关键词: 航空运输, 机场群同质化, 多维多层, 相似系数, 聚类分析, 长三角世界级机场群

Abstract: Excessive homogeneity within airport clusters tends to result in significant resource waste, which is detrimental to their integrated and refined development. To address the issue of airport cluster homogeneity, this study establishes a multi-dimensional and hierarchical evaluation index system covering infrastructure, production scale, route networks, and urban economic efficiency. Based on this system, a combination of subjective and objective methods is adopted to calculate indicator weights, and a formula for the homogeneity coefficient is defined using the modified similarity coefficient method. Finally, taking the Yangtze River Delta airport cluster as a case study, cluster analysis is employed to analyze its homogeneity, while the Euclidean distance method is used to verify the reliability of the proposed approach. The results indicate that the established index system fully reflects the impacts of all indicators on the homogeneity of world-class airport clusters, with the economic efficiency of the host city of the airport exerting a particularly significant influence. Furthermore, targeted recommendations are put forward for airports with different homogeneity levels within the Yangtze River Delta airport cluster. The research conclusions hold certain practical significance for promoting the high-quality development of China′s worldclass airport clusters

Key words: air transportation, airport cluster homogeneity, multi -dimensional and hierarchical, similarity coefficient; cluster analysis, Yangtze River Delta world-class airport cluster