黄河流域工业生态效率空间分异特征与影响因素

李贝歌, 胡志强, 苗长虹, 张佰发, 康巍

Spatio-temporal evolution characteristics and influencing factors of the industrial eco-efficiency in the Yellow River Basin

LI Beige, HU Zhiqiang, MIAO Changhong, ZHANG Baifa, KANG Wei

图3 趋势面分析

Fig. 3 Trend surface analysis