1. School of Automation, China University of Geosciences, Wuhan, People's Republic of China
2. Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems, Wuhan, People's Republic of China
3. Engineering Research Center of Intelligent Technology for Geo-Exploration, Ministry of Education, Wuhan, People's Republic of China
4. School of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou, People's Republic of China