Keyphrases
- document retrieval
- news articles
- keyphrases
- document collections
- information retrieval
- language model
- online news
- text documents
- relevant documents
- text retrieval
- news stories
- cross language
- news sites
- retrieval model
- relevance feedback
- passage retrieval
- pseudo relevance feedback
- news events
- cross lingual
- query terms
- text classification
- document ranking
- learning algorithm