国家自然科学基金面上项目81371221;重庆市基础与前沿研究计划项目CSTC2016jcyjA0069;重庆市教委科学技术研究项目KJ130317;重庆市渝中区科技项目20130132.Supported by the General Program of National Natural Science Foundation of China81371221;the Project of Basic and Frontier Research of ChongqingCSTC2016jcyjA0069;the Project of Scientific and Technological Research of Chongqing Municipal Education CommissionKJ130317;the Science and Technology Project of Yuzhong District,Chongqing20130132