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交通探测车的样本量模型

, PP. 111-116

Keywords: 智能运输系统,样本量模型,曲线拟合,探测车,路网覆盖率

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Abstract:

全面回顾了探测车样本量问题的研究,分析了现有模型中的不足,并从路段和路网两个层面探讨了交通探测车样本量问题。将路段样本量问题归结为一个有限总体的无放回简单随机抽样问题,并给出了修正的路段样本量模型。结果表明,修正的路段样本量模型确定的最小样本量小于现有的模型。引入了路网覆盖率,给出了路网样本量的通用模型,该模型将路段样本量和路网样本量统一起来。以国内某大城市出租车GPS数据为例,建立了在不同的时段特征和路段样本量要求下,路网覆盖率与探测车总数量之间的函数关系。

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