Keyphrases
- feature selection
- information retrieval
- text categorization
- text classification
- multi class
- query expansion
- content based retrieval
- feature extraction
- image retrieval
- feature space
- relevance feedback
- feature ranking
- efficient retrieval
- query formulation
- feature subset
- document retrieval
- information retrieval systems
- feature set
- test collection
- support vector
- microarray data
- information gain
- mutual information
- feature selection algorithms
- average precision
- structured documents
- dimensionality reduction
- feature weighting
- classification accuracy