兰西城市群“双核分离”结构探讨：区域经济一体化背景下民营企业的投资网络

周恒, 杨永春

Dual-core separation structure of the Lanzhou-Xining urban agglomeration: Investment network of private enterprises under the background of regional economic integration

ZHOU Heng, YANG Yongchun

图2 兰西城市群各产业投资网络演化

Fig.2 Evolution of the investment networks of industries in the Lanzhou-Xining urban agglomeration