Logical OR Model of Variable Precision Upper Approximation Operator and Grade Lower Approximation Operator

摘要：

Precision and grade are two important quantitative indexes. This paper is to combine precision and grade, and explore new extended rough set model. Based on logical OR requirement of precision and grade, this paper proposes logical OR model of variable precision upper approximation operator and grade lower approximation operator. In the new model, basic structure and properties are obtained by transformation formulas between variable precision approximations and grade approximations, furthermore regular algorithm and structural algorithm are proposed and analyzed. Finally a practical example is given to illustrate the model and the algorithms. The new model has extended variable precision rough set model, graded rough set model and classical rough set model, and so these models have obtained corresponding properties of approximation operators.

关键词： artificial intelligence rough set theory logical operation approximation operator variable precision rough set graded rough set precision grade structural algorithm

作者: Xianyong Zhang

作者单位: College of Mathematics and Software Science Sichuan Normal University SICNU Chengdu Sichuan 610068 P.R.China

会议类型: 国际会议

会议名称: The 2nd IEEE International Conference on Advanced Computer Control(第二届先进计算机控制国际会议 ICACC 2010)

会议地点: 沈阳

会议语种:英文

页码: 363-367

在线出版日期: 2010-03-27（万方平台首次上网日期，不代表论文的发表时间）