Real-time Query Expansion in Relevance Models

Victor Lavrenko, James Allan

Research output: Working paper


Automatic query expansion is well known as a technique that improves query effectiveness on average. Unfortunately, it is usually very slow, increasing the time to process a query by 20 times or more. In this study, we use relevance models to show how the process can be made almost as fast as running a non-expanded query.
Original languageEnglish
Publication statusPublished - 2006


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