Show simple item record

dc.contributor.authorΝίτσος, Ηλίαςel_GR
dc.contributor.authorΔέρβος, Δημήτρηςel_GR
dc.contributor.authorΕυαγγελίδης, Γεώργιοςel_GR
dc.contributor.authorDervos, Dimitrisen
dc.contributor.authorEvangelidis, Georgiosen
dc.contributor.authorNitsos, Iliasen
dc.descriptionΠεριέχει το πλήρες κείμενοel_GR
dc.description.abstractThe inverted file is a popular and efficient method for indexing text databases and is being used widely in information retrieval applications. As a result, the research literature is rich in models (global and local) that describe and compress inverted file indexes. Global models compress the entire inverted file index using the same method and can be distinguished in parameterized and non-parameterized ones. The latter utilize fixed codes and are applicable to dynamic collections of documents. Local models are always parameterized in the sense that the method they use makes assumptions about the distribution of each and every word in the document collection of the text database. In the present study, we examine some of the most significant integer compression codes and propose g-binary, a new non-parameterized coding scheme that combines the Golomb codes and the binary representation of integers. The proposed new coding scheme does not introduce any extra computational overhead when compared to the existing non-parameterized codes. With regard to storage utilization efficiency, experimental runs conducted on a number of TREC text database collections reveal an improvement of about 6% over, the existing non-parameterized codes. This is an improvement that can make a difference for very large text database collections.en
dc.sourceLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) Volume 2736, 2003, Pages 464-473en
dc.titleg-binary: a new non-parameterized code for improved inverted file compressionen
dc.subject.JITAΤεχνολογίες πληροφόρησης και τεχνολογίες βιβλιοθηκώνel_GR
dc.subject.JITAInformation technology and library technologyen

Files in this item


There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record