1. Xiamen University of Technology,School of Electrical Engineering and Automation,Xiamen,China
2. Lanzhou University of Technology,College of Electrical Engineering and Information Engineering,Lanzhou,China
3. Gansu Beacon Tower Data Information Technology Limited Liablity Company,Department of Technical Design,Lanzhou,China
4. Gansu Vocational and Technical College of Communications,Department of Information Engineering,Lanzhou,China