ISSN 2196-5625 CN 32-1884/TK
1. School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China; 2. School of Electrical Engineering and Automation, Tianjin Polytechnic University, Tianjin 300387, China
National Natural Science Foundation of China (No. 51577124), the Key Technologies Research and Develop Program of Tianjin (No. 15ZCZDGX00980) and Tianjin Research Program of Application Foundation and Advanced Technology (No. 15JCZDJC32100)