1. School of Mathematics and Physics and the Hebei Key Laboratory of Optoelectronic Information and Geo-Detection Technology, Hebei GEO University, Shijiazhuang, China
2. School of Mathematics and Physics, University of Science and Technology, Beijing, China
3. International School for Optoelectronic Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
4. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing, China