An information retrieval process begins when a user enters a query into the system. Queries are formal statements of information needs, for example search strings in web search engines. In information retrieval, a … 展开

Areas where information retrieval techniques are employed include (the entries are in alphabetical order within each category): 展开

The evaluation of an information retrieval system' is the process of assessing how well a system meets the information needs of its users. In general, measurement considers a collection of … 展开

• Before the 1900s
• 1920s-1930s
• 1940s–1950s
• 1960s:
• 1970s
• 1980s 展开

there is ... a machine called the Univac ... whereby letters and figures are coded as a pattern of magnetic spots on a long steel tape. By this means the text of a document, preceded by its … 展开

In order to effectively retrieve relevant documents by IR strategies, the documents are typically transformed into a suitable representation. Each retrieval strategy incorporates a specific model for its document representation purposes. The picture on the right … 展开

• SIGIR: Conference on Research and Development in Information Retrieval
• ECIR: European Conference on Information Retrieval
• CIKM: Conference on Information and Knowledge Management 展开