University of Sistan and Baluchestan Iranian Journal of Fuzzy Systems 1735-0654 17 1 2020 02 01 cover Vol.17- No.1 February 2020 0 5107 10.22111/ijfs.2020.5107 EN Journal Article 2020 01 18 https://ijfs.usb.ac.ir/article_5107_7da4c58d8d6acdb1d961ccff54eaf3af.pdf