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Zoekopdracht: faculteit: "FNWI" en publicatiejaar: "2005"

AuteursJ. Kamps, G.A. Mishne, M. de Rijke
TitelLanguage Models for Searching in Web Corpora
Boek/bron titelThe Thirteenth Text Retrieval Conference (TREC 2004)
Auteurs/EditorsE.M. Voorhees, L.P. Buckland
FaculteitFaculteit der Natuurwetenschappen, Wiskunde en Informatica
Faculteit der Geesteswetenschappen
Instituut/afd.FNWI: Institute for Logic, Language and Computation (ILLC)
FNWI: Informatics Institute (II)
TrefwoordenInformation retrieval
Basisclassificatie54.69 computer science: information systems: other
SamenvattingWe describe our participation in the TREC 2004 Web and Terabyte tracks. For the web track, we employ mixture language models based on document full-text, incoming anchortext, and documents titles, with a range of webcentric priors. We provide a detailed analysis of the effect on relevance of document length, URL structure, and link topology. The resulting web-centric priors are applied to three types of topics?distillation, home page, and named page?and improve effectiveness for all topic types, as well as for the mixed query set. For the terabyte track, we experimented with building an index just based on the document titles, or on the incoming anchor texts. Very selective indexing leads to a compact index that is effective in terms of early precision, catering for the typical web searcher behavior.
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