Keyphrases
- pseudo relevance feedback
- text classification
- term frequency
- query expansion
- document retrieval
- retrieval effectiveness
- language model
- text categorization
- bag of words
- relevance feedback
- text mining
- retrieved documents
- term selection
- feature selection
- relevant documents
- average precision
- language modeling
- relevance model
- labeled data
- machine learning
- n gram
- automatic query expansion
- information retrieval
- information retrieval systems
- knn
- text documents
- text data
- k nearest neighbor
- original query
- sentiment analysis
- pseudo feedback
- document representation
- query terms
- retrieval model
- unlabeled data
- digital libraries
- feature extraction
- decision trees