国家自然科学基金71172136;教育部人文社会科学研究基金14YJC790020;中国博士后科学基金2014M560199;东北财经大学2016年度校级青年培育项目DUFE2016Q01Funded ProjectSupported by the National Natural Science Foundation of China71172136;the Humanity and Social Sciences Research of Min-istry of Education14YJC790020;China Postdoctoral Science Foundation2014M560199;the Youth Foundation of Dongbei University of Fi-nance and EconomicsDUFE2016Q01