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路径流量唯一性实证研究

, PP. 84-91

Keywords: 交通工程,均衡网络,静态交通分配,比例一致性条件,路径流量,显著性检验

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Abstract:

传统静态交通分配方法无法获得稳定且唯一的路径流量解,解决该问题的一个方法是使用比例一致性条件.如果该条件能在实际路网中被证实(近似)成立,可为该条件的应用扫清理论上的障碍,从根本上解决基于路径流量分析结果中广泛存在的不唯一性问题.利用广东省高速公路路网数据,对符合比例一致性条件的路径对流量,基于最小二乘法构造特定的F统计量进行F检验,并通过诊断分析排除异常值的干扰.结果显示对广东省高速公路路网中符合条件的路径对流量分3种情况进行分析验证,得到相应的F观测值分别为5995.6012,1324.2747和699.5494.这表明在显著性水平为0.05的情况下,均能通过F检验,即比例一致性条件在实际路网上是存在的.

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