1. School of information Science&Technology_Northwest University, Northwest University,China, China
2. School of Automation and Electrical Engineering_Shenyang Ligong University, Shenyang Ligong University,China, China
3. Colloege of information Science and Technology_Beijing University of Chemical Technology, Beijing University of Chemical Technology,China, China
4. School of Software_Taiyuan University of Technology, Taiyuan University of Technology,China, China