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

Table 7

The calculation process of the coordination degree between the airport group subsystem i and the area subsystem j.

Year	i state coordination value required for j	j state coordination value required for i	U(i/j)	U(j/i)	C (i, j)
2009	−1.2097	−1.8233	1.0854	1.066	0.9821
2010	−0.7997	−1.1619	1.0669	1.0508	0.9849
2011	−0.5946	−0.5967	1.0276	1.0247	0.9972
2012	−0.2949	−0.26	1.0148	1.0188	0.9961
2013	−0.0820	−0.1156	1.0000	1.0018	0.9982
2014	0.0600	0.1609	1.0085	1.0174	0.9913
2015	0.2099	0.2572	1.0000	1.0036	0.9964
2016	0.5017	0.5697	1.0037	1.0008	0.9971
2017	0.9906	1.1469	1.0111	1.0200	0.9912
2018	1.2588	1.1590	1.0855	1.0746	0.9899