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中文摘要：
传统物流作业调度主要对单级或两级之间的协调问题进行建模和求解，缺乏对物流作业多级特征的考虑．针对物流装卸搬运多级作业链的复杂性，以批量作业完成时间为目标，研究单元化“装卸，搬运，装卸”三级作业链的集成调度优化作业问题，并在此基础上提出解决三级协调与集成优化问题的三层嵌套进化算法．通过算例仿真及其分析可得目标值和求解时间会随着问题规模扩大呈多项式曲线增长以及搬运级是三级装卸搬运效率的瓶颈环节，最后分析了其原因并提出相应解决方案．
英文摘要：
Traditional studies on logistical operational scheduling primarily focus on models and algo-rithms for single-stage or double-stage coordination problems, lack of attention on multi-stage operations.Considering the complex features of multi-stage operations in logistical material handling chains, a three-stage coordination problem of unit material handling operations is studied to minimize makespan. And athree-stage evolutionary algorithm is proposed to solve the problem. Through the case study and analysiswhich can get conclusions that tile optimal object and solving time have a polynomial relationship withgrowing size of the problem, and the transportation stage is the bottleneck of the whole operational chain.Finally analysis of corresponding reasons and solutions are proposed.
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