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基于云模型的道路交通安全等级评价

Keywords: 交通运输系统工程,道路交通安全,云模型,评价指标,隶属度

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Abstract:

针对道路交通安全等级评价具有的模糊性和随机性特性,提出了道路交通安全等级云模型评价方法.通过分析道路交通安全的影响因素,确定评价指标及标准;计算出每个评价指标的云数字特征,生成各指标云模型;评价实测数据,由最大隶属度的加权值确定道路安全等级.对西安市二环路实测数据进行评价,评价结果为:东二环、南二环、北二环路道路交通较安全,隶属度U(域)分别为:0.4048、0.6098和0.4976;西二环路道路交通基本安全,隶属度U(芋)为0.6212.对比灰色评价法和模糊数学法,云模型法不仅能反映出道路交通安全等级,更能精确反映所隶属等级的确定度.

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