略

指标的归一化处理: xij′=xij−min(x1j,⋯ ,xnj)max(x1j,⋯ ,xnj)−min(x1j,⋯ ,xnj)x’_{ij}=\frac{x_{ij}-min(x_{1j},\cdots,x_{nj})}{max(x_{1j},\cdots,x_{nj})-min(x_{1j},\cdots,x_{nj})}xij′​=max(x1j​,⋯,xnj​)−min(x1j​,⋯,xnj​)xij​−min(x1j​,⋯,xnj​)​ 第j项指标下第i个国家占该指标的比重: pij=xij∑i=1nxijp_{ij}=\frac{x_{ij}}{\sum_{i=1}^nx_{ij