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基于影响因素可靠度的改进OD反推算法

, PP. 103-108

Keywords: 交通工程,OD反推算法,理论分析,先验矩阵,观测流量,贡献度,可靠度

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Abstract:

?通过4组测试方案,采用敏感性分析、数理统计分析方法分析了先验矩阵总量、分布结构以及观测OD对数量对OD反推结果的影响程度;提出了考虑先验矩阵和观测路段流量可靠度的改进极大熵算法。研究结果表明:先验矩阵总量基本不影响OD反推结果;先验矩阵分布结构决定着反推结果的准确性;OD反推要求观测路段包含所有OD对,且OD对数量越多,反推结果越准确,基本不会出现OD信息冗余;在反推过程中考虑先验矩阵和观测路段流量可靠度,有助于提高反推精度。

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