中国电子科技2005，Vol.3Issue(3)：276-279,283,5.
Product Approximation of Grade and Precision
Product Approximation of Grade and Precision
摘要
Abstract
The normal graded approximation and variable precision approximation are defined in approximate space. The relationship between graded approximation and variable precision approximation is studied, and an important formula of conversion between them is achieved. The product approximation of gradeand precision is defined and its basic properties are studied.关键词
rough sets/approximation operators/operators of approximations/graded rough sets/variable precision rough setsKey words
rough sets/approximation operators/operators of approximations/graded rough sets/variable precision rough sets分类
管理科学引用本文复制引用
ZHANG Xian-yong,MO Zhi-wen..Product Approximation of Grade and Precision[J].中国电子科技,2005,3(3):276-279,283,5.基金项目
Supported by the National Natural Science Foundation of China (No. 69803007) （No. 69803007）
