Sökning: "Information retrieval IR"

Visar resultat 21 - 22 av 22 uppsatser innehållade orden Information retrieval IR.

1. 21. Automatisk query expansion : en komparativ studie av olika strategier för termklustring baserade på lokal analys

   Magister-uppsats, Högskolan i Borås/Institutionen Biblioteks- och informationsvetenskap / Bibliotekshögskolan

   Författare :Sofia Lundmark; [2004]
   Nyckelord :library and information science; biblioteks- och informationsvetenskap;

   Sammanfattning : Automatic query expansion has long been studied in information retrieval research as a technique that deals with the fundamental issue of word mismatch between query and document. The purpose of this thesis is to compare the retrieval effectiveness of different strategies for automatic query expansion. LÄS MER

3. 22. Passage Retrieval : en litteraturstudie av ett forskningsområde inom information retrieval

   Magister-uppsats, Högskolan i Borås/Institutionen Biblioteks- och informationsvetenskap / Bibliotekshögskolan

   Författare :Mattias Åkesson; [2000]
   Nyckelord :information retrieval; passage retrieval; fulltextåtervinning; textstruktur; återvinningseffektivitet;

   Sammanfattning : The aim of this thesis is to describe passage retrieval (PR), with basis in results from various empirical experiments, and to critically investigate different approaches in PR. The main questions to be answered in the thesis are: (1) What characterizes PR? (2) What approaches have been proposed? (3) How well do the approaches work in experimental information retrieval (IR)? PR is a research topic in information retrieval, which instead of retrieving the fulltext of documents, that can lead to information overload for the user, tries to retrieve the most relevant passages in the documents. LÄS MER