期刊名称：ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
印刷版ISSN：2194-9042
电子版ISSN：2194-9050
出版年度：1992
卷号：XXIX Part B3
页码：176-184
出版社：Copernicus Publications
摘要：Real world knowledge is usually vague and ambiguous and human beings generally think and communicate in fuzzy non-preciseterms. The fuzzy sets theory introduced by Zadeh in 1965 forms the mathematical and practical basis for the representation andmanipulation of such fuzzy information.Conventional databases, however, must contain precisely defined facts or data because database query languages such as the SQLimpose strict formats for data entry and query. Conventional query languages do not permit ambiguous or non-precise queries.This paper presents a new method for the representation of fuzzy numerical quantities in a way favorable to the storage and retrieval offuzzy values or vague expressions in a database
