摘要
最短路径问题(SP)是人工智能的一个活跃研究方向,也是交通网络分析系统的一个最基本问题,在理论和应用上有着广泛而深入的研究。本文从应用的角度,结合地理信息系统(GIS)的特点,设计了一种新的数据存储结构,改进节点搜索方法,并建立一种简捷的估价函数,为进一步解决交通网络的综合分析打下了基础。
Best first search is a general heuristic search algorithm for shortest path problem.Its applicability is limited by its exponential memory requirement.In this paper,a new data structure for storing traffic network is presented.The search procedure is improved on the advantage of this data structure.On the other hand,a new heuristic estimate function based on the characteristic of GIS is discussed in this paper.The improved algorithm is used in a traffic analysis system.
出处
《中国图象图形学报(A辑)》
CSCD
1998年第1期39-43,共5页
Journal of Image and Graphics
关键词
最短路径问题
地理信息系统
优先搜索算法
Shortest path problem,Best first search, Geographical information system