1. School of Electrical and Information Engineering; Jiangsu University; Zhenjiang 212013 China
2. Key Laboratory of Facility Agriculture Measurement and Control Technology and Equipment of Machinery Industry; Jiangsu University; Zhenjiang 212013 China
3. School of Food and Biological Engineering; Jiangsu University; Zhenjiang 212013 China
4. Department of Information Engineering; ChuZhou Vocational Technology College; Chuzhou 239000 China