Document retrieval system using analog signal comparisons for retrieval conditions including relevant keywords
US5140692A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 6, 1990 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Jun 6, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99942
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A document retrieval system retrieves a registered document from a document database responsive to a designated retrieval condition including one or a plurality of designated keywords. The document retrieval system includes a storage for storing keyword relationships which indicate relationship values of keywords and relations of the keywords and registered documents, an input part for designating a retrieval condition including one or plurality of designated keywords, where the retrieval condition determines a registered document which is to be retrieved from the storage, a selector for selecting a plurality of keyword relationships based on the retrieval condition and for converting the selected keyword relationships into analog signals, an analog operation circuit for calculating a relevance of document based on the analog signals, and a converter for converting the calculated relevance of document into a digital value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.