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首页> 外文期刊>International Journal of Production Research >Integrated optimisation of consolidation and stowage planning of steel coil ships using differential evolution
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Integrated optimisation of consolidation and stowage planning of steel coil ships using differential evolution

机译：综合优化钢圈船舶钢圈船舶的综合规划综合优化

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摘要

Consolidation plan (CP) and stowage plan (SP) of coil ships are to assign steel coils onto ships and decide specific loading location for each coil, respectively, which are two correlative and adjacent plans in the finished product logistics of iron and steel industry. In this paper, we focus on the problem of making an integrated plan of CP and SP (C&SPP), which is important and rarely studied, to try to achieve systematic optimisation from the perspectives of the product terminal, shipping companies, and customers, simultaneously. First, according to the practical situation, an integer programming (IP) model is established to optimise ship loading, transportation timeliness, and operation efficiency. Then, to improve calculating efficiency, the IP model is simplified (SIP) by reducing the dimensions of variables. After that, based on the problem features and algorithm behaviour, an improved differential evolution algorithm is proposed in which an element-dependent strategy is designed to set control parameter, a guided operator is constructed to generate mutant individual and an iteration-based mechanism is introduced to dynamically adjust the parameter and mutation strategy, respectively. Finally, extensive experiments are carried out to evaluate the proposed method, and the numerical results demonstrate its effectiveness in solving practical scale C&SPP.
机译：线圈船的整合计划（CP）和汇总计划（SP）是将钢卷分配到船上，并分别为钢铁工业成品物流中的两个相关和相邻的计划决定。在本文中，我们专注于制作CP和SP（C＆SPP）的综合计划的问题，这是重要的，很少研究，以同时从产品终端，航运公司和客户的角度来实现系统优化。首先，根据实际情况，建立整数编程（IP）模型，以优化船舶装载，运输及时性和运营效率。然后，为了提高计算效率，通过减少变量的尺寸来简化IP模型（SIP）。之后，基于问题特征和算法行为，提出了一种改进的差分演进算法，其中设计了一种元素依赖的策略来设置控制参数，构造一个引导操作者以产生突变体个体，并引入迭代的机构动态调整参数和突变策略。最后，进行了广泛的实验以评估所提出的方法，数值结果表明其在解决实际规模C＆SPP方面的有效性。

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