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ROUGH SET OVER DUAL-UNIVERSES IN FUZZY APPROXIMATION SPACE | ||
| Iranian Journal of Fuzzy Systems | ||
| مقاله 6، دوره 9، شماره 3، شهریور 2012، صفحه 79-91 اصل مقاله (381 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22111/ijfs.2012.148 | ||
| نویسندگان | ||
| Ruixia Yan* 1؛ Jianguo Zheng2؛ Jinliang Liu3؛ Chaoyong Qin4 | ||
| 1School of Management, Shanghai University of Engineering Science, Shanghai 201620, P. R. China and Glorious Sun School of Business Administration, Donghua Universty, Shanghai 200051, P. R.China | ||
| 2Glorious Sun School of Business Administration, Donghua Univer- sity, Shanghai 200051, P. R.China | ||
| 3Department of Applied Mathematics, Nanjing University of Finance and Economics, Nanjing, 210046, P.R.China | ||
| 4College of Mathematics and Information Sciences of Guangxi Univer- sity, Naning 530004, P. R. China and Glorious Sun School of Business Administration, Donghua Universty, Shanghai 200051, P. R.China | ||
| چکیده | ||
| To tackle the problem with inexact, uncertainty and vague knowl- edge, constructive method is utilized to formulate lower and upper approx- imation sets. Rough set model over dual-universes in fuzzy approximation space is constructed. In this paper, we introduce the concept of rough set over dual-universes in fuzzy approximation space by means of cut set. Then, we discuss properties of rough set over dual-universes in fuzzy approximation space from two viewpoints: approximation operators and cut set of fuzzy set. Reduction of attributes and rules extraction of rough set over dual-universes in fuzzy approximation space are presented. Finally, an example of disease diagnoses expert system illustrates the possibility and eciency of rough set over dual-universes in fuzzy approximation space. | ||
| مراجع | ||
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