基金Supported by the National Natural Science Foundation of China under Grant(11371075)the research innovation program of Hunan province of China for postgraduate students under Grant(CX2015B374)
基金Supported by the National Natural Science Foundation of China under Grant No.10771022Supported by FEDER Funds through"Programa Operacional Factores de Competitividade-COMPETE"+2 种基金Supported by Portuguese Funds through"Fundao para a Ciência e aTecnologia"within the Project PEst-C/MAT/UI0013/2011 and PTDC/MAT/112273/2009Portugal