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针对现有的有效路径和有效路段两个概念存在的缺点 ,通过引入量化指标——临界相对差重新定义它们 ,对改进的多路径分配模型进行了深入探讨 ,并通过一个路网实例进行验证 ,取得了满意的结果 .
Aiming at the shortcomings of the two existing concepts of effective path and effective path, we introduce the quantitative index-critical relative difference and redefine them. The improved multipath assignment model is discussed in depth and verified by a road network instance. Satisfactory results have been achieved.