Research Article

A Study on the Small Organic Cities in China Combining PCA and CNN

Table 4

Urban organic composite index evaluation table.

TargetSystemIndicatorIndexWeight
Subsystem

A: the composite index for organic cities (100%)B1: urban growth boundary system (25%)C1: material boundary subsystem (15%)D1: geology and geography (5%)E1: ratio of the area which is not suitable for construction to the total urban area3.84
D2: natural ecology (5%)E2: ratio of the area of water to the total urban area3.87
E3: agrarian area3.66
D3: human intervention (5%)E4: number of urban parks3.80
E5: area of urban protection regions3.65
C2: space boundary subsystem (10%)D4: urban population (5%)E6: number of urban populations per unit of area of built-up regions3.78
D5: land use (5%)E7: area of built-up regions3.15
E8: area of urban construction land use per capita3.94
B2: urban scale system (25%)C3: population scale subsystem (15%)D6: population size (5%)E9: permanent residents3.87
E10: growth rate of urban population3.96
E11: growth rate of permanent residents migrating from other places2.88
D7: population structure (5%)E12: sex ratio of urban population2.89
E13: ratio of aged population2.72
D8: population density (5%)E14: urban population density2.90
C4: land use scale subsystem (10%)D9: development intensity (5%)E15: ratio of the area of built-up regions to the total urban area2.39
E16: average plot ratio of urban built-up regions2.47
D10: main functions (5%)E17: ratio of the area of public green regions to the total urban area3.55
E18: ratio of the area used for the industry to the total urban area3.40
E19: ratio of the area of residential regions to the total urban area3.69
B3: urban economic system (25%)D11: economic growth (5%)E20: GDP growth rate3.03
E21: GDP per capita2.68
D12: industrial structure (10%)E22: ratio of the primary industry to GDP2.47
E23: ratio of the secondary industry to GDP2.70
E24: ratio of the tertiary industry to GDP2.87
D13: production process (10%)E25: energy consumption per unit of GDP2.90
E26: water consumption per unit of GDP2.43
B4: urban environmental system (25%)D14: artificial environment (10%)E27: conditions of the urban lifeline system2.81
E28: ratio of green space in built-up regions3.91
E29: ratio of centralized processing for urban domestic sewage3.55
D15: natural environment (10%)E30: ratio of rehabilitation for degraded soil3.39
E31: ratio of recycled water usage3.89
E32: number of days per year when the air quality index is below 1002.97
D16: social environment (5%)E33: urban Engel’s coefficient2.63
E34: ratio of registered unemployed people2.61
E35: coefficient of variance of disposable income per capita between the urban and rural regions2.06

Source: the author.