1. Key Laboratory of Instrumentation Science and Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, People’s Republic of China
2. School of Instrument and Electronics, North University of China, Taiyuan 030051, People’s Republic of China
3. School of Electronic and Information Engineering, Suzhou University of Science and Technology, Suzhou 215000, People’s Republic of China
4. College of Energy and Electric Engineering, Hohai University, Nanjing 210098, People’s Republic of China