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arXiv 2101.05958math.OCcs.LG
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用于最优设计的二进制Optimization随机学习方法

Stochastic Learning Approach to Binary Optimization for Optimal Design of Experiments

Argonne National Laboratory(阿贡国家实验室)

Ahmed Attia, Sven Leyffer, Todd Munson

摘要:

针对由数学模型如偏微分方程控制的贝叶斯反问题,提出了一种新的随机二进制优化方法,用于最优试验设计(OED). OED效用函数,即正则化的最优性准则,被铸造成一个随机目标函数的形式在多元伯努利分布的期望。然后通过使用随机最优化例程来求解概率目标以找到最优观测策略。所提出的方法进行了分析,从优化的角度来看,也从机器学习的角度与对应的政策梯度强化学习。该方法是通过使用一个理想化的二维贝叶斯线性逆问题,并验证了广泛的数值实验进行传感器的位置在参数识别设置的数值模拟。

英文摘要:

We present a novel stochastic approach to binary optimization for optimal experimental design (OED) for Bayesian inverse problems governed by mathematical models such as partial differential equations. The OED utility function, namely, the regularized optimality criterion, is cast into a stochastic objective function in the form of an expectation over a multivariate Bernoulli distribution. The probabilistic objective is then solved by using a stochastic optimization routine to find an optimal observational policy. The proposed approach is analyzed from an optimization perspective and also from a machine learning perspective with correspondence to policy gradient reinforcement learning. The approach is demonstrated numerically by using an idealized two-dimensional Bayesian linear inverse problem, and validated by extensive numerical experiments carried out for sensor placement in a parameter identification setup.

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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