1. Anhui University of Science and Technology,School of Geomatics,Huainan,China
2. Anhui University of Science and Technology,School of Electrical and Information Engineering,Huainan,China
3. West Anhui University,School of Electrical and Optoelectronic Engineering,Lu’an,China
4. Anhui Nanrui Jiyuan Power Grid Technology Co., Ltd.,Heifei,China