1. Key Laboratory of Instrumentation Science & Dynamic Measurement of Ministry of Education, North University of China, Taiyuan 030051, China
2. School of Information and Communication Engineering, North University of China, Taiyuan 030051, China
3. School of Software, North University of China, Taiyuan 030051, China
4. Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen, 361102, China