نتایج جستجو برای: systems of integral equations

تعداد نتایج: 21304684  

A numerical method for solving nonlinear Fredholm-Volterra integral equations of general type is presented. This method is based on replacement of unknown function by truncated series of well known Chebyshev expansion of functions. The quadrature formulas which we use to calculate integral terms have been imated by Fast Fourier Transform (FFT). This is a grate advantage of this method which has...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان 1371

the effect of the presence of perforations on he stresses of a plate is a problem which is of great interest in structural design and in the mathemattical theory of elasticity. among the many hole patterns that are likely to require consideration is the ring of equally spaced circular holes. the present worke investigates stress & strain analysis of a thin isotropic circular plate containing a ...

Journal: :international journal of mathematical modelling and computations 0
m. nouri department of mathematics, south tehran branch, islamic azad university, tehran, iran k. maleknejad department of mathematics, iran university of science and technology, narmak, tehran, iran

this article proposes a direct method for solving three types of integral equations with time delay. by using operational matrix of integration, integral equations can be reduced to a linear lower triangular system which can be directly solved by forward substitution. numerical examples shows that the proposed scheme have a suitable degree of accuracy.

Journal: :sahand communications in mathematical analysis 0
hassan kamil jassim department of mathematics, faculty of education for pure sciences, university of thi-qar, nasiriyah, iraq.

in this paper, we apply the local fractional laplace transform method (or yang-laplace transform) on volterra integro-differential equations of the second kind within the local fractional integral operators to obtain the analytical approximate solutions. the iteration procedure is based on local fractional derivative operators. this approach provides us with a convenient way to find a solution ...

Journal: :journal of optoelectronical nano structures 0
masoud rezvani 1department of physics, malayer university, malayer, iran. maryam fathi sepahvand 1department of physics, malayer university, malayer, iran.

in this paper, scattering of a plane and monochromatic electromagnetic wave from a nano-wire is simulated using surface integral equations. first, integral equationsgoverning unknown fields on the surface is obtained based on stratton-cho surface integral equations. then, the interaction of the wave with a non-plasmonic as well as a palsmonic nano-wire is considered. it is shown that in scatter...

Journal: :نظریه تقریب و کاربرد های آن 0
m. tavassoli-kajani department of mathematics, islamic azad university, khorasgan branch, isfahan, iran. l. kargaran-dehkordi department of mechanic, shahr-e-kord university, shahr-e-kord, iran. sh. hadian-jazi department of mechanic, shahr-e-kord university, shahr-e-kord, iran.

this paper proposes a three-step method for solving nonlinear volterra integralequations system. the proposed method convents the system to a (3 × 3)nonlinear block system and then by solving this nonlinear system we ndapproximate solution of nonlinear volterra integral equations system. to showthe advantages of our method some numerical examples are presented.

Journal: :journal of linear and topological algebra (jlta) 0
r firouzdor department of mathematics, islamic azad university and young researcher club, central tehran branch, central tehran branch a heidarnejad khoob department of mathematics, islamic azad university z mollaramezani department of mathematics, payameh noor university, new city hashgerd, hashgerd, iran

this paper describes an approximating solution, based on lagrange interpolation and spline functions, to treat functional integral equations of fredholm type and volterra type. this method can be extended to functional di erential and integro-di erential equations. for showing eciency of the method we give some numerical examples.

2008
S. A. Belbas

The classical theory of optimal control deals with systems governed by ordinary differential equations or, in the case of discrete-time systems, finite difference equations. That basic theory has been extended in many directions: for example, we may have ssystems governed by partial differential equations, systems governed by sets of inequalities that involve partial derivatives, continuous-tim...

Journal: :Int. J. Math. Mathematical Sciences 2004
E. G. Ladopoulos G. Tsamasphyros V. A. Zisis

Some new approximation methods are proposed for the numerical evaluation of the finitepart singular integral equations defined on Hilbert spaces when their singularity consists of a homeomorphism of the integration interval, which is a unit circle, on itself. Therefore, some existence theorems are proved for the solutions of the finite-part singular integral equations, approximated by several s...

A. Fazli, Sh. Javadi

In this paper, to solve a linear one-dimensional Volterra  integral equation of the second kind. For this purpose using the equation form, we have defined a linear transformation and by using it's conjugate and reproducing kernel functions, we obtain a basis for the functions space.Then we obtain the solution of  integral equation in terms of the basis functions. The examples presented in this ...

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