PDE acceleration: a convergence rate analysis and applications to obstacle problems
PDE acceleration: a convergence rate analysis and applications to obstacle problems
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PDE 加速:收敛速度分析及其在障碍问题中的应用
DOI:
10.1007/s40687-019-0197-x
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发表时间:
2019
影响因子:
1.2
通讯作者:
Yezzi, Anthony
中科院分区:
文献类型:
--
作者:
Calder, Jeff;Yezzi, Anthony
This paper provides a rigorous convergence rate and complexity analysis for a recently introduced framework, calledPDE acceleration, for solving problems in the calculus of variations and explores applications to obstacle problems. PDE acceleration grew out of a variational interpretation of momentum methods, such as Nesterov’s accelerated gradient method and Polyak’s heavy ball method, that views acceleration methods as equations of motion for a generalized Lagrangian action. Its application to convex variational problems yields equations of motion in the form of a damped nonlinear wave equation rather than nonlinear diffusion arising from gradient descent. Theseaccelerated PDEscan be efficiently solved with simple explicit finite difference schemes where acceleration is realized by an improvement in the CFL condition fromfor diffusion equations tofor wave equations. In this paper, we prove a linear convergence rate for PDE acceleration for strongly convex problems, provide a complexity analysis of the discrete scheme, and show how to optimally select the damping parameter for linear problems. We then apply PDE acceleration to solve minimal surface obstacle problems, including double obstacles with forcing, and stochastic homogenization problems with obstacles, obtaining state-of-the-art computational results.
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影响因子:
3.1
作者:
M. Hintermüller;V. A. Kovtunenko;K. Kunisch
通讯作者:
K. Kunisch
DOI:
--
发表时间:
1992
期刊:
影响因子:
--
作者:
Claes Johnson
通讯作者:
Claes Johnson
影响因子:
2.5
作者:
H. Brezis;M. Sibony
通讯作者:
M. Sibony
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
J. Ball
通讯作者:
J. Ball
影响因子:
2
作者:
Benyamin M;Calder J;Sundaramoorthi G;Yezzi A
通讯作者:
Yezzi A