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

Publicado en línea: 03 jun 2023

Recibido: 23 jun 2022

Aceptado: 26 oct 2022

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

Palabras clave

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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