针对城市地表空间异质性和交通可达性测度问题,提出一种基于地理信息系统(Geographical Information System,GIS)的网络分析和距离成本加权算法,研究城市公交车路网的空间距离和时间可达性.利用网络拓扑模型构建汉中市道路节点-链路网络...针对城市地表空间异质性和交通可达性测度问题,提出一种基于地理信息系统(Geographical Information System,GIS)的网络分析和距离成本加权算法,研究城市公交车路网的空间距离和时间可达性.利用网络拓扑模型构建汉中市道路节点-链路网络;采用两步移动搜寻法(Two-step Floating Catchment Area method,TFCA),考虑社区单元人口、公共设施、土地利用和城市规划等约束成本,分析城市公交车网络覆盖区域的距离可达性、时间可达性和综合可达性.结果表明:汉中市公交车网络的时间和距离可达性值,由中心城区向主城区、近郊区和远郊区的依次减弱.中心城区和主城区的公交车网络的可达时间小于20 min,可达距离小于5 km;市远郊区和偏远乡镇的公交车可达时间大于50 min,可达距离大于10 km.未考虑公交路线之间的闭合和站点优化问题,市远郊区的公交车覆盖区域的时间和距离可达性较差.展开更多
In this paper, we demonstrate that the eco-industrial network equilibrium model of link flow version previously introduced can be reformulated as a transportation network equilibrium problem of path flow version. Then...In this paper, we demonstrate that the eco-industrial network equilibrium model of link flow version previously introduced can be reformulated as a transportation network equilibrium problem of path flow version. Then, some methodological tools mainly applied in the field of transportation science can be used to discuss the eco-industrial chain network problem. What the highlighted contribution lies in is that the paper not only expands theory of supply chain model with reducing path flow but also generalizes the traditional transportation network equilibrium problem by new applications.展开更多
基金Sponsored by the Fundamental Research Funds for the Central Universitiesthe Research Funds of Renmin University of China(Grant No.13XNH169)
文摘In this paper, we demonstrate that the eco-industrial network equilibrium model of link flow version previously introduced can be reformulated as a transportation network equilibrium problem of path flow version. Then, some methodological tools mainly applied in the field of transportation science can be used to discuss the eco-industrial chain network problem. What the highlighted contribution lies in is that the paper not only expands theory of supply chain model with reducing path flow but also generalizes the traditional transportation network equilibrium problem by new applications.
