国家自然科学基金41461109,41261104;西北师范大学青年教师科研能力提升计划项目NWNU-LKQN-12-18;国家社科基金青年项目12CTJ001.National Natural Science Foundation of China,No.41461109 and 41261104;Young Teachers Scientific Research Ability Promotion Fund of Northwest Normal University,No.NWNU-LKQN-12-18;National Social Science Foundation of China,No.12CTJ001.