基金Supported by the National Natural Science Foundation of China(61074050,61203034,50905172)the Youth Talent Fund of Anhui Education Department(2012SQRL086ZD)
基金Supported by National Natural Science Foundation of China(61174121, 61121003, 61203083) the Research Fund for the Doctoral Program of Higher Education of China Doctoral Foundation of University of Jinan (XBS1242)