【摘要】 文章分析了三级水平上的城市影响域 ,指出产业差异是形成城市间联系的基本动力 ,并通过交通和通讯网络得以实现 ,历史基础和城市等级规模在本区域城市联系的形成中具有特殊作用。进一步论述了差异巨大、结构畸形为特征的城市群等级规模特点 ,分析了职能结构细化特征 ,阐明了城市群空间网络框架、集聚分布型式和三级多核圈层分布规律。最后提出城市群结构优化的措施 :加快城市化进程 ,扩大城市群体规模 ,进一步强化核心城市西安的中心作用 ,形成以首位城市为核心的城市群内部联系网络 ,城市发展轴线的多元化和与周边城市群联系的强化。更多还原

【Abstract】 This paper analyse urban influence regions in three degrees. Industrial difference is the basic impetus that forming contact between cities, which realize the aims by the network of traffic and communication. There has a special function of history base and urban levels in the formation of regional urban contact. The features of degree-scale that take great difference, lopsided structure as characters have been discussed in the urban agglomeration. The thesis has researched detailed traits of function-structure and expounded the framework of spacial network, the pattern of collective distribution and distributed regular of three degrees, multiple cores, circinal levels in the urban agglomeration. At last, the measures that optimize the structures of urban agglomeration are put forward, namely, quickening urbanization course, enlarging scale of urban agglomeration, intensifying central function of Xi′an, forming contact network in urban agglomeration which takes primacy city as core, taking several urban development axes and intensifying contact with other border urban agglomeration.更多还原