1. Data Analysis Technology Lab., School of Mathematics and Statistics, Henan University, Kaifeng, People's Republic of China
2. Beijing Computation Science Research Center, Beijing, People's Republic of China
3. School of Mathematical Sciences, Peking University, Beijing, People's Republic of China
4. Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, People's Republic of China
5. College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, People's Republic of China