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首页> 外文期刊>Discrete and Continuous Dynamical Systems,Series S >NUMERICAL ANALYSIS OF AN ODE AND A LEVEL SET METHODS FOR EVOLVING SPIRALS BY CRYSTALLINE EIKONAL-CURVATURE FLOW
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NUMERICAL ANALYSIS OF AN ODE AND A LEVEL SET METHODS FOR EVOLVING SPIRALS BY CRYSTALLINE EIKONAL-CURVATURE FLOW

机译:通过晶体尖曲曲率流动的颂歌和水平设定方法的数值分析

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In this paper, the evolution of a polygonal spiral curve by the crystallinecurvature ow with a pinned center is considered from two viewpoints;a discrete model consisting of an ODE system describing facet lengths andanother using level set method. We investigate the difference of these modelsnumerically by calculating the area of an interposed region by their spiralcurves. The area difference is calculated by the normalized L~1 norm of thedifference of step-like functions which are branches of arg(x) whose discontinuitiesare on the spirals. We find that the differences in the numerical resultsare small, even though the model equations around the center and the farthestfacet are slightly different.
机译:在本文中,结晶多边形螺旋曲线的演变曲率从两个观点考虑了与固定中心的oW;由描述方面长度和的ode系统组成的离散模型另一个使用级别集方法。我们调查这些模型的差异通过通过螺旋计算插入区域的区域来数量曲线。区域差异由标准化的L〜1规范计算阶梯式函数的差异是arg(x)的分支,其不连续性在螺旋上。我们发现数值结果的差异很小,即使中心围绕中心和最远的模型方程面部略有不同。

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