粤港澳大湾区城市群知识多中心的演化过程与机理

马海涛,黄晓东,李迎成

The evolution and mechanisms of megalopolitan knowledge polycentricity of Guangdong-Hong Kong-Macao Greater Bay Area

MA Haitao,HUANG Xiaodong,LI Yingcheng

图5 1990-2016年各城市在不同尺度的合作发文量

Fig. 5 Number of GBA cities' co-publications at different geographical scales, 1990-2016