Energy Efficiency Based Regional Cluster Analysis of China
针对传统按地理划分区域缺乏针对性的问题，基于能源效率对中国30个地区重新聚类，发现分为6个特征显著的组，且组内能源强度收敛性更强，变异系数呈倒U形。
The conventional region classification mainly based on geographical location,which is lack of pertinence of the problems to be solved.Target on energy efficiency issues of China,this paper re-clustered 30 regions and examined the energy intensity convergence of each group by coefficient of variation.The study shows that: the clustering results of energy efficiency indicate that the 30 regions of China are divided into six clusters and each has its own significant characteristics;the energy intensity convergence of intra-group was stronger compared with traditional grouping;the curve of coefficient of variation was like to the shape of Inverse-U,which indicated that after the difference of the intra-group energy efficiency had reached a peak,the energy intensity will get into stable convergence.