Research Article
Green Technology Collaboration Network Analysis of China’s Transportation Sector: A Patent-Based Analysis
Table 2
Top 10 nodes with degree centrality, betweenness centrality, or closeness centrality in the GTTs collaborative network.
| | Degree centrality | Betweenness centrality | Closeness centrality | | Node | Degree | Out degree | In degree | Node | Betweenness | Node | Closeness |
| | State Grid | 51 | 17 | 34 | State Grid | 575.0 | State Grid | 1.000 | | China Shenhua Energy | 40 | 0 | 40 | China Railway | 344.0 | China Railway 6th Engineering | 1.000 | | China Railway | 23 | 6 | 17 | CRRC Times Electric | 309.0 | Guangzhou Metro | 1.000 | | Geely Holding Group | 11 | 6 | 5 | CRRC Qingdao Sifang | 242.5 | CRRC Qingdao Sifang | 1.000 | | Railway Transport Bureau | 10 | 0 | 10 | Zhuzhou Times Electric technology | 233.0 | Liaoning Chaoyang New Energy | 1.000 | | CRRC Times Electric | 7 | 4 | 3 | Qingdao Yatongda | 103.0 | Geely Holding Group | 0.857 | | China Railway 12th Bureau | 7 | 3 | 4 | CRRC Qingdao Sifang | 101.0 | CNPC | 0.833 | | SH Metro Consulting | 7 | 3 | 4 | SH Metro Consulting | 84.0 | State Grid, Shandong | 0.800 | | Guangzhou Metro | 7 | 2 | 5 | Beijing Huaxing Zhiyuan Technology | 78.0 | Qiqihar Railway Rolling | 0.800 | | CRRC Qingdao Sifang | 7 | 2 | 5 | Nanjing Kangni Mechanical and Electronical | 46.0 | China Railway | 0.778 |
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