中文摘要：

提出了交通网络下的一种时空棱柱面表示方法,即时空棱柱面不仅表达了路段节点的时空可达性,而且全局性地表达了整个路段,包括可达路段上所有点的时空可达性;给出了时空棱柱面的形式化表达式和生成步骤;以动态需求的车辆路径问题求解为例,说明了时空棱柱在物流中的一个实际应用。

英文摘要：

Space time prism（STP） is a key concept in time geography,a methodology framework in which the three dimensional space is compressed into two dimensional plane and the time is treated as the third dimension.STP has been widely adopted by many researchers for human accessibility and human activity research.In traditional STP representation,space is assumed to be continuous without considering the limitation of the transportation network.Recent researches take into account the transportation network and depict the STP as vertical lines,however,they only express the accessibility of transportation nodes.To address these problems,we present a new method,named STP surface,to represent the accessibility of any part in the potential paths.A process is also presented to generate this kind of STP,based on ArcGIS service area function,as well as the STP interpolation formulation.Finally,we adopt vehicle routing problem with dynamic customer demands as an example,to explain the application of the space time prism that proposed in this paper.