The National Grand Fundamental Research 973 Program of China under Grant No.2005CB321900;the National Science Foundation for Distinguished Young Scholars of China under Grant No.60725207;the International Joint Research Project of National Science Foundation under Grant No.60911130005;the Start-up Research Fund for Introduced Talents in Jinan University;the Start-up Research Fund for Introduced Talents in Beijing University of Technology;the Discipline and Graduate Education Development Project Fund of Beijing Education Committee;the Distinguished Young Reseacher Nurturing Program in Univeristies of Guangdong under Grant No.LYM08017~~