Keyphrases
- language model
- event extraction
- language modeling
- n gram
- information retrieval
- probabilistic model
- document retrieval
- retrieval model
- information fusion
- knowledge discovery
- query expansion
- test collection
- query terms
- cross lingual
- vector space model
- online news
- language models for information retrieval
- smoothing methods
- open domain
- pseudo relevance feedback
- text mining
- image retrieval