西部陆海新通道城市网络结构特性及其韧性研究

Based on the urban association network of the New Western Land-sea Corridor, this paper analyzes the network structures and characteristics of cities at different levels by using indicators such as urban centrality, urban association intensity, and average path. It also conducts an in - depth analysis of network resilience using the disruption model. The research results show that: the New Western Land - sea Corridor mainly forms an urban network spatial pattern of "one main center and multiple sub - centers"; as the level of the urban association network decreases, its structure transforms from a single - pole attraction type centered on Chengdu to a spatial pattern centered on the Chengdu - Chongqing urban agglomeration, with corresponding provincial capital cities as multiple sub - centers. At the same time, it shows preferential connection, and the sub - center cities exhibit strong radiation capabilities; in terms of network resilience, the disruption strategy based on node degree values has the greatest impact on network performance; three principal components, namely the living standards of residents, urban development potential, and the advantages of labor costs and resources, all have a certain impact on the urban network pattern of the New Western Land - sea Corridor. Accordingly, the development models of "growth poles", "axes", and "zones" are proposed, and corresponding urban nodes are to be protected with emphasis to improve the overall network resilience of the New Western Land - sea Corridor.

基于西部陆海新通道城市关联网络,运用城市中心性、城市关联强度和平均路径等指标,对不同等级城市网络结构及其特征进行分析,并运用中断模型对网络韧性进行深度分析.研究结果表明:西部陆海新通道主要形成"一主多副"的城市网络空间格局;随着城市关联网络等级的降低,其结构从以成都为中心的单极吸引型向以成渝城市群为中心、相应省会城市为多个副中心的空间格局转变,同时呈现出择优连接,其副中心城市呈现出较强的辐射能力;就网络韧性方面,基于节点度值的破坏策略对网络性能破坏程度最大;居民生活水平、城市发展潜力以及劳动力成本与资源优势3个主成分对西部陆海新通道城市网络格局均存在一定影响.据此提出"增长极""轴线"以及"片区"发展模式,并重点保护相应城市节点,提高西部陆海新通道整体网络韧性.