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arXiv 2011.06052math.OCmath.PRstat.CO
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稀有机会约束下的Optimization

Optimization under rare chance constraints

Shanyin Tong, Anirudh Subramanyam, Vishwas Rao

摘要:

机会约束提供了一个原则性框架,通过修改系统的可控属性来减轻高影响极端事件的风险。然而,这种事件的低概率和罕见发生,对经典解方法施加了严格的采样和计算要求,使得它们不切实际。本文提出了一种新的免采样方法来求解受一般高斯混合分布不确定性影响的机会约束最优化问题。通过将现代大偏差理论的发展与凸分析和双层优化的工具相结合,我们提出了易于处理的公式,可以通过现成的求解器来解决。我们的配方享有几个优势相比,经典的方法:它们的大小和复杂性是独立的事件的稀有性,它们不需要线性或凸性假设的系统约束,并在易于验证的条件下,作为安全的保守近似或渐近精确的真正问题的重新制定。在投资组合管理、结构工程和流体动力学中的线性、非线性和偏微分方程约束问题上的计算实验表明,该方法具有广泛的适用性,在精度和效率方面优于经典的基于采样的方法。

英文摘要:

Chance constraints provide a principled framework to mitigate the risk of high-impact extreme events by modifying the controllable properties of a system. The low probability and rare occurrence of such events, however, impose severe sampling and computational requirements on classical solution methods that render them impractical. This work proposes a novel sampling-free method for solving rare chance constrained optimization problems affected by uncertainties that follow general Gaussian mixture distributions. By integrating modern developments in large deviation theory with tools from convex analysis and bilevel optimization, we propose tractable formulations that can be solved by off-the-shelf solvers. Our formulations enjoy several advantages compared to classical methods: their size and complexity is independent of event rarity, they do not require linearity or convexity assumptions on system constraints, and under easily verifiable conditions, serve as safe conservative approximations or asymptotically exact reformulations of the true problem. Computational experiments on linear, nonlinear and PDE-constrained problems from applications in portfolio management, structural engineering and fluid dynamics illustrate the broad applicability of our method and its advantages over classical sampling-based approaches in terms of both accuracy and efficiency.

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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