• 产业发展与区域经济 •

### 中国交通流的衰减函数模拟及特征

1. 中国科学院地理科学与资源研究所|北京 100101
• 出版日期:2009-09-25 发布日期:2009-09-25
• 通讯作者: 王成金（1975-），男，山东沂水人，主要从事交通地理研究。 E-mail:cjwang@igsnrr.ac.cn
• 基金资助:

国家自然科学基金项目（40701045、40635026）；中科院创新工程方向项目（KZCXZ-YW-Q10-4-1）

### Function Simulation and Regularity of Distance Decay of Inter-Urban Traffic Flow in China

WANG |Chengjin

1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101|China
• Online:2009-09-25 Published:2009-09-25

Abstract:

Distance is always an important parameter of spatial interaction models in geography and influences the range and depth of many social and economic activities. There is a close and important linkage between traffic flow and distance. So the regularity of distance decay of traffic flow becomes the important research field of transportation geography and economic geography. Based on the review and comment on research progress of distance decay regularity of traffic flow in foreign countries and China, we narrated the studying data and city specimens applied in this paper, and introduced the primary modals of distance decay function, including exponent model, Pareto model, logarithm model, square exponent model and extraction exponent model. Then we simulated the five distance decay model applying inter-urban traffic flow in China, including road passengers flow, railway passengers flow and railway cargo flow, and aviation passengers flow. We discussed the several parameters of their simulating results including distance decay coefficient b, correlation coefficient R and test parameters (namely F and T), especially provided a comparative analysis. According to the analytical result and simulating parameter, we chose the optimal function model of distance decay of traffic flow, namely, Pareto model, and wrote the specific function formulations of the four traffic flow modals.  So we further analyzed the parameter difference of four distance decay models and their geographical implication, especially the relation between distance decay coefficient b and the application distance of four traffic flow modals, and their changes about distance decay parameter of temporal inter-urban railway passengers and cargoes flow and their spatial explanation. To provide a further explanation, it is necessary to do so through analyzing the traffic flows and related social-economic index. So we protracted the accumulative ratio curves and distribution ratio curves of four traffic flows, and demonstrated the distance decay model of traffic flow, their parameter and decay regularity which provided an experiential discussion.