国家自然科学基金项目(30860248,71373058)%教育部人文社会科学研究专项(16JDSZ2031)%湛江市哲学社会科学规划(学科共建)项目(ZJ16GJ03)National Natural Science Foundation of China(30860248,71373058)%Humanities and Social Sciences Research Project of Ministry of Education of China(16JDSZ2031)%Zhanjiang Philosophy and Social Science Planning Project(Discipline construction)(ZJ16GJ03)