Keyphrases
- language modeling
- language model
- information retrieval
- retrieval model
- query expansion
- n gram
- probabilistic model
- cross lingual
- text classification
- statistical language models
- test collection
- retrieval effectiveness
- relevance model
- database systems
- improvements in retrieval effectiveness
- sentence retrieval
- vector space model
- document retrieval
- document collections
- information retrieval systems