After their discretion, it is possible to obtain the expression and analytical approximation for the annual probability of exceedance.
离散化之后，得到年超越概率的综合表达式及其相应的解析近似。
A comparison is made between the experimental results and the numerical calculation to verify the usefulness of this analytical approximation.
将数值计算的结果和实验数据进行了比对验证了解析结果的实用性。
Based on different demand cases, a single point estimation method based on demand approximation and an analytical expression method based on traffic equilibrium model were put forward.
针对不同的需求情形，分别提出了求解交通平衡模型的基于需求点逼近的点估计法和基于模型的表达式分析法。
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