国家自然科学青年基金21506144;山西省青年自然科学基金2014021019-3;山西省高等学校科技创新项目2014115;the Youth National Natural Science Foundation of China21506144;the Natural Science Foundation for Young Scientists of Shanxi Province,China2014021019-3;the Science and Technology Innovation Project of Shanxi Higher Education Institutions,China2014115