1. Metrology Center, Yunnan Power Grid Co., Ltd., Kunming 650500, China
2. Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, China
3. Faculty of Civil Aviation and Aeronautics, Kunming University of Science and Technology, Kunming 650500, China
4. Marketing Department, Lijiang Power Supply Bureau, Ltd., Yunnan Power Grid Co., Kunming 650500, China
5. Longshine Technology Group Co., Ltd., Wuxi 214000, China