Affiliation: | 1. College of Mathematics and Physics, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, People''s Republic of China;2. College of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, Jiangsu, People''s Republic of China;3. College of Science, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, People''s Republic of China |