1. Zhongnan University of Economic and Law,School of Information and Safety Engineering,Wuhan,China,430073
2. McMaster University,Department of Computing and Software,Hamilton,Canada,L8S 4L8
3. Tufts University,School of Engineering,Medford,MA,United States,02155
4. The Ohio State University,Department of Computer Science and Engineering,Columbus,USA,43212
5. University of California,Department of Mathematics,San Diego,USA,921222