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arXiv 2107.13641cs.AImath.OC
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时间依赖旅行推销员问题的学习上界

Learned upper bounds for the Time-Dependent Travelling Salesman Problem

Università del Salento(萨伦托大学)

Tommaso Adamo, Gianpaolo Ghiani, Pierpaolo Greco, Emanuela Guerriero

摘要:

给定一个图,其弧遍历时间随时间变化,时间相关旅行推销员问题在于找到一个最小的总持续时间覆盖图的顶点的哈密尔顿旅游。这项工作的主要目标是通过重用在解决具有相似特征的实例时获得的信息来定义该问题的严格上限。这在配送管理中是常见的,在配送管理中,必须使用类似的输入数据一次又一次地生成车辆路线。为此,我们设计了一个上界技术的基础上解决一个经典的(和更简单的)时间无关的非对称旅行推销员问题,其中的恒定弧成本适当地定义了一个线性规划和混合的无监督和监督机器学习技术的组合使用。这种方法的有效性进行了评估,通过计算运动的两个欧洲城市:巴黎和伦敦的真实旅行时间的功能。我们的启发式和最知名的解决方案之间的整体平均差距约为0.001\%。对于31个实例,已经获得了新的最佳解。

英文摘要:

Given a graph whose arc traversal times vary over time, the Time-Dependent Travelling Salesman Problem consists in finding a Hamiltonian tour of least total duration covering the vertices of the graph. The main goal of this work is to define tight upper bounds for this problem by reusing the information gained when solving instances with similar features. This is customary in distribution management, where vehicle routes have to be generated over and over again with similar input data. To this aim, we devise an upper bounding technique based on the solution of a classical (and simpler) time-independent Asymmetric Travelling Salesman Problem, where the constant arc costs are suitably defined by the combined use of a Linear Program and a mix of unsupervised and supervised Machine Learning techniques. The effectiveness of this approach has been assessed through a computational campaign on the real travel time functions of two European cities: Paris and London. The overall average gap between our heuristic and the best-known solutions is about 0.001\%. For 31 instances, new best solutions have been obtained.

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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