A Study on Estimating OD Trips From Observed Link Flows——Based on the Method of Iterative Procedure to Calculate OD on the Multi-path Assignment Model
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摘要: 在改进有效路段和有效路径定义的基础上, 采用随机—最短路多路径分配模型, 求解分配率矩阵, 建立了多路径分配模型的迭代反推方法, 并采用假设论证法检验了方法系统的可靠性、合理性。讨论了影响出行量推算结果的主要因素, 获得了因变于分配率矩阵的两个重要结论Abstract: A new iteration framework of estimating OD trips is established by a stochastic shortest path multi path assignment model to calculate the probability matrix P based on the two improved definitions of effective path and effective link.Meanwhile a hypothesis argumentation is put forward to examine the feasibility and rationality of the iteration method.Then the factors of influencing result of estimation are discussed.Finally two important conclusions resulted from P are obtained.
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