中国海洋生态效率时空分异及其与海洋产业结构响应关系识别
狄乾斌, 梁倩颖

Spatio-temporal Difference of Marine Eco-efficiency and Identification of Its Response Relationship with Marine Industrial Structure in China
Qianbin Di, Qianying Liang
图3 中国海洋生态效率重心移动距离及标准差椭圆长短轴变化
Fig.3 The distance of gravity centers transfer and changes of ellipse axis of marine eco-efficiency in China