Properties of Approzimation Operators of Logical AND Operation of Precision and Grade
Precision and grade are two important indexes for quantitative research. This paper is to research relationship and combination between precision and grade, and explore new extended rough set model. First it obtains relationship and transformation formulas between variable precision approximations and grade approximations. Then based on logical AND operation of precision and grade, rough set model of logical AND operation of precision and grade is proposed. In the new model, approximation operators of logical AND operation of precision and grade are studied, and their properties are obtained, such as the power action. The new rough set model has extended variable precision rough set model, graded rough set model and classical rough set model, and so these rough set models have obtained the corresponding power action of approximation operators.
artificial intelligence rough set theory logical operation precision variable precision rough set grade graded rough set evaluation function
Xianyong Zhang Zhiwen Mo Fang Xiong
College of Mathematics and Software Science Sichuan Normal University,SICNU Chengdu,Sichuan 610068,P Department of Information Engineering Sichuan Tianyi University Longquan,Sichuan 610100,P.R.China
国际会议
上海
英文
33-37
2009-11-20（万方平台首次上网日期，不代表论文的发表时间）