1. College of Mathematics and Physics, Beijing University of Chemical Technology, Beijing 100029, China
2. Beijing Key Laboratory of Environmentally Harmful Chemicals Analysis, Beijing University of Chemical Technology, Beijing 100029, China
3. School of Mathematical Science and Engineering, Anhui University of Technology, Anhui 243002, China
4. State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China
5. School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China