Spatial Pattern and Evolution of Urban System Based on Gravity Model and Whole Network Analysis in the Huaihe River Basin of China

Table 2

Statistical table of critical values of the HRB cities.

Year∖ critical value	1	2	3	4	5
2006	4147	2312	1576	1183	952
2010	4128	2283	1557	1171	946
2014	4160	2327	1574	1180	957
Ratio	15%	8.4%	5.7%	4.3%	3.5%