中文摘要：

多视角和多尺度城市网络逐渐成为认识空间关系的主要途径。公路流数据具有显著的空间依赖性和距离衰减特性，对于刻画区域尺度空间关系具有重要意义。基于全国地级行政单元间的公路客运流，论文尝试刻画中国城市网络功能结构和区域效应，并对其空间组织模式进行特征提取和规律挖掘，以期能够为城市网络研究提供新的方法支撑和认知视角。研究结果表明：①基于公路流的城市网络空间形态表现出强烈的空间依赖性和层级特征，与中国主要城市群分布存在较大程度的空间耦合，更多体现的是区域尺度的空间关系及核心-外围组合关系；②通过社区发现算法识别出19个城市经济区，其空间内涵主要包括行政区经济、巨型区域溢出效应和核心-边缘结构等；③不同地域系统内城市网络自成体系，表现出显著的空间依赖性和多元的空间组织模式，多层次、流动性和网络化的地域系统格局凸显；④从空间形态上看，区域城市网络空间结构大致可划分为单中心结构、双核心结构、多中心结构和低水平均势结构等区域关联形态，并以单中心发育模式为主。

英文摘要：

The multi-level perspective and multi-scalar city network have gradually become the critical pathways to understand spatial interactions and linkages. The road linkages represent distinguished characteristics of spatial dependence and distance decay, which is of great significance in depicting spatial relationships at regional scale. Based on the data of highway passenger flows between prefecture-level administrative units, this paper tries to identify the functional structures and regional impacts of China＇s city network, and further explores the spatial organization patterns of the existing functional regions, aiming to deepen the understanding of city network structure and provide new cognitive perspectives for the extant research. The empirical results are shown as follows： （1） It is immediately visible that the highway flows are extremely concentrated on the mega-regions of eastern coastal China and major economic zones in central and western China. And city networks based on highway flows demonstrate strong spatial dependence and hierarchical characteristics, which to a large extent has spatial coupling with the distributions of major mega-regions in China. It is a reflection of spatial relationships at regional scale and core-periphery structure. （2） A total of 19 communities that belong to important spatial configurations are identified through community detection algorithm, and we believe that they are urban economic regions within urban China. Their spatial metaphors can be concluded in three aspects. Firstly, many communities have the same boundaries with provincial level administrative units, which reveals that significant administrative region economy still exists in contemporary China. Secondly, trans-provincial linkages can be formed through spatial spillover effects of mega-regions within specific communities. Thirdly, cities located in the marginal areas of provinces and attracted by powerful center cities in neighboring provinces may become increasingly disconnected with their own pr