Keyphrases
- document ranking
- mutual information
- information retrieval
- natural language
- document retrieval
- query expansion
- language model
- relevant documents
- question answering
- passage retrieval
- text retrieval
- document collections
- retrieved documents
- language modeling
- information extraction
- similarity measure
- retrieval effectiveness
- federated search
- image registration
- information retrieval systems
- test collection
- feature selection
- probabilistic retrieval models
- pseudo relevance feedback
- retrieval model
- search engine
- relevance model
- text mining
- machine learning
- relevance feedback
- n gram
- vector space model
- ranked list
- relevance assessments
- knowledge representation
- context dependent
- web documents
- ranking functions
- retrieval systems