arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.05796stat.COstat.OT
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用高斯过程回归显式估计数据和微分方程的导数

Explicit Estimation of Derivatives from Data and Differential Equations by Gaussian Process Regression

Hongqiao Wang, Xiang Zhou

摘要:

在这项工作中,我们采用的贝叶斯推断框架来解决的问题,估计的解决方案,特别是其衍生物,满足一个已知的微分方程,从给定的噪音和稀缺的观测的解决方案的数据。为了解决导数估计的准确性和鲁棒性的关键问题,我们使用高斯过程来联合建模的解决方案,导数和微分方程。将线性微分方程视为线性约束,提出了一种带约束的高斯过程回归方法(GPRC),以提高导数的预测精度。对于非线性微分方程,我们提出了一个Picard迭代近似的线性化周围的高斯过程只得到的数据,使我们的GPRC仍然可以迭代适用。此外,采用专家乘积法确保初始或边界条件被考虑,以进一步提高导数的预测精度。我们提出了几个数值结果来说明我们的新方法相比,标准的数据驱动的高斯过程回归的优势。

英文摘要:

In this work, we employ the Bayesian inference framework to solve the problem of estimating the solution and particularly, its derivatives, which satisfy a known differential equation, from the given noisy and scarce observations of the solution data only. To address the key issue of accuracy and robustness of derivative estimation, we use the Gaussian processes to jointly model the solution, the derivatives, and the differential equation. By regarding the linear differential equation as a linear constraint, a Gaussian process regression with constraint method (GPRC) is developed to improve the accuracy of prediction of derivatives. For nonlinear differential equations, we propose a Picard-iteration-like approximation of linearization around the Gaussian process obtained only from data so that our GPRC can be still iteratively applicable. Besides, a product of experts method is applied to ensure the initial or boundary condition is considered to further enhance the prediction accuracy of the derivatives. We present several numerical results to illustrate the advantages of our new method in comparison to the standard data-driven Gaussian process regression.

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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