Shaanxi Provincial Science and Technology Department of Basic Research Program2014JQ3113;Shaanxi Provincial Department of Education Science Research Project14JK1158;Shaanxi University of Technology Scientific Research Fund No.SLGKY15-41.陕西省科技厅自然科学基础研究计划2014JQ3113;陕西省教育厅自然科学研究项目14JK1158;陕西理工学院科研基金SLGKY15-41