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arXiv 2108.09233math.OCcs.DS
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列生成的迂回对偶最优不等式及其在路由和定位中的应用

Detour Dual Optimal Inequalities for Column Generation with Application to Routing and Location

Julian Yarkony, Naveed Haghani, Amelia Regan

摘要:

以车辆路径为例,研究物流最优化问题的加速列生成问题。不失一般性,我们专注于容量限制车辆路径问题(CVRP)通过添加一类新的双重最优不等式(DOI),将信息从车辆路线绕行。这些不等式扩展了光滑DOI最近在文献中介绍的某些类别的集合覆盖问题的CG解决方案。本文中介绍的Detour-DOI允许给定活动路线上的物品与该路线上的其他物品附近的物品之间的低成本交换操作,以估计(并限制)对偶变量的值。相比之下,Smooth-DOI只允许在附近的项目之间进行低成本的交换操作。Detour-DOI的使用允许CG的更快收敛而不削弱线性规划松弛。然后,我们认为,这些DOI也可以方便地应用于单源容量限制设施定位问题。这些问题已经被证明是等价于一个广泛的物流最优化问题,其中包括,例如,电信网络设计和生产规划。开发更高效的列生成求解器的重要性怎么强调都不过分。Detour-DOI允许用变量的有限集来表示大量的列,有助于这一重要的努力。

英文摘要:

We consider the problem of accelerating column generation (CG) for logistics optimization problems using vehicle routing as an example. Without loss of generality, we focus on the Capacitated Vehicle Routing Problem (CVRP) via the addition of a new class of dual optimal inequalities (DOI) that incorporate information about detours from the vehicle routes. These inequalities extend the Smooth-DOI recently introduced in the literature for the solution of certain classes of set-covering problems by CG. The Detour-DOI introduced in this article permit low cost swap operations between items on a given active route with items near to other items on that route to estimate (and bound) the values of the dual variables. Smooth-DOI in contrast only permit low cost swap operations between nearby items. The use of Detour-DOI permits a faster convergence of CG without weakening the linear programming relaxation. We then argue that these DOI can also be conveniently applied to single source capacitated facility location problems. These problems have been shown to be equivalent to a broad class of logistics optimization problems that include, for example telecommunication network design and production planning. The importance of developing vastly more efficient column generation solvers cannot be overstated. Detour-DOI, which permit large numbers of columns to be expressed with a finite set of variables, contributes to this important endeavor.

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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