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一类非线性单调型方程的区域分裂法 总被引:1,自引:0,他引:1
本文考虑了一类非线性单调问题的加性Schwgrz交替法和异步平行算法,并得到了在能量模意义下的收敛性结果,最后还讨论了格式的有限元离散。 相似文献
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障碍问题的区域分裂法 总被引:4,自引:1,他引:3
区域分裂法是近年来为适应平行机计算而新崛起的偏微分方程数值解法,它的基本思想就是将一大型问题转化为一系列小型计算问题的求解过程。本文将讨论下列障碍问题的区域分裂法: 相似文献
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Non-Noether conserved quantity constructed by using form invariance for Birkhoffian system 总被引:6,自引:0,他引:6 下载免费PDF全文
Based on the invariance of Birkhoffian equations under the infinitesimal transformations of groups, the definition and the criterion of a form invariance for a Birkhoffian system are established. The condition under which the form invariance can lead to a non-Noether conserved quantity and the form of the conserved quantity are deduced by relyingon the total time derivative along the trajectory of the equations, and two corollaries in special cases are presented. An example is finally given to illustrate the application of the results. 相似文献
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1.引言设 是Rd(d=2;3)中的有界多角形区域,α是它的边界.考虑下列模型问题此处f∈EL2(Ω),系数AE(C1(Ω))d×d满足下列一致椭园条件此处α0是正常数.此外假设B∈(C1(Ω)d和c∈C0(Ω)([14]).(1.1)式的变分形式是:找u∈H0(Ω)使得最近,非对称不定问题的非协调多重网格法吸引了众多的研究,详见问,[7];[10].考虑非协调元多重网格的一个重要原因是混合元和非协调元之间存在着紧密的联系(详见【几问,问).设FI是fi拟一致的H角形或矩形剖分,是由连接F'-'(… 相似文献
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SymmetryReductionsoftheCombinedKdV-mKdVEquationZhangJiefang(张解放);XuXuejun(许学军);ChengDesheng(程德声)(DepartmentofPhysics,Zhejiang... 相似文献
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本文通过所谓的速度-压力型公式讨论了Navier-Stokes方程的变网格非协调有限元逼近,得到了在确定模意义下的速度、压力误差估计,且在一定条件下,某些误差估计能达到最优。 相似文献
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In this paper, an optimal V-cycle multigrid method for some conforming and nonconforming plate elements are constructed. A new method dealing with nonnested multigrid methods is presented. 相似文献
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In this paper,the two level additive Schwarz algorithm of mixed finite element.dts-cretization of Inharmonic problem is presented,the rate of convergenece is obtained.Moreover,the two level multiplicative Schwarz algorithm is considered. 相似文献
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