国家自然科学基金项目41101119、国家重点研发计划项目2016YFC0503506、中国西南地缘环境与边疆发展协同创新中心开放课题资助.”National Natural Science Foundation of China 41101119,National Key Research and Development Program 2016YFC0503506,Open Project Funding of Collaborative Innovation Center for Geopolitical Environment of Southwest China and Borderland Development.”