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arXiv 0804.0864math.NAcs.NAmath.AP
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偏微分方程的稀疏近似解

Sparse Approximate Solution of Partial Differential Equations

TU Berlin(柏林工业大学);Zuse Institute Berlin(齐泽研究所柏林)

Sadegh Jokar, Volker Mehrmann, Marc Pfetsch, Harry Yserentant

AI总结:

针对具有稀疏表示解的偏微分方程,提出一种基于压缩感知的自适应有限元离散方法,通过线性规划求解稀疏近似并递归细化网格,实现误差可控。

摘要:

针对具有稀疏表示解的偏微分方程,引入了一种新的自适应有限元离散概念。受近期压缩感知研究的启发,提出了一种递归网格细化过程,该过程使用线性规划在给定细化水平上找到稀疏解的良好近似。然后,仅对属于大展开系数的网格部分进行细化。给出了该过程的误差估计,并通过一些简单的椭圆模型问题展示了该过程的行为。

英文摘要:

A new concept is introduced for the adaptive finite element discretization of partial differential equations that have a sparsely representable solution. Motivated by recent work on compressed sensing, a recursive mesh refinement procedure is presented that uses linear programming to find a good approximation to the sparse solution on a given refinement level. Then only those parts of the mesh are refined that belong to large expansion coefficients. Error estimates for this procedure are refined and the behavior of the procedure is demonstrated via some simple elliptic model problems.

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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