supported by the MOE of Key Research Institute of Humanities and Social Sciences in Universities(Grants No.08JJD790145);the National Basic Research Program(973 Program)of China(2007CB814905)~~
Supported by NSFC(No.10901086,No.10871102);National Basic Research Program of China(973 Program,No.2007CB814905);the Research Fund for the Doctorial Program of Higher Education
supported by Anhui Province Youth Foundation(2009SQRZ166);National Natural Science Foundation of China(10971068);National Basic Research Program of China(973 Program)(2007CB814904);Program for New Century Excellent Talents in University(NCET-09-0356)
a grant from National Natural Science Foundation of China (10671072);Doctoral Program Foundation of the Ministry of Education of China (20060269016);the National Basic Research Program (973 Program,2007CB814904) of China;the NSF of Anhui Educational Bureau (KJ2008B243)