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Dynamic Vehicle Routing Problems with Enhanced Ant Colony Optimization

机译:改进蚁群算法的动态车辆路径问题

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As we all know, there are a great number of optimization problems in the world. One of the relatively complicated and high-level problems is the vehicle routing problem (VRP). Dynamic vehicle routing problem (DVRP) is a major variant of VRP, and it is closer to real logistic scene. In DVRP, the customers’ demands appear with time, and the unserved customers’ points must be updated and rearranged while carrying out the programming paths. Owing to the complexity and significance of the problem, DVRP applications have grabbed the attention of researchers in the past two decades. In this paper, we have two main contributions to solving DVRP. Firstly, DVRP is solved with enhanced Ant Colony Optimization (E-ACO), which is the traditional Ant Colony Optimization (ACO) fusing improved K-means and crossover operation. K-means can divide the region with the most reasonable distance, while ACO using crossover is applied to extend search space and avoid falling into local optimum prematurely. Secondly, several new evaluation benchmarks are proposed, which can objectively and comprehensively estimate the proposed method. In the experiment, the results for different scale problems are compared to those of previously published papers. Experimental results show that the algorithm is feasible and efficient.
机译:众所周知,世界上存在许多优化问题。相对复杂和高级的问题之一是车辆路径问题(VRP)。动态车辆路径问题(DVRP)是VRP的主要变体,它更接近真实的物流现场。在DVRP中,客户的需求随着时间而出现,并且在执行编程路径时必须更新和重新排列未服务的客户的积分。由于问题的复杂性和重要性,在过去的二十年中,DVRP应用引起了研究人员的关注。在本文中,我们对解决DVRP有两个主要贡献。首先,通过增强蚁群优化(E-ACO)解决DVRP,这是传统的蚁群优化(ACO),融合了改进的K均值和交叉操作。 K均值可以以最合理的距离划分区域,而使用交叉法的ACO可以扩展搜索空间并避免过早陷入局部最优。其次,提出了几种新的评价基准,可以客观,全面地评价所提出的方法。在实验中,将针对不同规模问题的结果与以前发表的论文进行了比较。实验结果表明,该算法是可行,有效的。

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