نتایج جستجو برای: finite difference

تعداد نتایج: 656646  

Journal: :J. Nonlinear Science 2011
Martin Hairer Jochen Voss

This article is devoted to the numerical study of various finite difference approximations to the stochastic Burgers equation. Of particular interest in the one-dimensional case is the situation where the driving noise is white both in space and in time. We demonstrate that in this case, different finite difference schemes converge to different limiting processes as the mesh size tends to zero....

پایان نامه :دانشگاه بین المللی امام خمینی (ره) - قزوین - دانشکده فنی 1390

در این پایان نامه یک نوع آنتن ویوالدی آنتیپودال متقارن مورد تحلیل، طراحی و شبیه سازی قرار گرفته شده است و نتایج آن از جمله گین ، تلفات برگشتی و قطبی شدگی متقاطع و در نهایت پترن آن در رنج فرکانس 1 تا 20 گیگاهرتز ارائه گردیده است. ابتدا انواع آنتن ویوالدی و روند سیر تکامل آن مورد بررسی قرار گرفته و با توجه به مزایا و کاربردهای آن،یک نوع آنتن ویوالدی دو طرفه متقارن انتخاب شده و مورد تحلیل و بررسی...

2014
Zhen Tian Wenbo Jin Lei Wang Zhi Jin

Taking the axial heat conduction of wax deposition layer into account, a two-dimensional heat transfer model of calculating the temperature profile inside wax deposition layer was deduced and established based on the energy balance equation, the finite difference method was used to solve this model, and the influence of axial heat conduction on the distribution law of temperature profile inside...

2006
Emma Hoarau

A Mathematica based program has been elaborated in order to determine the symmetry group of a finite difference equation. The package provides functions which enable us to solve the determining equations of the related Lie group.

Journal: :Kybernetika 2007
Tomás Oberhuber

In this article we discuss numerical scheme for the approximation of the Willmore flow of graphs. The scheme is based on the finite difference method. We improve the scheme we presented in [8, 7] which is based on combination of the forward and the backward finite differences. The new scheme approximates the Willmore flow by the central differences and as a result it better preserves symmetry o...

Journal: :J. Computational Applied Mathematics 2011
Jing Gong Jan Nordström

We investigate several existing interface procedures for finite difference methods applied to advection-diffusion problems. The accuracy, stiffness and reflecting properties of the various interface procedures are investigated. The analysis and numerical experiments show that there are only minor differences between the various methods once a proper parameter choice has been made.

Journal: :I. J. Bifurcation and Chaos 2012
Changpin Li Fanhai Zeng

In this review paper, the finite difference methods (FDMs) for the fractional differential equations are displayed. The considered equations mainly include the fractional kinetic equations of diffusion or dispersion with time, space and time-space derivatives. In some way, these numerical methods have similar form as the case for classical equations, some of which can be seen as the generalizat...

2004
Marta Martínez Vázquez Rens Baggen

To characterise the reflection properties of printed surfaces like FSS (Frequency Selective Surfaces) and EBG (Electromagnetic Band-Gap), it is standard to use a plane wave excitation, and then compare the phase of the incident and the reflected waves. Thus, the phase difference over the frequency can be obtained. Nevertheless, in most cases, only infinite size structures are considered. In thi...

2014
Ali Ghods Mahyar Mir

This paper presents an investigation into the performance evaluation of Finite Difference (FD) method in modeling a rectangular thin plate structure. In case of complex and big construction systems subjected to the arbitrary loads, including a complex boundary conditions, solving of differential equations by analytical methods is almost impossible. Then the solution is application of numerical ...

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