech recognition
- probabilistic model
- vector space model
- document length
- language modelling
- ad hoc information retrieval
- statistical language models
- document ranking
- context sensitive
- information retrieval systems
- retrieval effectiveness
- document collections
- passage retrieval
- query terms
- okapi bm
- relevant documents
- language modeling framework
- search engine
- ir models
- smoothing methods
- language models for information retrieval
- expert finding
- term weighting
- latent semantic indexing
- pseudo relevance feedback
- cross lingual
- video content
- key frames
- question answering
- text classification
- natural language processing