Supported by NSF(No.11101288);NSF of Zhejing province(No.Y6110323);Jiangsu planned projects for postdoctoral Research Funds(No.0902081C);Project of Shaoxing University(No.09LG1001)
Supported by the Specialized Research Fund for the Doctoral Program of Higher Education (20060286006);the FNS of CHINA(10571026);the Southeast University Fund(XJ0707273)