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The study of multi-level modeling of accessibility in urban space

城市空间可达性多层次建模研究

基本信息

批准号：
15500679
负责人：
MIZUNO Isao
金额：
$ 0.77万
依托单位：
Ochanomizu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

Most of locational analysis are not relevant to model the accessibility in some complicated urban space because they have been based on the concept of "linear" distance. The author aims to make another concept of accessibility concerning to the connectivity among diverse transportation and communication systems, using the multi-level modeling approach of scale-dependent viewpoint with GIS, and furthermore, to look into the availability of the concept in the real urban space.Firstly, the author explored how the ideas of fractal, chaos, and self-organization can be applied to understand the becoming urban systems. The results of the exploration implies that it is important to conceptualize the accessibility dependent on each scale and defined in local space, rather than that is linearly proportionate to distance. Secondly, he examined the "entropy-maximizing models" originated by Alan Wilson from a viewpoint of analogy and rhetoric. He suggests that the models are problematic for the linear relationship among macro-, meso-, and micro-level aggregation on one hand, and for the closed system modeling on the other hand. Thirdly, the author compared two similar methodology of MDS and Q-analysis to make a more dynamic and evolutionary model of urban systems concerning to time-space convergence. He concludes that Q-analysis can be more relevant to treat a qualitative system change such as articulation, dependence, conurbation, and isolation in national urban space, compared to the MDS's quantitative transformation method.

大多数的区位分析都是基于“线性”距离的概念，无法对复杂的城市空间中的可达性进行建模。基于GIS的尺度依赖视角的多层次建模方法，提出了可达性的另一种概念，并探讨了可达性概念在现实城市空间中的可用性。首先，作者探讨了如何运用分形、混沌和自组织的思想来理解正在形成的城市体系。探索的结果表明，重要的是将可达性概念化，依赖于每个尺度并在局部空间中定义，而不是与距离成线性比例。其次，他从类比和修辞的角度考察了艾伦·威尔逊提出的“熵最大化模型”。他认为，这些模型一方面存在宏观、中观和微观层面聚合之间的线性关系问题，另一方面存在封闭系统建模问题。第三，通过比较MDS和q分析两种相似的方法，构建了一个考虑时空收敛性的更具动态性和演化性的城市系统模型。他的结论是，与MDS的定量转换方法相比，q分析更适合于处理国家城市空间中的衔接性、依赖性、聚集性和隔离性等定性系统变化。