Keyphrases
- missing values
- data imputation
- missing data
- query processing
- incomplete data
- missing data imputation
- response time
- database
- data structure
- query evaluation
- user queries
- incomplete data sets
- query expansion
- keywords
- data sources
- noisy data
- missing information
- data matrix
- high dimensional data
- feature values
- data analysis
- relevance feedback
- artificial neural networks
- imputation methods
- multiple imputation
- information retrieval