基金Supported by National Natural science Foundation-of P.R.Chlna (60474038, 60774022), Specialized Research Fund for the Doctoral Program of Higher Educatlon(20060004002)
基金Supported by the Scientific Research Foundation for the Returned 0verseas Chinese Scholars, State Education Ministry, and National Natural Science Foundation of China (60474005)
基金supported by National Natural Science Foundation of China(Nos.60834001,60974040,61120106009)the Fundamental Research Funds for the Central Universities(No.2011JBM201)