1. Chongqing University, Department of Electrical Engineering Theory and New Technology, School of Electrical Engineering, Chongqing 400044, China.(corresponding author); .
2. Chongqing Triloop Prospecting Technology Co., Ltd., Chongqing 400044, China..
3. Colorado School of Mines, Golden, Colorado, USA..
4. University of Tulsa, Department of Electrical and Computer Engineering, Tulsa, Oklahoma 74104, USA..