空间交互作用中的距离影响及定量分析

被引:50
作者
刘瑜
龚俐
童庆禧
机构
[1] 北京大学遥感与地理信息系统研究所
基金
广东省科技计划;
关键词
空间交互; 距离衰减; 重力模型; 解析法; 模拟法;
D O I
10.13209/j.0479-8023.2014.051
中图分类号
P208 [测绘数据库与信息系统];
学科分类号
070503 ; 081603 ; 0818 ; 081802 ;
摘要
对地理学研究中空间交互问题的距离衰减现象进行描述和分析,并总结重力模型的求解方法。首先,大部分空间交互都受到距离衰减效应的影响,距离衰减函数定量表示交互中距离的作用。对比幂律、指数等多种形式的距离衰减函数,认为幂律形式能够更好地刻画距离影响的本质特征,并且可以在不同交互中进行比较,其对应的交互模型即为在地理学和区域经济学中广泛应用的重力模型。然后,在重力模型的基础上,总结解析法和模拟法两大类基于给定交互矩阵和距离矩阵定量计算距离衰减函数及衰减系数的方法。由于难以先验确定交互公式中节点规模的数值,因此拟合重力模型,同时估计距离衰减系数,是应用重力模型的恰当方式。
引用
收藏
页码:526 / 534
页数:9
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