The Spatio-temporal Evolution of Economic Network Structure in Guanzhong Plain Urban Agglomeration

摘要

The spatial and temporal evolution characteristics of network structure of Guanzhong Plain urban agglomeration from 2005 to 2015 are analyzed from the economic perspective by using the modified gravity model and the SNA method. Results show that: (1) Economic network of urban agglomeration has experienced the evolution from the primary to intermediate phase. The backbone network is composed of Xi'an, Tongchuan, Xianyang, Baoji, Weinan, taking Xi'an as the center, with the axis to develop Lanzhou-Lianyungang. (2) During 10 years, although radiation and agglomeration intensity of 12 cities increase significantly, the polarization difference between the first city and the last one is also expanding. (3) The network hierarchy of urban agglomeration needs to be improved. Only Xi'an has the strong radiation-driven ability among the 12 cities, while Baoji as the central city of the western region is weak. (4) Affected by geographical locations, cities with intermediate interests are mostly located in the central region, and 6 peripheral cities have not yet obtained intermediary interests.