Affiliation: | 1. School of Statistics and Management, Shanghai University of Finance and Economics, Shanghai 200433, P.R. China;2. Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, P.R. China;3. Department of Mathematics & Statistics, University of Calgary, Calgary, Alberta, Canada T2N 1N4;4. School of Statistics and Mathematics, Yunnan University of Finance and Economics, Kunming 650221, P.R. China |