Connection Characteristics and Hierarchical Structure of China’s Urban Network-Based on the Communications Technology Service Industry

Table 1

Overview of network characteristics.

Index	R & D network	Sales network	Investment network	Comprehensive network
Network density	0.2362	0.0711	0.0455	0.0474
Mean degree centrality	8.974	7.82	4.917	7.669
Mean betweenness centrality	13.641	65.865	82.679	114.869
Mean closeness centrality	19.603	46.486	40.486	43.93
Degree of centralization	0.4723	0.5664	0.4441	0.56
Betweenness centrality	0.1489	0.5345	0.349	0.5465
Closeness centrality	/	0.3908	0.4827	0.3597

Note. / indicates that the closeness centrality of the R & D network approaches 0 and is not displayed.