说明：  案例分析 全国研究生数学建模竞赛由教育部学位与研究生教育发展中心（以下简称学位中心）主办，是学位中心主办的“全国研究生创新实践系列活动”主题赛事之一。
(matble The National Graduate Mathematical Contest is sponsored by the Ministry of Education Degree and Graduate Education Development Center (hereinafter referred to as the Degree Center) and is one of the thematic events of the "National Graduate Successful Practice Series" organized by the degree center.)