基金Supported by the National Natural Science Foundation of China(61373174)Supported by the Education Committee Research Foundation of Chongqing(KJ131314)Emphasis Research Project of Yangtze Normal University(2013XJZD006)
基金supported by the Cultivation Fund of the Key Scientific and Technical InnovationProject,Ministry of Education of China(NO708040)National Natural Science Foundation of China underProject 10601030Leading Academic Discipline Program,the 10th five year plan of 211 Project for Shanghai University of Finance and Economics.