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  • 學位論文

雙曲問題的多尺度方法

Multiscale method for hyperbolic problems

指導教授 : 薛克民
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摘要


本文中,我們將發展雙曲問題的多尺度方法。我們的方法建立在 HMM 的架構上。HMM 的架構是在 [Commun. Math. Sci. 1 (1) 87] 所提出的。該架構包含兩部分 :微尺度上的問題(原方程度)和宏觀問題。藉由解宏觀問題,我們所需的計算時間將比直接解原問題,要少得多。除了方法的描述外,我們也呈現一些數值的結果,以及誤差的分析。

關鍵字

多尺度 HMM 數值方法 雙曲問題 守恆律

並列摘要


In this thesis, we design a numerical method to solve multiscale hyperbolic problems. This method is based on the framework HMM, introduced in [Commun. Math. Sci. 1 (1) 87]. The HMM framework contains two main components: microscopic problem (orginal equation) and macroscopic problem. By solving the macroscopic probem, our cost is much lower than solving the original equation directly. We describe the details of the HMM method and present some numerical results. Finally, we analyze the errors of the HMM method.

參考文獻


[1] B. Engquist, H., Holst and O. Runborg, Multi-scale methods for wave propaga-
[2] W. E and B. Engquist, The heterogeneous multi-scale methods, Commun. Math.
[3] A. Abdulle and W. E, Finite di erence heterogeneous multi-scale method for
[4] B. Engquist and Y. H. Tsai, Heterogeneous multiscale methods for sti ordinary
[5] R. J. Leveque, Finite volume methods for hyperbolic problems, Cambridge Uni-

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