Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Automatisk tesauruskonstruktion med latent semantisk indexering
University of Borås, Swedish School of Library and Information Science.
University of Borås, Swedish School of Library and Information Science.
2006 (Swedish)Independent thesis Advanced level (degree of Master (One Year))Student thesisAlternative title
Automatic thesaurus construction with latent semantic indexing (English)
Abstract [en]

The aim of this thesis is to examine how thesauri constructed with latent semantic indexing LSI are performing when used for query expansion. There is a well-known problem with synonymy in information retrieval and one solution to this problem is to use a thesaurus. In this thesis thesauri are created automatically to find statistically related words and not only synonyms. LSI is a method that uses singular value decomposition SVD to reduce dimensions in a matrix and find latent relationships between words. We constructed nine thesauri and used them for query expansion in a Swedish database, GP_HDINF. To evaluate the performance of the thesauri precision and recall were used. We found some interesting results in how the thesauri performed, even though the results from this study did not show improvements of the retrieval effectiveness when using the thesauri for query expansion. In this study it is interesting to notice that when the recall for a topic improved precision also improved or was unchanged.

Place, publisher, year, edition, pages
University College of Borås. Swedish School of Library and Information Science (SSLIS) , 2006.
Series
Magisteruppsats i biblioteks- och informationsvetenskap vid Bibliotekshögskolan/Biblioteks- och informationsvetenskap, ISSN 1404-0891 ; 2006:40
Keywords [en]
library and information science
Keywords [sv]
biblioteks- och informationsvetenskap
National Category
Social Sciences
Identifiers
URN: urn:nbn:se:hb:diva-18226Local ID: 2320/1455OAI: oai:DiVA.org:hb-18226DiVA, id: diva2:1310141
Note
Uppsatsnivå: DAvailable from: 2019-04-30 Created: 2019-04-30

Open Access in DiVA

fulltext(397 kB)20 downloads
File information
File name FULLTEXT01.pdfFile size 397 kBChecksum SHA-512
a804ecb7051d37aa89edc8acbf45e073c8ede43143ff0a856090f905c438cebe3d7b5e9f823a43f6906711fffe9af43afda7a29e84bb435a843cc18b0dcda69f
Type fulltextMimetype application/pdf

By organisation
Swedish School of Library and Information Science
Social Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 20 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 7 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf