نتایج جستجو برای: surface integral equations stratton

تعداد نتایج: 956069  

2017
Anh Le Van Jean Royer

An integral equations method for a three-dimensional crack in a finite or infinite body is achieved by means of Kupradze potentials. Surface and through cracks can be studied according to this approach with only the assumption that the body has a linear, elastic, homogeneous and isotropic behavior. Both singular surface integrals and line integrals appear in the derived equations. For surface a...

2010
V. K. Gupta

Co-plarized of radar backscattering coefficient 0 hh σ and 0 vv σ are estimated for soil surface using a standard theortical model IEM (Integrtion Eequation Model). The surface parameters for model are , dielectric constant and roughness, are determined by experimental technique. The real and imaginary parts ( ε' and ε") of dielectric constant of soil determine by wave guide cell method at a si...

In this paper we are supposed to define the θ−vector field on the n−surface S and then investigate about the existence and uniqueness of its integral curves by the Theory of Ordinary Differential Equations. Then thesubject is followed through some examples.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت دبیر شهید رجایی 1390

دراین پایان نامه نظر به اهمیت معادلات انتگرال ولترای خطی در حل مسائل فیزیک ،مهندسی و ... ، روش های کالوکیشن و کالوکیشن تکراری جهت حل معادلات انتگرال ولترای منفرد ضعیف مورد بررسی قرار می گیرند . سپس در ادامه در موردهمگرایی این روشها مطالب مفیدی بیان خواهد شد . در پایان نتیجه میگیریم که اگر جواب دقیق در برخی از فضاهای مناسب وجود داشته باشد ، با استفاده از این روش یک همگرایی قوی میتواند بوجود بیای...

Journal: :نظریه تقریب و کاربرد های آن 0
احمد شهسواران islamic azad university, boroujerd branch, boroujerd, iran. اکبر شهسواران islamic azad university, boroujerd branch, boroujerd, iran.

in this work, we present a computational method for solving second kindnonlinear fredholm volterra integral equations which is based on the use ofhaar wavelets. these functions together with the collocation method are thenutilized to reduce the fredholm volterra integral equations to the solution ofalgebraic equations. finally, we also give some numerical examples that showsvalidity and applica...

Journal: :journal of mathematical modeling 2013
farshid mirzaee

in this paper, the two-dimensional triangular orthogonal functions (2d-tfs) are applied for solving a class of nonlinear two-dimensional volterra integral equations. 2d-tfs method transforms these integral equations into a system of linear algebraic equations. the high accuracy of this method is verified through a numerical example and comparison of the results with the other numerical methods.

Journal: :CoRR 2017
Utkarsh R. Patel Piero Triverio Sean V. Hum

Full-wave electromagnetic simulations of electrically large arrays of complex antennas and scatterers are challenging, as they consume large amount of memory and require long CPU times. This paper presents a new reduced-order modeling technique to compute scattering and radiation from large arrays of complex scatterers and antennas. In the proposed technique, each element of the array is replac...

2014
Ahmed A. Sakr Ezzeldin A. Soliman Alaa K. Abdelmageed

A volume-surface integral equation (VSIE) formulation is developed for determining the electromagnetic TM scattering by a two-dimensional conducting cylinder coated with an inhomogeneous dielectric/magnetic material. The electric field integral equations (EFIEs) are utilized to derive the VSIE. The surface EFIE is applied to the conducting surface, while the volume EFIE is applied to the coatin...

Journal: :journal of mathematical modeling 0
meisam jozi faculty of sciences, persian gulf university, bushehr, iran saeed karimi faculty of sciences, persian gulf university, bushehr, iran

degenerate kernel approximation method is generalized to solve hammerstein system of fredholm integral equations of the second kind. this method approximates the system of integral equations by constructing degenerate kernel approximations and then the problem is reduced to the solution of a system of algebraic equations. convergence analysis is investigated and on some test problems, the propo...

Journal: :The Journal of the Acoustical Society of America 1988

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