About author:REN Bi-jun(1959-), male, native of Jiaozuo, Henan, an associate professor of Henan College of Finance and Taxation, engages in the grey system theory and its application; FU Yan-ling(1978-), female, native of Puyang, Henan, a lecturer of Henan College of Finance and Taxation, M.S.D., engages in the rough set theory and its application.
Supported by:
Supported by Soft Science Research Project of Henan Province(122400450212)； Supported by Foundation Lead-edge Technologies Research Project of Henan Province(122300410061)
