1. School of Mathematics and Computer Science, Jianghan UniversityWuhan 430056People's Republic of China
2. Department of Electrical & Computer EngineeringRowan UniversityGlassboroNew Jersey 08028USA
3. Educational Administration OfficeJianghan UniversityWuhan 430056People's Republic of China
4. Graduate School, Jianghan UniversityWuhan 430056People's Republic of China