1. Department of Computer Science, The University of Alabama, Tuscaloosa, AL, USA
2. Department of Biology, Chemistry, Mathematics and Computer Science, University of Montevallo, Montevallo, AL, USA
3. Department of Computer Science, California State University, Fullerton, CA, USA
4. School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu, China
5. School of Electrical and Automation Engineering, Hefei University of Technology, Hefei, China