This paper investigates the problem of containership sailing speed and fleet deployment optimization in an intercontinental liner shipping network. Under the consideration of the time value of container cargo, three kinds of impact of sailing speed changes on long legs of each liner route are analysed, and a time-based freight rate strategy is proposed. Then, the optimization problem is formulated as a mixed-integer nonlinear programming. Its goal is to maximize the total profits of a container liner shipping. To find the optimal solution to the model and improve the efficiency of model solution, a discretization algorithm is proposed. Numerical results verify the applicability of the proposed model and the efficiency of the algorithm. In addition, the time-based freight rate strategy is able to achieve more profit compared to a fixed freight rate strategy.

中文翻译：

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基于时间差异化运费策略的集装箱船航行速度与舰队部署优化

本文研究了洲际班轮运输网络中集装箱船航行速度和船队部署优化的问题。在考虑集装箱货物时间价值的基础上，分析了航行速度变化对每种班轮航线长腿的三种影响，提出了基于时间的运价策略。然后，将优化问题表述为混合整数非线性规划。它的目标是使集装箱班轮运输的总利润最大化。为了找到模型的最优解并提高模型求解的效率，提出了一种离散化算法。数值结果验证了所提模型的适用性和算法的有效性。此外，