1. School of Information and Communications Engineering, Xi’an Jiaotong University, Xi’an, China
2. School of Software Engineering, Xi’an Jiaotong University, Xi’an, China
3. School of Mathematics and Statistics, Xi’an Jiaotong University, Xi’an, China
4. Geophysics Key Laboratory, Technology Research and Development Center, Research Institute of China National Offshore Oil Corporation (CNOOC), Beijing, China