1. School of Instrument Science and Opto-Electronics Engineering, Hefei University of Technology, Hefei, Anhui 230009, China
2. Anhui Province Key Laboratory of Measuring Theory and Precision Instrument, Hefei University of Technology, Hefei, Anhui 230009, China
3. School of Computer and Information Engineering, Fuyang Normal University, Fuyang 236037, China
4. College of Materials Science and Engineering, Hefei University of Technology, Hefei, Anhui 230009, China