国家自然科学基金61675165;陕西自然科学基金2016JM1011;西安理工大学特色项目批准号:2015TS012资助的课题.
Project supported by the National Natural Science Foundation of ChinaGrant 61675165;the Natural Science Foundation of Shaanxi Province, ChinaGrant 2016JM1011;the Characteristic Fund of Xi'an University of Technology, ChinaGrant 2015TS012