作者机构:[1]Department of Mathematics, Southeast University, Nanjing 210096, China, [2]Department of Mathematics and Physics, Nanjing Institute of Technology Nanjing 211167, China, [3]Department of Mathematics, Brock University St. Catharines, L2S 3A1, Canada
相关基金:This research was supported in part by the National Natural Science Foundation of China (11371089, 11201064), the Specialized Research Fund for the Doctoral Program of Higher Education (20120092110020), the Natural Science Foundation of Jiangsu Province (BK20130599), and a Discovery Grant from the Natural Sciences and Engineering Research Council of Canada.