模糊因素在道路网选取过程中的应用及评价

Application and Evaluation of Fuzzy Factors in Road Network Selection

道路网选取因素的确定是道路网选取的基础。针对已有算法没有充分考虑模糊因素在道路选取时的作用的问题,提出了道路选取过程中应考虑到的几种模糊因素,借助模糊数学综合评价方法对其进行了综合评价,并将评价结果与基于网眼密度的道路网选取算法进行了融合。实验表明,考虑了模糊因素后的道路网选取在继承了基于网眼密度算法优点的基础上保留了某些交通流量大、具有历史意义或经济价值的"重要"道路,相应地删除了个别同等级但上述意义相对较小的道路,道路网选取结果更加合理,更加符合人们的实际需求。

The determination of selected factors is the basis of road network selection,but the existing algorithms seldom take fuzzy factors into account.Based on it,several fuzzy factors which should be taken into account in the process of road network selection are proposed,and a comprehensive evaluation is made by means of fuzzy mathematical method,in addition,the evaluated result is brought into the road network selection based on mesh density.Experiment shows that the results taking the fuzzy factors into account not only inherit the advantages of algorithm based on mesh density,but also keep the“important” roads which have large flow of people or have historical meanings or have economic value,and delete some“unimportant”roads which have the same grade but few foregoing meanings accordingly,which is more reasonable in line with people’s actual needs.