An empirical study on the economic linkage characteristics of Yangtze River port cities based on discrete second-order derivatives

Publié en ligne: 03 juin 2023

Reçu: 23 juin 2022

Accepté: 26 oct. 2022

DOI: https://doi.org/10.2478/amns.2023.1.00213

Mots clés

Discrete second-order derivatives, Hong Kong-city economic linkage, Correlation analysis method, Gray correlation model, Development indicators

© 2023 Fang Xie et al., published by Sciendo

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