نتایج جستجو برای: di fferential equations

تعداد نتایج: 491803  

Journal: :نظریه تقریب و کاربرد های آن 0
h. rouhparvar department of mathematics, college of technical and engineering, saveh branch, islamic azad university, saveh, iran

in this paper, the reduced di erential transform method is investigated fora nonlinear partial di erential equation modeling nematic liquid crystals, itis called the hunter-saxton equation. the main advantage of this methodis that it can be applied directly to nonlinear di erential equations withoutrequiring linearization, discretization, or perturbation. it is a semi analytical-numerical metho...

Journal: :journal of linear and topological algebra (jlta) 0
z kalateh bojdi department of mathematics, birjand university, birjand, iran; s ahmadi-asl department of mathematics, birjand university, birjand, iran; a aminataei faculty of mathematics, k. n. toosi university of technology, p.o. box 16315-1618, tehran, iran.

in this paper, a new and ecient approach is applied for numerical approximationof the linear di erential equations with variable coecients based on operational matriceswith respect to hermite polynomials. explicit formulae which express the hermite expansioncoecients for the moments of derivatives of any di erentiable function in terms of theoriginal expansion coecients of the function itse...

Journal: :journal of linear and topological algebra (jlta) 0
s. p mondal department of mathematics, national institute of technology, agartala, jirania-799046, tripura, india t. k roy department of mathematics, indian institute of engineering science and technology, shibpur, howrah-711103, west bengal, india

in this paper the solution of a second order linear di erential equations with intu-itionistic fuzzy boundary value is described. it is discussed for two di erent cases: coecientis positive crisp number and coecient is negative crisp number. here fuzzy numbers aretaken as generalized trapezoidal intutionistic fuzzy numbers (gtrifns). further a numericalexample is illustrated.

Journal: :international journal of industrial mathematics 2014
a. armand z. gouyandeh

this paper presents a comparison between variational iteration method (vim) and modfied variational iteration method (mvim) for approximate solution a system of volterra integral equation of the first kind. we convert a system of volterra integral equations to a system of volterra integro-di®erential equations that use vim and mvim to approximate solution of this system and hence obtain an appr...

Journal: :نظریه تقریب و کاربرد های آن 0
m khanian department of mathematics, khorasgan (isfahan) branch, islamic azad university, isfahan, iran. a. davari department of mathematics, faculty of sciences, university of isfahan, isfahan, iran.

image restoration has been an active research area. di erent formulations are e ective in high qualityrecovery. partial di erential equations (pdes) have become an important tool in image processingand analysis. one of the earliest models based on pdes is perona-malik model that is a kindof anisotropic di usion (andi) lter. anisotropic di usion lter has become a valuable tool indi erent elds...

A. Armand, Z. Gouyandeh

This paper presents a comparison between variational iteration method (VIM) and modfied variational iteration method (MVIM) for approximate solution a system of Volterra integral equation of the first kind. We convert a system of Volterra integral equations to a system of Volterra integro-di®erential equations that use VIM and MVIM to approximate solution of this system and hence obtain an appr...

2012
Stephen Lucas

Since the advent of Taylor Series, polynomial methods have been used to solve di↵erential equations and learn the properties of di↵erential equations. There are many polynomial methods for solving di↵erential equations and understanding dynamical systems. For example, Taylor polynomials, Chebyshev Polynomials and Adomian Polynomials are used to generate approximate solutions. Automatic di↵erent...

Journal: :journal of mahani mathematical research center 0
h. saeedi department of mathematics, sahid bahonar university of kerman, iran, 76169-14111.

a novel and e ective method based on haar wavelets and block pulse functions(bpfs) is proposed to solve nonlinear fredholm integro-di erential equations of fractional order.the operational matrix of haar wavelets via bpfs is derived and together with haar waveletoperational matrix of fractional integration are used to transform the mentioned equation to asystem of algebraic equations. our new m...

Journal: :international journal of industrial mathematics 0
m. mosleh department of mathematics, firoozkooh branch, islamic azad university, firoozkooh, iran.

in this paper, we interpret a fuzzy differential equation by using the strongly generalized differentiability concept. utilizing the generalized characterization theorem. then a novel hybrid method based on learning algorithm of fuzzy neural network for the solution of differential equation with fuzzy initial value is presented. here neural network is considered as a part of large eld called n...

1999
Paul S. Heckbert

In a di erential equations course, one typically studies a few classes of problems for which there are closed form solutions, such as ordinary, linear di erential equations with constant coe cients. Most problems of interest in real world simulation problems are much more complex, however, involving domains of two or more dimensions or nonlinear e ects, yielding partial di erential equations or...

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