1. School of Education, Minzu University, Beijing 100081, China
2. School of Automation, China University of Geosciences, Wuhan 430074, China
3. Engineering Research Center of Ministry of Education for Intelligent Technology of Earth Exploration, Wuhan 430074, China
4. Hubei Key Laboratory of Advanced Control and Intelligent Automation for Complex Systems, Wuhan 430074, China
5. Department of Mechanical Engineering, Boston University, Boston, MA 02215, USA