arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 0708.0281math.OC
收藏

带概率的随机规划

Stochastic Programming with Probability

Laetitia Andrieu, Guy Cohen, Felisa Vázquez-Abad

摘要:

在这项工作中,我们研究的最优化问题的失败约束。这一限制是用导致故障的条件来表示的,代表物理或技术故障。我们制定的问题的概率约束,其中的“信心”的水平是一个建模参数,并解释失败的概率不应超过该水平。随机Arrow-Hurwicz算法的应用提出了两个困难:一个是结构性的,由于缺乏凸性的概率约束,另一个是估计的梯度的概率约束。我们开发了两个梯度估计通过卷积方法和有限差分技术,分别减少偏差,我们提供了一个完整的分析算法的收敛性。收敛结果被用来调整数值算法的参数,以达到最佳的收敛速度,并通过一个金融应用的例子,包括数值结果。

英文摘要:

In this work we study optimization problems subject to a failure constraint. This constraint is expressed in terms of a condition that causes failure, representing a physical or technical breakdown. We formulate the problem in terms of a probability constraint, where the level of "confidence" is a modelling parameter and has the interpretation that the probability of failure should not exceed that level. Application of the stochastic Arrow-Hurwicz algorithm poses two difficulties: one is structural and arises from the lack of convexity of the probability constraint, and the other is the estimation of the gradient of the probability constraint. We develop two gradient estimators with decreasing bias via a convolution method and a finite difference technique, respectively, and we provide a full analysis of convergence of the algorithms. Convergence results are used to tune the parameters of the numerical algorithms in order to achieve best convergence rates, and numerical results are included via an example of application in finance.

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。

↑