1. School of Government Audit, Nanjing Audit University, Nanjing 210000, China
2. College of Science, Nanjing Forestry University, Nanjing 210000, China
3. Department of Statistics, Computer Science and Mathematics, Public University of Navarre, Campus Arrosadia sn, 31006 Pamplona, Spain
4. Machine Intelligence Institute, Iona College, New Rochelle, NY 10801, USA
5. Faculty of Civil Engineering, Slovak University of Technology, Radlinského 11, Sk-810 05 Bratislava, Slovakia
6. Department of Algebra and Geometry, Faculty of Science, Palacky University in Olomouc, 17 Listopadu 12, Olomouc 77146, Czech Republic
7. Business School, Nanjing Normal University, Nanjing 210000, China