东北三省城际技术转移网络的空间演化及影响因素
刘承良,牛彩澄

Spatial evolution and factors of interurban technology transfer network in Northeast China from national to local perspectives
LIU Chengliang,NIU Caicheng
图1 基于城市加权度的东北—全国城际技术转移网络核心—边缘结构
Fig. 1 Core-periphery structure of urban weighted degree in the interurban technology transfer network between NE China and the whole country