Table 1 Intercity cooperative innovation innovation network clusters.

From: The characteristics and influencing factors of spatial network of city-based innovation correlation in China: from the perspective of high tech zones

Innovate condensed subgroups

North hinterland subgroup

Eastern coastal subgroup

Southern region subgroup

Western cooperative subgroup

Degree Centrality CD

Point-in degree

10.13

23.19

11.09

4.24

Point-out degree

9.82

24.12

10.65

4.64

Centrality

19.96

47.31

21.74

8.88

Betweenness Centrality CC

22.85

29.43

25.43

15.73

Closeness Centrality CB

The inner Closeness Centrality

7.74

8.02

7.79

7.80

The outer Closeness Centrality

30.59

37.45

33.21

23.52

Centrality

279.06

285.89

259.98

263.16

E-I index

0.161

0.083

0.350

 − 0.199

Number of nodes

45

26

46

25

Innovation quality index

1447.29

2051.14

1623.65

1498.20