1. College of Information and Communication, National University of Defense Technology, Wuhan 430000, China
2. College of Meteorology and Oceanography, National University of Defense Technology, Changsha 410073, China
3. Key Laboratory for Semi-Arid Climate Change of the Ministry of Education and College of Atmospheric Sciences, Lanzhou University, Lanzhou 730000, China
4. School of Computer Science, National University of Defense Technology, Changsha 410073, China