Variance-based sensitivity analysis for time-dependent processes

Variance-based sensitivity analysis for time-dependent processes
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DOI:
10.1016/j.ress.2019.106722
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发表时间:
2020-04-01
影响因子:
8.1
通讯作者:
Smith, Ralph C.
Smith, Ralph C.
中科院分区:
工程技术1区
文献类型:
--
作者:
Alexanderian, Alen;Gremaud, Pierre A.;Smith, Ralph C.

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时变过程的全局敏感性分析需要历史感知的方法。为此,我们开发了一种基于方差的方法,该方法利用所研究问题的相关结构,并采用代理模型来加速计算。将不重要的不确定性参数固定到其标称值所产生的误差通过先验估计进行了分析。我们说明我们的方法上的谐振子的例子和非线性动态霍乱模型。
The global sensitivity analysis of time-dependent processes requires history-aware approaches. We develop for that purpose a variance-based method that leverages the correlation structure of the problems under study and employs surrogate models to accelerate the computations. The errors resulting from fixing unimportant uncertain parameters to their nominal values are analyzed through a priori estimates. We illustrate our approach on a harmonic oscillator example and on a nonlinear dynamic cholera model.