Copyright 1995 INIST-CNRS CC BY 4.0 Sauf mention contraire ci-dessus, le contenu de cette notice bibliographique peut être utilisé dans le cadre d’une licence CC BY 4.0 Inist-CNRS / Unless otherwise stated above, the content of this bibliographic record may be used under a CC BY 4.0 licence by Inist-CNRS / A menos que se haya señalado antes, el contenido de este registro bibliográfico puede ser utilizado al amparo de una licencia CC BY 4.0 Inist-CNRS
Notes:
Sciences of information and communication. Documentation
FRANCIS
Accession Number:
edscal.3462434
Database:
PASCAL Archive
Weitere Informationen
A new retrieval method together with a new access structure is presented that is aimed at a high update efficiency and a high retrieval effectiveness. The access structure consists of signature and non -inverted descriptions. This access structure can be updated efficiently because the description of a single document is stored in a compact form. The signatures are used to compute approximate retrieval values first, and the non-inverted descriptions are then used to determine the final list of documents ranked by the exact retrieval status values. Our basic approach based on the standard tf*idf weighting scheme has been improved in in both retrieval effectiveness and retrieval efficiency. On an average, the time for retrieving the top ranked document is clearly below two second while the document collection can be updated in 10 msec. (inserting, deleting, or modifying a document description.