نتایج جستجو برای: maxwells equations

تعداد نتایج: 238697  

Journal: :caspian journal of mathematical sciences 2012
a. gokdogan m. merdan a. yildirim

in this article differential transformation method (dtms) has been used to solve neutral functional-differential equations with proportional delays. the method can simply be applied to many linear and nonlinear problems and is capable of reducing the size of computational work while still providing the series solution with fast convergence rate. exact solutions can also be obtained from the kno...

Journal: :international journal of industrial mathematics 0
r. ketabchi‎ department of mathematics, science and research branch, islamic azad university,tehran,‎iran‎. r. mokhtari department of mathematical sciences, isfahan university of technology, isfahan 84156-83111, ‎iran‎. e. babolian department of mathematics, science and research branch, islamic azad university, tehran, ‎iran.

this paper is concerned with a technique for solving volterra integral equations in the reproducing kernel hilbert space. in contrast with the conventional reproducing kernel method, the gram-schmidt process is omitted here and satisfactory results are obtained.the analytical solution is represented in the form of series.an iterative method is given to obtain the approximate solution.the conver...

Journal: :sahand communications in mathematical analysis 2015
parviz darania jafar ahmadi shali

in this paper, we studied the numerical solution of nonlinear weakly singular volterra-fredholm integral equations by using the product integration method. also, we shall study the convergence behavior of a fully discrete version of a product integration method for numerical solution of the nonlinear volterra-fredholm integral equations. the reliability and efficiency of the proposed scheme are...

Journal: :journal of mathematical modeling 2014
hossein noroozi alireza ansari

in this article, we develop the distributed order fractional hybrid differential equations (dofhdes) with linear perturbations involving the fractional riemann-liouville derivative of order $0 < q < 1$ with respect to a nonnegative density function. furthermore, an existence theorem for the fractional hybrid differential equations of distributed order is proved under the mixed $varphi$-lipschit...

Journal: :journal of sciences, islamic republic of iran 2013
a. tari

in this paper, we apply the differential transform (dt) method for finding approximate solution of the system of linear and nonlinear volterra integro-differential equations with variable coefficients, especially of higher order. we also obtain an error bound for the approximate solution. since, in this method the coefficients of taylor series expansion of solution is obtained by a recurrence r...

Journal: :علوم و تکنولوژی پلیمر 0
مهدی سلامی کلجاهی محمد نجفی وحید حدادی اصل سید مهدی قافله باشی زرند

ethylene was homopolymerized over ziegler-natta catalyst and the homopolymerization was modeled using moment equations. mechanism was modeled according to five different reaction centers of catalyst. for each center, there are different reaction rate coefficients; therefore the final product of each center would be expected to be different. modeling results showed good conformity to the experim...

Journal: :علوم 0
اسماعیل بابلیان esmaeil babolian دانشگاه علیرضا وحیدی ar vahidi دانشگاه خوارزمی

in this paper, we conduct a comparative study between the homotopy perturbation method (hpm) and adomian’s decomposition method (adm) for analytic treatment of nonlinear volterra integral equations, and we show that the hpm with a specific convex homotopy is equivalent to the adm for these type of equations.

Journal: :bulletin of the iranian mathematical society 0
s. ‎ahdiaghdam faculty of mathematical sciences‎, ‎university of tabriz‎, ‎tabriz‎, ‎iran. k. ‎ivaz faculty of mathematical sciences‎, ‎university of tabriz‎, ‎tabriz‎, ‎iran. s. ‎shahmorad faculty of mathematical sciences‎, ‎university of tabriz‎, ‎tabriz‎, ‎iran.

‎we study dual integral equations which appear in formulation of the‎ ‎potential distribution of an electrified plate with mixed boundary‎ ‎conditions‎. ‎these equations will be converted to a system of‎ ‎singular integral equations with cauchy type kernels‎. ‎using‎ ‎chebyshev polynomials‎, ‎we propose a method to approximate the‎ ‎solution of cauchy type singular integral equation which will ...

Journal: :journal of computational & applied research in mechanical engineering (jcarme) 2012
zuliang lu*

in this paper, a positive definite semi-discrete mixed finite element method was presented for two-dimensional parabolic equations. in the new positive definite systems, the gradient equation and flux equations were separated from their scalar unknown equations.  also, the existence and uniqueness of the semi-discrete mixed finite element solutions were proven. error estimates were also obtaine...

Journal: :نظریه تقریب و کاربرد های آن 0
m. ghasemi department of applied mathematics, faculty of science, shahrekord university, shahrekord, p. o. box 115, iran. a. azizi department of mathematics, sanandaj branch, islamic azad university, sanandaj, iran. m. fardi department of mathematics, islamic azad university, boroujen branch, boroujen, iran.

in this paper, an application of homotopy perturbation method is appliedto nding the solutions of the seven-order sawada-kotera (ssk) and a lax&apos;sseven-order kdv (lskdv) equations. then obtain the exact solitary-wave so-lutions and numerical solutions of the ssk and lskdv equations for the initialconditions. the numerical solutions are compared with the known analyticalsolutions. their rem...

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