arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.08490math.OC
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具有决策相关信息发现的鲁棒Optimization

Robust Optimization with Decision-Dependent Information Discovery

Phebe Vayanos, Angelos Georghiou, Han Yu

摘要:

鲁棒优化是一种流行的模式,用于建模和解决受不确定性影响的两阶段和多阶段决策问题。在许多现实世界的应用中,信息发现的时间是依赖于决策的,不确定的参数只有在通常昂贵的投资之后才变得可观察。然而,大多数的文献假设,不确定的参数可以免费观察到的顺序,他们透露是独立的决策者的行动。为了填补这个空白。我们考虑两阶段和多阶段鲁棒最优化问题,其中部分决策变量控制信息发现的时间。因此,信息可以通过在前几个阶段进行战略探索性投资来发现(至少部分)。我们提出了一个新的动态制定的问题,并证明其正确性。我们利用我们的模型提供一个解决方案的方法,灵感来自K-适应性近似。我们将问题重新表述为有限混合整数(分别为)。bilinear)程序,如果没有(分别某些决策变量是实值的。这个有限的程序可以用现成的求解器来求解。我们推广我们的方法,以最小化分段线性凸函数。我们证明了我们的方法在解释性,最优性和速度方面的有效性的潘多拉盒子问题,偏好诱导问题,最佳盒子问题,和R&D项目组合最优化问题的合成实例。最后,我们评估它的一个实例的主动偏好诱导问题,用于推荐肾脏分配政策的决策者在联合网络器官共享。

英文摘要:

Robust optimization is a popular paradigm for modeling and solving two- and multi-stage decision-making problems affected by uncertainty. In many real-world applications, the time of information discovery is decision-dependent and the uncertain parameters only become observable after an often costly investment. Yet, most of the literature assumes that uncertain parameters can be observed for free and that the sequence in which they are revealed is independent of the decision-maker's actions. To fill this gap. we consider two- and multi-stage robust optimization problems in which part of the decision variables control the time of information discovery. Thus, information can be discovered (at least in part) by making strategic exploratory investments in previous stages. We propose a novel dynamic formulation of the problem and prove its correctness. We leverage our model to provide a solution method inspired from the K-adaptability approximation. We reformulate the problem as a finite mixed-integer (resp. bilinear) program if none (resp. some of the) decision variables are real-valued. This finite program is solvable with off-the-shelf solvers. We generalize our approach to the minimization of piecewise linear convex functions. We demonstrate the effectiveness of our method in terms of interpretability, optimality, and speed on synthetic instances of the Pandora box problem, the preference elicitation problem, the best box problem, and the R&D project portfolio optimization problem. Finally, we evaluate it on an instance of the active preference elicitation problem used to recommend kidney allocation policies to policy-makers at the United Network for Organ Sharing.

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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