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Coupling of Point Collocation Meshfree Method and FEM for EEG Forward Solver

机译:eEG转发求解器的点搭配网格法和FEM的耦合

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For solving electroencephalographic forward problem, coupled method of finite element method (FEM) and fast moving least square reproducing kernel method (FMLSRKM) which is a kind of meshfree method is proposed. Current source modeling for FEM is complicated, so source region is analyzed using meshfree method. First order of shape function is used for FEM and second order for FMLSRKM because FMLSRKM adopts point collocation scheme. Suggested method is tested using simple equation using 1-, 2-, and 3-dimensional models, and error tendency according to node distance is studied. In addition, electroencephalographic forward problem is solved using spherical head model. Proposed hybrid method can produce well-approximated solution.
机译:为了求解脑电前向问题,提出了有限元方法(FEM)和快速移动最小二乘再现核法(FMLSRKM)的耦合方法是一种网眼方法。有限元的电流源模拟复杂,所以使用网格法分析源区域。 FMLSRKM的第一阶形状函数用于FEM和秒顺序,因为FMLSRKM采用点搭配方案。使用1-,2-和三维模型使用简单方程来测试建议的方法,研究了根据节点距离的误差趋势。此外,使用球形头模型解决了脑电图前部问题。提出的混合方法可以产生良好的近似的解决方案。

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