1. School of Information Technology, Guangdong Industry Polytechnic,Guangdong,China,510300
2. Hanyang University,Multidisciplinary Computational Laboratory,Department of Electrical and Biomedical Engineering,Seoul,Korea,04763
3. National Taipei University of Technology,Department of Mechanical Engineering,Taipei,Taiwan,10608
4. Michigan State University,Department of Electrical and Computer Engineering,East Lansing,Michigan,USA,48824