1. Ministry of Education, Key Laboratory of Grain Information Processing and Control, Henan University of Technology, Zhengzhou, China
2. School of Computer and Communication Engineering, Zhengzhou University of Light Industry, Zhengzhou, China
3. School of Electrical and Information Engineering, Zhengzhou University, Zhengzhou, China
4. Department of Computer Science, The University of Alabama, Tuscaloosa, AL, USA
5. School of Computer Science and Engineering, South China University of Technology, Guangzhou, China