Keyphrases
- information retrieval
- asia pacific
- north america
- henan province
- query expansion
- knowledge based systems
- information extraction
- case study
- software engineering
- economic growth
- developed countries
- document collections
- test collection
- management system
- learning to rank
- document retrieval
- machine learning
- artificial intelligence
- sustainable development
- search engine
- digital government
- development process
- retrieval systems
- information processing
- information systems
- information retrieval systems
- relevance feedback