1. Chongqing University,The School of Electrical Engineering and State Key Laboratory of Power Transmission Equipment & System Security and New Technology,Chongqing,China
2. Chongqing University,The College of Optoelectronic Engineering and Key Laboratory of Optoelectronic Technology & Systems Education Ministry,Chongqing,China
3. Shenyang Ligong University,School of Automation and Electrical Engineering,Shenyang,China