中国地面交通线路密度的空间差异及变化

运用标准差、变差系数对我国三大地带及地带间地面交通线路密度的绝对差、相对差进行测度,发现三大地带内部及地带间交通线路密度的相对差和绝对差都很大且存在继续扩大的趋势。区位熵大于1的省域集中在东部,区位熵按东、中、西三大地带呈优势递减。地面交通线路密度与多数经济、社会因子的相关性都很强,与城市化水平的正相关性最强,与第一产业产值比重、工业化水平及第二产业产值比重呈负相关。主成分回归分析表明:三大主成分与地面交通线路密度具有很强的线性关系,各因子的作用大小不同。针对地面交通线路密度与城市化水平、第一产业产值比重、工业化水平及第二产业产值比重等典型影响因素的正、负相关性,探讨其成因。

Analysis on Spatial Difference of Land Transport Density and Its Change in China

Depend on the statistics from 1996 to 2005 about land transport density,the absolute deviation and relative deviation are measured by the way of standard deviation and variation coefficients,it indicates that there is a big gap among the three regions of China in absolute deviation and relative deviation.Through the farther analysis of location entropy,the result is that most of the provinces are located in east region for which the location entropies are more than 1.All of the western provinces are lower compared with the other regions about the location entropy.The research of correlation reveals that the relationship between land transport density and urbanization level is the most strong, but the primary industry,industrialization level,and the secondary industry have a negative correlation with land transport density.This paper use principal component analysis to study the dynamic correlation between land transport density and the effect factors.The result is showed that there is a strong linear dependence between land transport density and the factors.At last,this paper analyzes the cause of correlation among land transport density,urbanization,industrialization,and the secondary and the tertiary industry.