1. School of Management, Jiangsu University, Zhenjiang, Jiangsu, P.R. China
2. School of Architecture and Engineering, Tongling University, Tongling, Anhui, P.R. China
3. School of Mathematics and Statistics, Fuzhou University, Fuzhou, Fujian, P.R. China
4. School of Economics and Management, Chongqing Normal University, Chongqing, Chongqing, P.R. China
5. Zhejiang College, Shanghai University of Finance and Economics, Jinhua, Zhejiang, P.R. China
6. Decision Sciences Institute, Fuzhou University, Fuzhou, Fujian, P.R. China
7. Key Laboratory of Spatial Data Mining & Information Sharing of Ministry of Education, Fuzhou University, Fuzhou Fujian, P.R. China