Modeling of biological population problems using the element-free kp-Ritz method

Modeling of biological population problems using the element-free kp-Ritz method
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使用无元素 kp-Ritz 方法对生物种群问题进行建模

DOI:
10.1016/j.amc.2013.11.033
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发表时间:
2014-01
影响因子:
4
通讯作者:
Liew K.M.
Liew K.M.
中科院分区:
数学2区
文献类型:
--
作者:
Cheng R.J.;Zhang L.W.;Liew K.M.

文献摘要

参考文献

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使用无网格 kp-Ritz 方法分析了生物种群空间扩散中产生的简并抛物线方程。采用无网格核粒子估计来近似二维位移场。通过对能量表达式应用 Ritz 最小化过程获得离散方程组。为了验证该方法结果的准确性和稳定性,根据支撑尺寸和节点数量的影响进行了收敛性研究。本文通过数值算例研究了生物种群模型无网格kp-Ritz方法的有效性。本研究结果与现有文献报道的结果进行了比较,发现与文献吻合良好。
A degenerate parabolic equation arising in the spatial diffusion of biological population is analyzed using the mesh-free kp-Ritz method. The mesh-free kernel particle estimate is employed to approximate the 2D displacement field. A system of discrete equations is obtained through application of the Ritz minimization procedure to the energy expressions. To validate the accuracy of the results and stability of the present method, convergence studies were carried out based on influences of support size and number of nodes. Effectiveness of the mesh-free kp-Ritz method for biological population model is investigated by numerical examples in this paper. The present results were compared with results reported in extant literature and were found to be in good agreement with the literature.
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