Spatial Network Structures of Urban Agglomeration Based on the Improved Gravity Model: A Case Study in China’s Two Urban Agglomerations

Table 3

Urban link and network grades of cities in the YRDUA.

Grade	City network characteristics	Weighted degree	Cities
1	Network radiation center	5910646-14972218	Shanghai, Suzhou
2	Advanced network node	1342193-5910645	Changzhou
3	Intermediate network node	192079-1342192	Nanjing, Hangzhou, Wuxi, and Shaoxing,
			Zhenjiang, Jiaxing, Yangzhou, Taizhou,
			and Ma’anshan
4	Primary network node	7452-192078	Huzhou, Wuhu, Nantong, Ningbo,
			Chuzhou, Hefei, Yancheng, Tongling,
			Zhoushan, Wenzhou, Xuancheng, Taizhou, Jinhua, Chizhou, and Anqing

Note: Taizhou, which is a Grade 3 city, is located in Jiangsu Province, and Taizhou, which is a Grade 4 city, is located in Zhejiang Province.