Digitala Vetenskapliga Arkivet

Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Automatisk tesauruskonstruktion med latent semantisk indexering
Högskolan i Borås, Institutionen Biblioteks- och informationsvetenskap / Bibliotekshögskolan.
Högskolan i Borås, Institutionen Biblioteks- och informationsvetenskap / Bibliotekshögskolan.
2006 (svensk)Independent thesis Advanced level (degree of Master (One Year))OppgaveAlternativ tittel
Automatic thesaurus construction with latent semantic indexing (engelsk)
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.

sted, utgiver, år, opplag, sider
University College of Borås. Swedish School of Library and Information Science (SSLIS) , 2006.
Serie
Magisteruppsats i biblioteks- och informationsvetenskap vid Bibliotekshögskolan/Biblioteks- och informationsvetenskap, ISSN 1404-0891 ; 2006:40
Emneord [en]
library and information science
Emneord [sv]
biblioteks- och informationsvetenskap
HSV kategori
Identifikatorer
URN: urn:nbn:se:hb:diva-18226Lokal ID: 2320/1455OAI: oai:DiVA.org:hb-18226DiVA, id: diva2:1310141
Merknad
Uppsatsnivå: DTilgjengelig fra: 2019-04-30 Laget: 2019-04-30

Open Access i DiVA

fulltekst(397 kB)164 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 397 kBChecksum SHA-512
a804ecb7051d37aa89edc8acbf45e073c8ede43143ff0a856090f905c438cebe3d7b5e9f823a43f6906711fffe9af43afda7a29e84bb435a843cc18b0dcda69f
Type fulltextMimetype application/pdf

Av organisasjonen

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 164 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

urn-nbn

Altmetric

urn-nbn
Totalt: 78 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf