为探究城市社会经济发展水平与所属空铁枢纽类别之间的关系,以332个城市节点为研究对象,建立城市空铁综合枢纽类别的评价指标体系。分别采用熵值法加权的K-means聚类算法以及模糊C均值聚类算法对样本点枢纽类别进行划分,得出5种具有典型特征的枢纽类别划分结果。从区域和城市的角度进行对比分析,结果显示:K-means算法的分类较为严格,模糊C均值算法的分类更能识别出潜在枢纽;两种分类结果均呈现出国内东南沿海地区城市空铁综合枢纽等级较高、密度较大,而中西部地区城市空铁综合枢纽等级较低、较为分散的特点;单个城市节点虽受制于其社会经济发展水平、地理环境等,总体上其所属枢纽类别仍较为准确。两种分类方法分别在现实性和前瞻性的角度上合理。
In order to explore the relationship between social and economic development of cities and the category of its air-rail hub, taking 332 city nodes in China as research objects, an index system for the categories of cities′ air-rail hub was established. K-means clustering and FCM(Fuzzy C-Means) clustering weighted by entropy method were respectively adopted to conduct hub division of sample points, and 5 typical categories of air-rail hub were obtained. From the perspective of regions and cities, the classification of K-means clustering is strict, while the classification of FCM clustering is more able to identify potential hubs. The result of the two classifications shows that the level and density of the urban air-rail integrated hub in the southeast coastal areas are higher than that in the central and western regions. Although a single city node is subject to its social and economic development and geographical environment, generally its hub category is accurate. The two classification methods are reasonable from the view of reality and perspicacity respectively.
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