Research on the City Network Structure in the Yellow River Basin in China Based on Two-Way Time Distance Gravity Model and Social Network Analysis Method

Table 4

Average value of city network indexes and city development indexes of the Yellow River basin and its subregions.

Subregion	Network density (%)	Out- degree centrality (%)	In- degree centrality (%)	Out-closeness centrality (%)	In-closeness centrality (%)	Betweenness centrality (%)	2019 urbanization rate (%)	2019 average GDP (100 million yuan RMB)
Overall Yellow River basin	13.2	20.8	31.3	36.7	37.6	9.78	56.78	2262.27
Zhengzhou urban agglomeration	55.5	33.9	47.3	64.7	70.7	9.79	50.73	3904.85
Shandong Peninsula urban agglomeration	52.5	22.2	50.6	63.0	68.1	9.08	60.99	4102.32
Taiyuan urban agglomeration	50.0	33.0	55.0	60.8	65.0	12.63	57.79	2755.56
Gansu-Shaanxi urban agglomeration	26.5	19.8	79.1	27.9	39.1	29.28	47.35	1301.30
Inner Mongolia-Ningxia urban agglomeration	43.6	29.0	18.0	54.9	56.2	11.75	44.10	1990.63