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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

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Spelling suggestions: "subject:"testkollektionen"" "subject:"textkollektionen""

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En komparativ studie av fem rankningsalgoritmer för query expansion / A comparative study of five ranking algorithms for query expansion

Eklund, Johan, Stenström, Anders January 2002 (has links)
The purpose of this thesis is to compare five different ranking algorithms for query expansion. The algorithms compared are f4, f4mod, porter, wpq, and emim. This is done using a TREC collection, a selection of topics, and relevance judgements. Relative recall is measured before and after the expansion of the query. The study shows that all of the algorithms manage to increase the relative recall, f4 being the one most successful. / Uppsatsnivå: D
query expansion
ir-system
återvinningseffektivitet
rankningsalgoritmer
testkollektioner
Social Sciences
Samhällsvetenskap

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