摘要
交通网络中心性是测度交通网络及社会经济活动可达性的有效手段。从交通网络中心性视角,结合可达时间研究长春市中心城区大型综合医院空间可达性。大型综合医院邻近度和中间性与距离(到人民广场路网距离)均呈负相关,在距人民广场最近处二者大致相等且最高,随着距离的增加,邻近度超过中间性。距人民广场4740—5799米处中间性超过邻近度并形成高值分布区,7862—8400米处二者均降到最低。约33.3%的大型综合医院空间可达性最好,其集中分布于以人民广场为中心的城市中心。空间可达性最差的大型综合医院约占总数的24.1%,多分布于城市边缘。空间可达性较差的大型综合医院为数不多,且多分布于城市周边。但高邻近度、高中间性、可达时间较长的大型综合医院主要分布于安达街沿线。高邻近度、低中间性,可达时间较短的大型综合医院则多分布于火车站前与新民大街沿线等城市中心位置。
Street network centrality is calibrated in a multiple centrality assessment model（MCA）composed of multiple measures such as closeness, betweenness, and straightness. By using UNA developed by MIT,the paper will discuss the spatial accessibility of large general hospitals from the perspective of street network centrality. Firstly, the paper examines the street centrality indices in Changchun. Secondly, by creating buffer of every large general hospital, the research will calculating the average value of the street centrality indices（closeness and betweenness）, which can be used as the quotas of the spatial accessibility of large general hospitals. Thirdly, the Kriging method is applied to street centralities so that the spatial distribution characteristics of it can be explained. Besides, the relationship between the spatial accessibility of large general hospitals and the distances to Renmin square are showed by correlation coefficient and regression model.Fourthly, all of the street network distance of every large general hospital to Renmin square is divided into eight segments to calculate the average value of the spatial accessibility of large general hospitals, which will be z-standardized. And then the conditions of two spatial accessibility indices of large general hospitals with the change of distances to Renmin square will be compared. Lastly, the spatial accessibility of large general hospitals will be classified into eight types, including H-H-L, H-H-H, H-L-L, H-L-H, L-H-L, L-H-H, L-L-L,L-L-H.
出处
《人文地理》
CSSCI
北大核心
2014年第5期81-87,共7页
Human Geography
基金
国家自然科学基金项目(41071109)
关键词
交通网络中心性
多中心性评价模型
空间可达性
大型综合医院
长春市中心城区
street network centrality
Multiple Centrality Assessment Model
spatial accessibility
large general hospitals
Changchun city center
