By Bruce Croft, Donald Metzler, Trevor Strohman
ISBN-10: 0136072240
ISBN-13: 9780136072249
Se's: info Retrieval in perform is perfect for introductory details retrieval classes on the undergraduate and graduate point in machine technology, details technological know-how and desktop engineering departments. it's also a invaluable device for seek engine and data retrieval professionals.
Written via a pace-setter within the box of data retrieval, se's: info Retrieval in perform, is designed to offer undergraduate scholars the certainty and instruments they should overview, evaluate and adjust se's. insurance of the underlying IR and mathematical versions toughen key suggestions. The book’s various programming routines make huge use of Galago, a Java-based open resource seek engine.
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Additional info for Search Engines: Information Retrieval in Practice
Example text
2. The query process suits shown to the user. This includes, for example, generating the snippets used to summarize documents. The document data store is one of the sources of information used in generating the results. Finally, this component also provides a range of techniques for refining the query so that it better represents the information need. The ranking component is the core of the search engine. It takes the transformed query from the user interaction component and generates a ranked list of documents using scores based on a retrieval model.
Run these queries on two commercial web search engines and compare the top 10 results for each query by doing relevance judgments. Write a report that answers at least the following questions: What is the precision of the results? What is the overlap between the results for the two search engines? Is one search engine clearly better than the other? If so, by how much? How do short queries perform compared to long queries? 2. Site search is another common application of search engines. In this case, search is restricted to the web pages at a given website.
This is a critical part of improving a search engine and selecting values for parameters that are appropriate for the application. A variety of evaluation measures are commonly used, and these should also be selected to measure outcomes that make sense for the application. Measures that emphasize the quality of the top-ranked documents, rather than the whole list, for example, are appropriate for many types of web queries. Performance analysis The performance analysis component involves monitoring and improving overall system performance, in the same way that the ranking analysis component monitors effectiveness.
Search Engines: Information Retrieval in Practice by Bruce Croft, Donald Metzler, Trevor Strohman
by Anthony
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