黄河流域绿色发展效率时空演进
周福礼, 海盼盼, 王雪妮

Green development efficiency measurement and the spatio- temporal evolution of Yellow River Basin based on a multi-period two-stage DEA model
Fuli Zhou, Panpan Hai, Xueni Wang
图1 多周期两阶段DEA模型的框架
Fig.1 Framework of multi-period two-stage DEA model