基于流强度的中国城市对外服务能力时空演变特征
柯文前, 陆玉麒, 俞肇元, 王晗, 陈伟, 马颖忆

Spatio-temporal Evolution Patterns of External Service Capabilities of Chinese Central Cities Based on Urban Flow Intensity
Wen-qian KE, Yu-qi LU, Zhao-yuan YU, Han WANG, Wei CHEN, Ying-yi MA
表2 基于时间的城市流强度K-means聚类结果
Table 2 Cluster results of city-flow intensity by K-means based of time
年份 最后类别 距中心点欧式距离
2004 1 1173.95872
2005 1 345.93390
2006 1 370.33728
2007 1 1140.23508
2008 2 879.87922
2009 2 197.22303
2010 2 993.49763