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arXiv 2602.01209math.OC
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区间运输问题最劣最优值的启发式方法

Heuristics for the Worst Optimal Value of Interval Transportation Problems

Prague University of Economics and Business(布拉格经济商业大学)

Elif Radová Garajová, Miroslav Rada

AI总结:

本文提出了一种膜算法,结合遗传算法和局部搜索,用于高效近似区间运输问题的最劣最优值,并通过实验验证其有效性。

摘要:

区间运输问题是一种运输问题模型,其中供应、需求和运输成本的值受到不确定性和在给定区间范围内独立变化的影响。解决区间规划模型的主要任务之一是计算所有可能的区间数据选择下的最佳和最劣最优值。尽管区间运输问题的最佳最优值可以在多项式时间内计算,但计算最劣(有限)最优值已被证明是NP难的。在本文中,我们加强了之前的结果,展示了寻找最劣最优值的准极值分解,并基于此结果,我们设计了高效的近似方法。通过简化场景编码,我们首先推导出一种局部搜索方法和一种遗传算法,用于近似最劣最优值。然后,我们将这两种方法整合成一种膜算法,该算法结合了遗传算法的进化改进和通过局部搜索实现的个体学习。此外,我们还包括了数值实验,以对三种不同的方法进行实际比较。我们还展示了所提出的膜算法在近似区间运输问题最劣最优值方面与现有最先进方法的竞争力,这通过在几个实例中找到新的最佳解来证明。

英文摘要:

An interval transportation problem represents a model for a transportation problem in which the values of supply, demand, and transportation costs are affected by uncertainty and can vary independently within given interval ranges. One of the main tasks of solving interval programming models is computing the best and worst optimal value over all possible choices of the interval data. Although the best optimal value of an interval transportation problem can be computed in polynomial time, computing the worst (finite) optimal value was proved to be NP-hard. In this paper, we strengthen a previous result showing a quasi-extreme decomposition for finding the worst optimal value, and building on the result, we design heuristics for efficiently approximating the value. Using a simplified encoding of the scenarios, we first derive a local search method and a genetic algorithm for approximating the worst optimal value. Then, we integrate the two methods into a memetic algorithm, which combines the evolutionary improvement of a genetic algorithm with individual learning implemented via local search. Moreover, we include numerical experiments for a practical comparison of the three different approaches. We also show that the proposed memetic algorithm is competitive with the available state-of-the-art methods for approximating the worst optimal value of interval transportation problems, this is demonstrated by finding the new best solutions for several instances, among others.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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