PROGRESS IN GEOGRAPHY ›› 2023, Vol. 42 ›› Issue (1): 1-11.doi: 10.18306/dlkxjz.2023.01.001

• Articles •     Next Articles

Nonlinear characteristics of distance-decay parameter in intercity links: Based on human mobility big data

CHU Jun1(), TONG De1,*(), GU Hengyu2, CAO Zhiqiang1, PAN Xiangxiang1   

  1. 1. School of Urban Planning and Design, Peking University Shenzhen Graduate School, Laboratory for Urban Future, Peking University (Shenzhen), Shenzhen 518055, Guangdong, China
    2. Department of Geography and Resource Management, The Chinese University of Hong Kong, Hong Kong 999077, China
  • Received:2022-05-17 Revised:2022-10-05 Online:2023-01-28 Published:2023-02-06
  • Contact: TONG De E-mail:1099237261@qq.com;tongde@pkusz.edu.cn
  • Supported by:
    National Natural Science Foundation of China(41971205);The Stable Support Program Project of Shenzhen Municipal Science and Technology Innovation Committee(GXWD20201231165807007-20200812133137001)

Abstract:

Spatial interaction of human mobility is a heated topic for scholars, but little is known about the nonlinear relationship of the influencing factors in the spatial interaction. Using Tencent migration data in 2018 and employing the gradient boosting decision tree (GBDT) model, this study analyzed the nonlinear characteristics of the distance-decay parameter. The results show that: 1) In the annual data benchmark model the distance-decay parameter presents nonlinear characteristics; the partial dependence curve presents two "platform areas" where the distance-decay parameter is close to 0, and two "attenuation areas" where the distance-decay parameter is about 2.8; and the results are still robust using road-based distance or data from other years. 2) There are significant differences between the distance-decay parameters of aviation, railway, and road transportation. The distance-decay pattern during the Spring Festival is basically consistent with the annual benchmark model. We recommend to plan metropolitan areas and urban agglomerations according to the nonlinear characteristics of intercity connection influenced by distances-decay pattern, and optimize the layout of territorial development accordingly.

Key words: migration big data, intercity links, nonlinear, gradient boosting decision tree, distance-decay parameter