Model 6

characteristic sequence

$X_0=\left(x_0\left(\text{1}\right),x_0\left(\text{2}\right),\cdots ,x_0\left(\text{8}\right)\right)$

the coordinated development degree

relevant factor sequence

$X_1=\left(x_1\left(\text{1}\right),x_1\left(\text{2}\right),\cdots ,x_1\left(\text{8}\right)\right)$

per capita industrial wastewater production

$X_2=\left(x_2\left(\text{1}\right),x_2\left(\text{2}\right),\cdots ,x_2\left(\text{8}\right)\right)$

per capita industrial waste gas production

$X_3=\left(x_3\left(\text{1}\right),x_3\left(\text{2}\right),\cdots ,x_3\left(\text{8}\right)\right)$

per capita industrial solid waste production

$X_4=\left(x_4\left(\text{1}\right),x_4\left(\text{2}\right),\cdots ,x_4\left(\text{8}\right)\right)$

surface water quality

$X_5=\left(x_5\left(\text{1}\right),x_5\left(\text{2}\right),\cdots ,x_5\left(\text{8}\right)\right)$

air quality index

$X_6=\left(x_6\left(\text{1}\right),x_6\left(\text{2}\right),\cdots ,x_6\left(\text{8}\right)\right)$

green coverage of constructed areas

$X_7=\left(x_7\left(\text{1}\right),x_7\left(\text{2}\right),\cdots ,x_7\left(\text{8}\right)\right)$

the proportion of energy conservation and environmental protection expenditure in local financial expenditure