Keyphrases
- information retrieval
- information retrieval systems
- text mining
- test collection
- search engine
- document collections
- retrieval model
- learning to rank
- information filtering
- neural network
- databases
- co occurrence
- retrieval effectiveness
- relevant documents
- language modeling
- biological systems
- data sets
- ir evaluation
- document retrieval
- question answering
- query expansion
- information extraction
- genetic algorithm
- machine learning
- data mining