基金Research partially supported by the Education Department Foundation of Hunan Province(No.04C328)and the NSF of Zhejiang Province(No.M103104) Research partially supported by the NSF of Zhejiang Province(No.Y604569)and the STF of Education Department of China(No.204063).
基金Supported by the NNSF of China (10671115)Grants from Specialized Research Fund for the Doctoral Program of Higher Education(20060560002)NSF of Guangdong Province( 06105648)