Then we proposed a stochastic expected value model to improve the on-line performance of timetable and reduce total travel time on the basis of considering interactions among various slack times.

首先，给出了冗余时间的含义与分类，探讨了冗余时间对列车运行图动态性能的影响过程，并分析了多种冗余时间之间的关系。

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Aiming at the uncertain networks, the shortest path problem with stochastic parameters is studied and the expected value model with constraints is constructed.

针对不确定网络，研究具有随机参数的最短路径问题，采用随机数表示路径权值的不确定性，建立有约束的期望最短路模型。

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In this paper, an expected value programming model is introduced for a continuous production-inventory system with stochastic production cost and stochastic demand.

建立了具有随机生产费用和随机需求的连续生产存贮系统的期望值规划模型，运用动态规划方法给出了最优控制策略。

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