黄河流域绿色发展水平时空演变特征
李光勤, 方徐兵

Spatio-temporal evolution characteristics of green development level in the Yellow River Basin
Guangqin Li, Xubing Fang
图1 2001—2018年黄河流域全局Malmquist-Luenberger指数演进趋势
Fig.1 Evolution trend of global Malmquist-Luenberger index in the Yellow River Basin from 2001 to 2018