摘要
实践中,交通工程师会采用不同的指标来分析道路上同一时空节点的交通运行状态.不同的运行指标从不同的侧面描述交通运行的实现过程,各指标作为同一交通运行现象的外部特征表述,不可避免的存在对交通运行状况刻画程度上的差异.从信息论的角度来认识这一问题,对于同一交通运行信息源各指标所包含的信息量不同,文中通过引入信息熵方法,量化不同运行指标对交通运行状态的刻画程度,并通过案例对指标信息熵值的判定和排序进行解释和分析,研究表明该方法可广泛应用于不同环境下运行指标的筛选.
In practise,traffic engineers will take on different indexes to analyse the traffic performance of a same spatiotemporal node.Different indexes describe the realization process of traffic operation from different profiles,and as the external features expressions of a same traffic operation phenomena,differences in the extent exist among the indexes.From the perspective of information theory,content of information of various indexes differs from each other.Therefore,information entropy is proposed to estimate the depicting degree of various indexes to traffic operation,whereafter,by determining and ordering the information entropy,it could be broadly applied into the filtration of indexes in different environments.
出处
《武汉理工大学学报（交通科学与工程版）》
2011年第5期928-930,935,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
关键词
信息容量
交通运行
指标分析
信息熵
information capacity
traffic operation
index analysis
information entropy
