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A meshless scheme for partial differential equations based on multiquadric trigonometric B-spline quasi-interpolation |
Gao Wen-Wu (高文武)a b, Wang Zhi-Gang (王志刚)c |
a School of Economics, Anhui University, Hefei 230411, China;
b Shanghai Key Laboratory for Contemporary Applied Mathematics, School of Mathematical Sciences, Fudan University, Shanghai 200433, China;
c School of Mathematics and Finance, Fuyang Teachers College, Fuyang 236037, China |
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Abstract Based on the multiquadric trigonometric B-spline quasi-interpolant, this paper proposes a meshless scheme for some partial differential equations whose solutions are periodic with respect to the spatial variable. This scheme takes into account the periodicity of the analytic solution by using derivatives of a periodic quasi-interpolant (multiquadric trigonometric B-spline quasi-interpolant) to approximate the spatial derivatives of the equations. Thus, it overcomes the difficulties of the previous schemes based on quasi-interpolation (requiring some additional boundary conditions and yielding unwanted high-order discontinuous points at the boundaries in the spatial domain). Moreover, the scheme also overcomes the difficulty of the meshless collocation methods (i.e., yielding a notorious ill-conditioned linear system of equations for large collocation points). The numerical examples that are presented at the end of the paper show that the scheme provides excellent approximations to the analytic solutions.
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Received: 08 April 2014
Revised: 14 May 2014
Accepted manuscript online:
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PACS:
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02.60.-x
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(Numerical approximation and analysis)
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Fund: Project supported by the Shanghai Guidance of Science and Technology, China (Grant No. 12DZ2272800), the Natural Science Foundation of Education Department of Anhui Province, China (Grant No. KJ2013B203), and the Foundation of Introducing Leaders of Science and Technology of Anhui University, China (Grant No. J10117700057). |
Corresponding Authors:
Wang Zhi-Gang
E-mail: zgw_1122@163.com
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Cite this article:
Gao Wen-Wu (高文武), Wang Zhi-Gang (王志刚) A meshless scheme for partial differential equations based on multiquadric trigonometric B-spline quasi-interpolation 2014 Chin. Phys. B 23 110207
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