Research on the Relationship between Beijing-Tianjin-Hebei Airport Group and Regional Coordinated Development

Table 9

Weights of secondary indicators.

Secondary indicators	ej	dj
Daily average flight density (freight)	0.6202	0.3798	0.2962
Domestic and international navigation points (number)	0.6292	0.3708	0.2892
International passenger transfer rate (%)	0.4684	0.5316	0.4146
Total annual passenger throughput (10,000 passengers)	0.6193	0.3807	0.3772
Total annual cargo and mail throughput (10,000 tons)	0.6895	0.3105	0.3076
Annual total number of takeoffs and landings (ten thousand)	0.6817	0.3183	0.3152
The diversity of airport public transportation options (types)	0.8981	0.1019	0.9865
Distance from airport to city (km)	0.9986	0.0014	0.0135
Average delay time (min)	0.9992	0.0008	0.8889
Airport departure flight punctuality rate (%)	0.9999	0.0001	0.1111