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论文类型：期刊论文

发表时间：2019-09-15

发表刊物：COMPUTERS & MATHEMATICS WITH APPLICATIONS

收录刊物：EI、SCIE

卷号：78

期号：6

页面范围：2052-2062

ISSN号：0898-1221

关键字：Modified Laplace variational iteration method; Homotopy perturbation method; Lagrange multipliers; Fourth order parabolic PDEqs

摘要：In the present study, a new amendment in Laplace variational iteration method for the solution of fourth-order parabolic partial differential equations with variable coefficients is revealed i.e. modified Laplace variational iteration method (ML-VIM). The proposed modification is made by coupling of two methods: one of them is variational iteration method (VIM) and the other one is Laplace transformation (LT). Our modification has an important beauty that one has no need to compute Lagrange multiplier via integration nor by taking convolution theorem and has a simple way to use in the implementation of our proposed scheme. Moreover, homotopy perturbation method (HPM) with He's polynomials is employed for the computation of nonlinear terms. The main improvement of our proposed scheme is the reduction of the problem to a simple one, which also embraces for solving a nonlinear term. Some illustrated examples are interpreted which unveil the robustness and accuracy of the newly developed scheme. (C) 2019 Elsevier Ltd. All rights reserved.