秦岭—淮河南北供暖格局变化及其影响因素
李双双,延军平,武亚群,汪成博

Spatiotemporal variability of actual heating energy efficiency and its influencing factors in areas south and north of Qinling-Huaihe Line
LI Shuangshuang,YAN Junping,WU Yaqun,WANG Chengbo
图3 1960-2016年秦岭—淮河南北实际供暖能耗指数变化特征
Fig. 3 Variation of actual heating energy consumption in areas south and north of Qinling-Huaihe Line in 1960-2016