1. Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources Guilin University of Technology, Guilin, China
2. Department of Electrical and Electronic Engineering, University of Manchester, Manchester, U.K.
3. Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources, Guilin University of Technology, Guilin, China
4. College of Electrical and Information Engineering, Hunan University, Changsha, China