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arXiv 1712.01403math.NAcs.NA
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一种用于对流扩散PDE分布式控制的超收敛HDG方法

A Superconvergent HDG Method for Distributed Control of Convection Diffusion PDEs

Oklahoma State University(俄克拉荷马州立大学);University of Minnesota(明尼苏达大学);Missouri University of Science and Technology(密苏里科技大学);Sichuan University(四川大学)

Weiwei Hu, Jiguang Shen, John R. Singler, Yangwen Zhang, Xiaobo Zheng

AI总结:

本文提出了一种用于对流扩散PDE分布式最优控制问题的超收敛HDG方法,通过使用高阶多项式逼近状态、共轭状态及其通量,并证明了当k>0时所有变量的最优先验误差估计,同时当k≥1时,该方法在全局耦合未知数的自由度数量上实现了状态、共轭状态和控制的超收敛。

摘要:

我们考虑由椭圆对流扩散PDE支配的分布式最优控制问题,并提出了一种混合型不连续Galerkin(HDG)方法来近似解。我们使用次数为k+1和k≥0的多项式分别近似状态、共轭状态及其通量。此外,我们使用次数为k的多项式近似状态和共轭状态在面上的数值迹,这些是唯一的全局耦合未知数。我们证明了当k>0时,所有变量的最优先验误差估计。此外,从全局耦合未知数的自由度数量角度来看,当k≥1时,该方法实现了状态、共轭状态和控制的超收敛。我们通过数值实验来说明我们的收敛结果。

英文摘要:

We consider a distributed optimal control problem governed by an elliptic convection diffusion PDE, and propose a hybridizable discontinuous Galerkin (HDG) method to approximate the solution. We use polynomials of degree $k+1$ and $k \ge 0$ to approximate the state, dual state, and their fluxes, respectively. Moreover, we use polynomials of degree $k$ to approximate the numerical traces of the state and dual state on the faces, which are the only globally coupled unknowns. We prove optimal a priori error estimates for all variables when $ k > 0 $. Furthermore, from the point of view of the number of degrees of freedom of the globally coupled unknowns, this method achieves superconvergence for the state, dual state, and control when $k\geq 1$. We illustrate our convergence results with numerical experiments.

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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