摘要
模糊查询通常包含模糊单词和３种算子──语气算子、模糊化算子和判定化算子。通过模糊集合论，可表示这些模糊概念。在此基础上，介绍了一种扩展ＳＱＬ表达模糊查询，并将其转化为标准ＳＱＬ加以实现的方法。
Fuzzy querg usually includes fuzzy words and three kinds of modifiers:linguistic, fuzzy as well as deterministic modifier.All these can be described withfuzzy set theory.To this end,this paper presents an approach for representing fuzzyquery via Extended SQL(ESQL),which is then implemented by being transferredinto standard SQL.
出处
《武汉测绘科技大学学报》
CSCD
1996年第1期86-89,100,共5页
Geomatics and Information Science of Wuhan University
关键词
SQL语言
GIS
模糊查询
表达
扩展
fuzzy query
stsndard SQL
extended SQL
natural language interface
