Affiliation: | 1.School of Mathematics and Statistics, Beijing Institute of Technology, Beijing, 100081, China ;2.Department of Mathematics and Sciences, Hebei Institute of Architecture and Civil Engineering, Zhangjiakou, 075000, Hebei, China ;3.Beijing Key Laboratory on MCAACI, Beijing Institute of Technology, Beijing, 100081, China ;4.School of Aerospace Engineering, Beijing Institute of Technology, Beijing, 100081, China ; |