道路畅通度模糊综合评价及其应用  

Fuzzy Comprehensive Evaluation of Traffic Unblocked Degree and Its Application

作　　者：刘元林[1] 刘勇[2] 李红伟[1] 胡伍生[1] 

机构地区：[1]东南大学交通学院,南京210096 [2]新加坡国立大学土木与环境工程系,新加坡119223

出　　处：《武汉理工大学学报（交通科学与工程版）》2011年第5期892-895,共4页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：在应用修正模型时,采用三种不同的隶属函数作为该模糊事件的隶属函数来描述"不畅通"到"非常畅通"的过渡过程.对于每一种隶属函数,修正模型的输出结果为一个具体的实数,即畅通隶属度.因此,针对不同输入情况(比如说,不同路径)可以得到不同的输出结果.通过计算实例,对道路网的不同路径的畅通度进行比较,分析和比较了修正模型与其原模型.结果表明,修正模型的使用,简化了原模型的复杂程度,并且克服了原模型得出的结论不易于比较的缺点.This modification automatically reduced the number of membership function to one,and therefore the model is much simplified in terms of mathematical manipulations.There types of membership functions were used to describe a transition process from states of completely blocked to completely unblocked.A specific number,which was referred to as an unblocked membership grade,could be obtained as the result of the modified model.As a result,different choices of membership function and/or other input information（e.g.different paths） lead to different output numbers,and thereby a reasonable comparison could be conducted among those input information.As an illustrating example,the unblocked grades of different effective paths connecting a start point to an end point were analyzed.Comparison between the results of the original and modified models demonstrated that the latter not only reduced the complexity,but also made the model simpler for achieving a clear result.

关 键 词：道路畅通度 隶属函数 模糊事件 模型 应用 

分 类 号：U416[交通运输工程—道路与铁道工程]