فهرس المقالات Boundary Value Problem

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  1 - تعمیم نظریة استورم-لیوویل برای عملگر بسلِ کسری
  سیدسیف‌اله موسی‌زاده
  در این مقاله، ‏نظریۀ طیفی را برای مقادیر ویژه و توابع ویژۀ یک مسألۀ مقدار مرزی شامل عملگر خطیِ بسلِ کسری ارائه می‌کنیم. بعلاوه ما نشان می‌دهیم که این عملگر، خودالحاقی است‏، مقادیر ویژۀ مسألۀ مقدار مرزی حقیقی هستند و توابع ویژۀ متناظرشان متعامدند.

  در این مقاله، ‏نظریۀ طیفی را برای مقادیر ویژه و توابع ویژۀ یک مسألۀ مقدار مرزی شامل عملگر خطیِ بسلِ کسری ارائه می‌کنیم. بعلاوه ما نشان می‌دهیم که این عملگر، خودالحاقی است‏، مقادیر ویژۀ مسألۀ مقدار مرزی حقیقی هستند و توابع ویژۀ متناظرشان متعامدند. تفاصيل المقالة
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  2 - روش لاگرانژ بهبود یافته برای حل دستگاه معادلات قدرمطلق و کاربرد آن در مسایل مقدار مرزی دونقطه ای
  حسین موسائی سعید کتابچی محمدتقی فولادی
  یکی از موضوعاتی که در سالهای اخیر مورد توجه پژوهشگران قرار گرفته بررسی دستگاه معادلات قدرمطلق می باشد. دستگاه معادلات قدرمطلق به دلیل این در آن مسایل مکمل خطی و همچنین برنامه ریزی خطی و برنامه ریزی درجه دوم محدب گنجانده شده است در بهینه سازی دارای اهمیت می باشد. این مقا أکثر

  یکی از موضوعاتی که در سالهای اخیر مورد توجه پژوهشگران قرار گرفته بررسی دستگاه معادلات قدرمطلق می باشد. دستگاه معادلات قدرمطلق به دلیل این در آن مسایل مکمل خطی و همچنین برنامه ریزی خطی و برنامه ریزی درجه دوم محدب گنجانده شده است در بهینه سازی دارای اهمیت می باشد. این مقاله به بیان روشی جدید برای حل دستگاه معادلات قدرمطلق می پردازد. برای این منظور، ابتدا دستگاه معادلات قدر مطلق رابه سیستم خطی تبدیل کرده و سپس برای حل آن از روش کارای لاگرانژ بهبود یافته استفاده می شود. این مقاله همچنین به بررسی دسته ای از مسایل مقدار مرزی دونقطه ای پرداخته و روشی جدید برای حل آن ارائه می دهد . نشان داده می شود این دسته از مسایل با دستگاه معادلات قدر مطلق معادل است. برای نشان دادن کارایی روش پیشنهادی، مسایل دستگاه معادلات قدر مطلق را بطور تصادفی تولید کرده و حل می نماییم . علاوه براین دسته ای از مسائل مقدار مرزی دو نقطه ای نیز از طریق دستگاه معادلات قدر مطلق و روش جدید حل می شوند . نتایج محاسباتی نشان می دهد روش پیشنهاد شده از سرعت و دقت بالایی برخوردار است. تفاصيل المقالة
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  3 - رویکرد تغییراتی برای وجود بینهایت جواب معادلات تفاضلی
  مجسن خالقی مقدم استفان ترزین مصطفی اوسی
  در این مقاله وجود بینهایت جواب برای مساله گسسته غیر خطی ناهمسانگر با نمای متغیر متناظر با عملگر ;پی کا- لاپلاسین با شرط مرزی دیریکله تحت رفتارهای مناسب تابع غیر خطی بررسی شده است. روش تغییراتی برای تابعک‌های مشتق پذیر بعنوان تکنیک حل مساله است که بر مبنای قضیه مینیموم م أکثر

  در این مقاله وجود بینهایت جواب برای مساله گسسته غیر خطی ناهمسانگر با نمای متغیر متناظر با عملگر ;پی کا- لاپلاسین با شرط مرزی دیریکله تحت رفتارهای مناسب تابع غیر خطی بررسی شده است. روش تغییراتی برای تابعک‌های مشتق پذیر بعنوان تکنیک حل مساله است که بر مبنای قضیه مینیموم موضعی ریچری مورد استفاده قرار می‌گیرد. قضیه‌ای بعنوان یک نمونه از نتایج اصلی که در واقع بیان موضوع در یک حالت خاص است، ارائه می‌شود. با انتخاب دو تابعک غیر خطی مشتق پذیر و بنا نهادن چهارچوب تغییراتی، یک لم کاربردی ارائه می‌شود که در آن پارامتر لاندا در یک بازه مشخص قرار دارد. با در نظر گرفتن این لم اساسی و استفاده از قضیه مینیموم ریچری، نتیجه اصلی که وجود یک دنباله از بینهایت جواب همگرا به صفر تحت رفتارهای مناسب در صفر برای تابع غیر خطی می‌باشد، بیان می‌شود. بطوری-که مساله گسسته غیر خطی ناهمسانگر در یک بازه‌ی دقیق لاندا از پارامتر ، بینهایت جواب می‌پذیرد که نرم این جواب‌ها به صفر میل می‌کند. در ادامه چند تبصره و گزاره و اثبات حالت خاص نتیجه اصلی مطرح می‌شود. در خاتمه برای توضیح نتایج اصلی چندین مثال بعنوان کاربردهایی از مساله ارائه شده است. تفاصيل المقالة
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  4 - وجود حداقل سه جواب ضعیف برای یک دستگاه شبه‌خطی بیضوی
  سعید شکوه
  در این مقاله با استفاده از قضیه‌هایی که توسط پروفسور ریچری در مقاله [8] و پروفسور بوناننو در مقاله [6] اثبات شده است، وجود حداقل سه جواب ضعیف را برای یک دستگاه شبه‌خطی بیضوی ثابت خواهیم کرد. در واقع، ما به دستگاه معادله دیفرانسیل یک عملگر غیرخطی مشتق‌پذیر نسبت خواهیم دا أکثر

  در این مقاله با استفاده از قضیه‌هایی که توسط پروفسور ریچری در مقاله [8] و پروفسور بوناننو در مقاله [6] اثبات شده است، وجود حداقل سه جواب ضعیف را برای یک دستگاه شبه‌خطی بیضوی ثابت خواهیم کرد. در واقع، ما به دستگاه معادله دیفرانسیل یک عملگر غیرخطی مشتق‌پذیر نسبت خواهیم داد به‌طوری‌که نقاط بحرانی این عملگر جواب‌های ضعیف از دستگاه مورد‌نظر باشند. تفاصيل المقالة
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  5 - یک روش تحلیلی بهینه برای حل مسائل مقدار مرزی غیرخطی بر پایه روش تغییر پارامتر
  رحمت درزی بهرام عاقلی
  در این مقاله، نویسندگان یک الگوریتم تحلیلی همگرای اصلاح شده را برای جواب مسائل مقدار مرزی و مقدار اولیه غیرخطی به واسطه روش تغییر پارامتر ارائه می­کنند و بطور خلاصه روش تغییر پارامتر بهینه می­نامند. این روش براساس تعبیه یک پارامتر و یک عملگر کمکی، یک مزیت محاسبا أکثر

  در این مقاله، نویسندگان یک الگوریتم تحلیلی همگرای اصلاح شده را برای جواب مسائل مقدار مرزی و مقدار اولیه غیرخطی به واسطه روش تغییر پارامتر ارائه می­کنند و بطور خلاصه روش تغییر پارامتر بهینه می­نامند. این روش براساس تعبیه یک پارامتر و یک عملگر کمکی، یک مزیت محاسباتی برای همگرایی جواب­های تقریبی معادلات دیفرانسیل غیرخطی مهیا می­کند. همگرایی توسعه یافته مذ کور نشان داده شده و جزییات آن نیز مورد بحث قرار می­گیرد. علاوه بر این، یک روش مناسب برای انتخاب مقدار بهینه پارامتر کمکی در نظر گرفته می­شود که تحت مینیمم­سازی خطا روی دامنه مساله می­باشد. موثر بودن روش و دقت الگوریتم پیشنهادی، با اجرا روی مسائل فیزیکی همچون مساله استورم- لیوویل، مساله ایری و مساله نوسانگر هارمونیک کوانتومی نشان داده می­شود. نتایج عددی و شکل­های بدست آمده بوضوح دقت الگوریتم و همگرایی آن را منعکس می­کند. تفاصيل المقالة
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  6 - An ‎E‎ffective Numerical Technique for Solving Second Order Linear Two-Point Boundary Value Problems with Deviating Argument
  M. Khaleghi E. Babolian S. Abbasbandy
  Based on reproducing kernel theory, an effective numerical technique is proposed for solving second order linear two-point boundary value problems with deviating argument. In this method, reproducing kernels with Chebyshev polynomial form are used (C-RKM). The convergen أکثر

  Based on reproducing kernel theory, an effective numerical technique is proposed for solving second order linear two-point boundary value problems with deviating argument. In this method, reproducing kernels with Chebyshev polynomial form are used (C-RKM). The convergence and an error estimation of the method are discussed. The efficiency and the accuracy of the method is demonstrated on some numerical examples. تفاصيل المقالة
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  7 - An Efficient Numerical Method for a Class of Boundary Value Problems, Based on Shifted Jacobi-Gauss Collocation Scheme
  M. Maleki Miyane S. Abbasbandy
  We present a numerical method for a class of boundary value problems on the unit interval which feature a type of exponential and product nonlinearities. Also, we consider singular case. We construct a kind of spectral collocation method based on shifted Jacobi polynomi أکثر

  We present a numerical method for a class of boundary value problems on the unit interval which feature a type of exponential and product nonlinearities. Also, we consider singular case. We construct a kind of spectral collocation method based on shifted Jacobi polynomials to implement this method. A number of specific numerical examples demonstrate the accuracy and the efficiency of the proposed method. تفاصيل المقالة
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  8 - Existence and Uniqueness Analysis for a Class of Singular Non-Linear Two-Point Boundary Value Problems by an Optimal Iterative ‎Sequence
  E. Shivanian
  10.30495/ijim.2022.44028.1312
  The convergence of thisiterative sequence is then controlled by an embedded parameter. The fastest convergence occurs for an optimal embedded parameter which maximizes a special function. This optimization problem brings a sequence with high rate of the convergence to t أکثر

  The convergence of thisiterative sequence is then controlled by an embedded parameter. The fastest convergence occurs for an optimal embedded parameter which maximizes a special function. This optimization problem brings a sequence with high rate of the convergence to theunique solution in the finite region where $\frac{\partial f}{\partial y}$ has to be positive.Some illustrative examples are given to confirm the validity and reliability of this constructive theory. تفاصيل المقالة
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  9 - ‎Solving Some Initial-Boundary Value Problems Including Non-classical ‎C‎ases of Heat Equation By Spectral and Countour Integral ‎Methods‎
  M. Jahanshahi N. Aliev F. Jahanshahi
  In this paper, we consider some initial-boundary value problems which contain one-dimensional heat equation in non-classical case. For this problem, we can not use the classical methods such as Fourier, Laplace transformation and Fourier-Birkhoff methods. Because the ei أکثر

  In this paper, we consider some initial-boundary value problems which contain one-dimensional heat equation in non-classical case. For this problem, we can not use the classical methods such as Fourier, Laplace transformation and Fourier-Birkhoff methods. Because the eigenvalues of their spectral problems are not strictly and they are repeated or we have no eigenvalue. The presentation of the solution and also satisfying the solution in the given P.D.E and satisfing the given initial and boundary conditions are established by complex analysis theory and Countour integral ‎method. تفاصيل المقالة
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  10 - Optimal Swing up of Double Inverted Pendulum using Indirect Method
  Maral Salehi Amin Nikoobin Ebrahim Shahab
  In this paper, optimal swing up of a double inverted pendulum (DIP) with two underactuated degrees of freedom (DOFs) is solved using the indirect solution of optimal control problem. Unlike the direct method that leads to an approximate solution, the proposed indirect m أکثر

  In this paper, optimal swing up of a double inverted pendulum (DIP) with two underactuated degrees of freedom (DOFs) is solved using the indirect solution of optimal control problem. Unlike the direct method that leads to an approximate solution, the proposed indirect method results in an exact solution of the optimal control problem, but suffers from its limited convergence domain which makes it difficult to solve. In order to overcome this problem, an inversion-based method is used to obtain the required initial solution for the indirect method. In the proposed methodology, dynamic equations are derived for a general inverted pendulum using Euler-Lagrange formulation. Then the necessary optimality conditions are derived for a DIP on the cart using the Pontryagin’s maximum principle (PMP). The obtained equations establish a two-point boundary value problem (TPBVP) which solution results in optimal trajectories of the cart and pendulums. In order to demonstrate the applicability of the presented method, a simulation study is performed for a DIP. The simulation results confirm the superiority of the proposed method in terms of reduced effort. تفاصيل المقالة
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  11 - An Axisymmetric Torsion Problem of an Elastic Layer on a Rigid Circular Base
  B Kebli S Berkane F Guerrache
  10.22034/jsm.2019.1868197.1441
  A solution is presented to a doubly mixed boundary value problem of the torsion of an elastic layer, partially resting on a rigid circular base by a circular rigid punch attached to its surface. This problem is reduced to a system of dual integral equations using the Bo أکثر

  A solution is presented to a doubly mixed boundary value problem of the torsion of an elastic layer, partially resting on a rigid circular base by a circular rigid punch attached to its surface. This problem is reduced to a system of dual integral equations using the Boussinesq stress functions and the Hankel integral transforms. With the help of the Gegenbauer expansion formula of the Bessel function we get an infinite algebraic system of simultaneous equations for calculating the unknown function of the problem. Both the two contact stresses under the punch and on the lower face of the layer are expressed as appropriate Chebyshev series. The effects of the radius of the disc with the rigid base and the layer thickness on the displacements, contact stresses as well as the shear stress and the stress singularity factor are discussed. A numerical application is also considered with some concluding results. تفاصيل المقالة
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  12 - An Axisymmetric Contact Problem of a Thermoelastic Layer on a Rigid Circular Base
  F Guerrache B Kebli
  10.22034/jsm.2019.668619
  We study the thermoelastic deformation of an elastic layer. The upper surface of the medium is subjected to a uniform thermal field along a circular area while the layer is resting on a rigid smooth circular base. The doubly mixed boundary value problem is reduced to a أکثر

  We study the thermoelastic deformation of an elastic layer. The upper surface of the medium is subjected to a uniform thermal field along a circular area while the layer is resting on a rigid smooth circular base. The doubly mixed boundary value problem is reduced to a pair of systems of dual integral equations. The both system of the heat conduction and the mechanical problems are calculated by solving a dual integral equation systems which are reduced to an infinite algebraic one using a Gegenbauer’s formulas. The stresses and displacements are then obtained as Bessel function series. To get the unknown coefficients, the infinite systems are solved by the truncation method. A closed form solution is given for the displacements, stresses and the stress singularity factors. The effects of the radius of the punch with the rigid base and the layer thickness on the stress field are discussed. A numerical application is also considered with some concluding results. تفاصيل المقالة
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  13 - Two-dimensional Axisymmetric Electromechanical Response of Piezoelectric, Functionally Graded and Layered Composite Cylinders
  T Kant P Desai
  A mixed semi-analytical cum numerical approach is presented in this paper which accounts for the coupled mechanical and electrical response of piezoelectric, functionally graded (FG) and layered composite hollow circular cylinders of finite length. Under axisymmetric me أکثر

  A mixed semi-analytical cum numerical approach is presented in this paper which accounts for the coupled mechanical and electrical response of piezoelectric, functionally graded (FG) and layered composite hollow circular cylinders of finite length. Under axisymmetric mechanical and electrical loadings, the three-dimensional problem (3D) gets reduced to a two-dimensional (2D) plane strain problem of elasticity. The 2D problem is further simplified and reduced to a one-dimensional (1D) by assuming an analytical solution in longitudinal direction (z) in terms of Fourier series expansion which satisfies the simply (diaphragm) supported boundary conditions exactly at the two ends z = 0, l. Fundamental (basic) dependent variables are chosen in the radial direction (thickness coordinate) of the cylinder. The resulting mathematical model is cast in the form of first order simultaneous ordinary differential equations which are integrated through an effective numerical integration technique by first transforming the BVP into a set of initial value problems (IVPs). The cylinder is subjected to internal/external pressurized mechanical and an electrical loading. Finally, numerical results are obtained which govern the active and sensory response of piezoelectric and FG cylinders. Numerical results are compared for their accuracy with available results. New results of finite length cylinders are generated and presented for future reference. تفاصيل المقالة
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  14 - Using finite difference method for solving linear two-point fuzzy boundary value problems based on extension principle
  Seyed Majid Alavi
  In this paper an efficient Algorithm based on Zadeh's extension principle has been investigated to approximate fuzzy solution of two-point fuzzy boundary value problems, with fuzzy boundary values. We use finite difference method in term of the upper bound and lower bou أکثر

  In this paper an efficient Algorithm based on Zadeh's extension principle has been investigated to approximate fuzzy solution of two-point fuzzy boundary value problems, with fuzzy boundary values. We use finite difference method in term of the upper bound and lower bound of $r$- level of fuzzy boundary values. The proposed approach gives a linear system with crisp tridiagonal coefficients matrix. This linear system determines $r$-level of fuzzy solution at mesh points. By combining of this solutions, we obtain fuzzy solution of main problem at mesh points, approximately. Its applicabilityis illustrated by someexamples تفاصيل المقالة
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  15 - Application of variational iteration method for solving singular two point boundary value problems
  Shadan Sadigh Behzadi
  In this paper, He's highly prolic variational iteration method is applied ef-fectively for showing the existence, uniqueness and solving a class of singularsecond order two point boundary value problems. The process of nding solu-tion involves generation of a sequence أکثر

  In this paper, He's highly prolic variational iteration method is applied ef-fectively for showing the existence, uniqueness and solving a class of singularsecond order two point boundary value problems. The process of nding solu-tion involves generation of a sequence of appropriate and approximate iterativesolution function equally likely to converge to the exact solution of the givenproblem which being processed out and improvised on its own at every step re-cursively. Moreover, Illustrative examples available to the context in literaturewhen treated with, by application of such proposed method fetch encouragingresults so as to justify and reveal its eciency and usefulness of the method. تفاصيل المقالة
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  16 - Positive solution for boundary value problem of fractional dierential equation
  Haidong Qu
  In this paper, we prove the existence of the solution for boundary value prob-lem(BVP) of fractional dierential equations of order q 2 (2; 3]. The Kras-noselskii's xed point theorem is applied to establish the results. In addition,we give an detailed example to demons أکثر

  In this paper, we prove the existence of the solution for boundary value prob-lem(BVP) of fractional dierential equations of order q 2 (2; 3]. The Kras-noselskii's xed point theorem is applied to establish the results. In addition,we give an detailed example to demonstrate the main result. تفاصيل المقالة
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  17 - Positive Solution for Boundary Value Problem of Fractional Dierential Equation
  H. Qu
  In this paper, we prove the existence of the solution for boundary value prob-lem(BVP) of fractional dierential equations of order q 2 (2; 3]. The Kras-noselskii's xed point theorem is applied to establish the results. In addition,we give an detailed example to demons أکثر

  In this paper, we prove the existence of the solution for boundary value prob-lem(BVP) of fractional dierential equations of order q 2 (2; 3]. The Kras-noselskii's xed point theorem is applied to establish the results. In addition,we give an detailed example to demonstrate the main result. تفاصيل المقالة
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  18 - New existence results for boundary value problems with integral conditions
  Rahmat Darzi Roja Mahmoudi Matankolae
  10.30495/fomj.2021.1921740.1023
  In this paper, we investigate the existence and uniqueness of solution for fractionalboundary value problem (FBVP) with the integral boundary conditions. We use the contraction mapping principle and Krasnoselskii’s fixed point theorem to obtain some new existence أکثر

  In this paper, we investigate the existence and uniqueness of solution for fractionalboundary value problem (FBVP) with the integral boundary conditions. We use the contraction mapping principle and Krasnoselskii’s fixed point theorem to obtain some new existence and uniqueness results. تفاصيل المقالة
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  19 - A BACKWARD DIFFERENTIATION FORMULA FOR THIRD-ORDER INITIAL OR BOUNDARY VALUES PROBLEMS USING COLLOCATION METHOD
  GAFAR TIAMIYU Abosede COLE KHADEEJAH AUDU
  We propose a new self-starting sixth-order hybrid block linear multistep method using backward differentiation formula for direct solution of third-order differential equations with either initial conditions or boundary conditions. The method used collocation and interp أکثر

  We propose a new self-starting sixth-order hybrid block linear multistep method using backward differentiation formula for direct solution of third-order differential equations with either initial conditions or boundary conditions. The method used collocation and interpolation techniques with three off-step points and five-step points, choosing power series as the basis function. The convergence of the method is established, and three numerical experiments of initial and boundary value problems are used to demonstrate the efficiency of the proposed method. The numerical results in Tables and Figures show the efficiency of the method. Furthermore, the numerical method outperformed the results from existing literature in terms of accuracy as evident in the results of absolute errors produced. تفاصيل المقالة
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  20 - Legendre Wavelet Method for a Class of Fourth-Order Boundary Value Problems
  سرکوت عبدی آرام عزیزی محمود شفیعی جمشید سعیدیان
  In this paper we apply an approximate method based on Galerkin approach with Legendre wavelets basis, on a class of fourth order boundary value problems. The approach reduces the main equation to a system of linear algebraic equations that could be solved numerically. T أکثر

  In this paper we apply an approximate method based on Galerkin approach with Legendre wavelets basis, on a class of fourth order boundary value problems. The approach reduces the main equation to a system of linear algebraic equations that could be solved numerically. The operational matrix of the method is obtained, and the convergence of the method is proved. we approximate the solution and its higher order derivatives, for some special examples and compare the results with some other numerical methods. The results show the effectiveness of the proposed method. تفاصيل المقالة
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  21 - Well- posedness of the Rothe difference scheme for reverse parabolic equations
  Allaberen Ashyralyev Ayfer Dural Yaşar Sözen
  We consider the Rothe difference scheme for approximate solution of the abstract parabolic equation in a Hilbert space with the nonlocal boundary condition. Theorems on stability estimates, coercivity and almost coercivity estimates for the solution of this difference s أکثر

  We consider the Rothe difference scheme for approximate solution of the abstract parabolic equation in a Hilbert space with the nonlocal boundary condition. Theorems on stability estimates, coercivity and almost coercivity estimates for the solution of this difference scheme are established. In application, new coercivity inequalities for the solution of multi-point nonlocal boundary value difference equations of parabolic type are obtained. تفاصيل المقالة
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  22 - Existence and multiplicity of positive solutions for a class of semilinear elliptic system with nonlinear boundary conditions
  F. M. Yaghoobi J. Shamshiri
  This study concerns the existence and multiplicity of positive weak solutions for a class ofsemilinear elliptic systems with nonlinear boundary conditions. Our results is depending onthe local minimization method on the Nehari manifold and some variational techniques. A أکثر

  This study concerns the existence and multiplicity of positive weak solutions for a class ofsemilinear elliptic systems with nonlinear boundary conditions. Our results is depending onthe local minimization method on the Nehari manifold and some variational techniques. Also,by using Mountain Pass Lemma, we establish the existence of at least one solution withpositive energy. تفاصيل المقالة
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  23 - Solvability of the infinite systems of nonlinear third-order differential equations in the weighted sequence space ${\bf m_\omega(\Delta_{\mathfrak{v}}^{\varsigma}‎, ‎\psi,q)}$
  M. Khanehgir H. Amiri Kayvanloo R. Allahyari M. Mehrabinezhad
  10.30495/jlta.2023.1980047.1539
  ‎In this work‎, ‎we first introduce the concept of weighted sequence space $m_\omega(\Delta_{\mathfrak{v}}^{\varsigma}‎, ‎\psi,q)$‎. ‎Then‎, ‎we construct a Hausdorff measure of noncompactness on this sequence space‎. ‎Further أکثر

  ‎In this work‎, ‎we first introduce the concept of weighted sequence space $m_\omega(\Delta_{\mathfrak{v}}^{\varsigma}‎, ‎\psi,q)$‎. ‎Then‎, ‎we construct a Hausdorff measure of noncompactness on this sequence space‎. ‎Furthermore‎, ‎by employing this measure of noncompactness we discuss the solvability of an infinite system of nonlinear third-order differential equations with initial conditions in the weighted sequence space $m_\omega(\Delta_{\mathfrak{v}}^{\varsigma}‎, ‎\psi,q)$‎. ‎Eventually‎, ‎we demonstrate an example to show the usefulness of the obtained result‎. تفاصيل المقالة
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  24 - Some properties of band matrix and its application to the numerical solution one-dimensional Bratu's problem
  R. Jalilian Y. Jalilian H. Jalilian
  A Class of new methods based on a septic non-polynomial spline function for the numerical solution one-dimensional Bratu's problem are presented. The local truncation errors and the methods of order 2th, 4th, 6th, 8th, 10th, and 12th, are obtained. The inverse of some b أکثر

  A Class of new methods based on a septic non-polynomial spline function for the numerical solution one-dimensional Bratu's problem are presented. The local truncation errors and the methods of order 2th, 4th, 6th, 8th, 10th, and 12th, are obtained. The inverse of some band matrixes are obtained which are required in proving the convergence analysis of the presented method. Associated boundary formulas are developed. Convergence analysis of these methods is discussed. Numerical results are given to illustrate the efficiency of methods. تفاصيل المقالة
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  25 - A Novel Finite Difference Method of Order Three for the Third Order Boundary Value Problem in ODEs
  Pramod Pandey
  In this article we have developed third order exact finite difference method for the numerical solution of third order boundary value problems. We constructed our numerical technique without change in structure of the coefficient matrix of the second-order method in \ci أکثر

  In this article we have developed third order exact finite difference method for the numerical solution of third order boundary value problems. We constructed our numerical technique without change in structure of the coefficient matrix of the second-order method in \cite{Pand}. We have discussed convergence of the proposed method. Numerical experiments on model test problems approves the simply high accuracy and efficiency of the method. تفاصيل المقالة
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  26 - ‎A Consistent and Accurate Numerical Method for Approximate Numerical Solution of Two Point Boundary Value Problems
  Pramod Pandey
  In this article we have proposed an accurate finite difference method for approximate numerical solution of second order boundary value problem with Dirichlet boundary conditions. There are numerous numerical methods for solving these boundary value problems. Some these أکثر

  In this article we have proposed an accurate finite difference method for approximate numerical solution of second order boundary value problem with Dirichlet boundary conditions. There are numerous numerical methods for solving these boundary value problems. Some these methods are more efficient and accurate than others with some advantages and disadvantages. The results in experiment on model problems show an improved and good approximation to the solution of considered problems. تفاصيل المقالة
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  27 - NON-POLYNOMIAL SPLINE FOR THE NUMERICAL SOLUTION OF PROBLEMS IN CALCULUS OF VARIATIONS
  Reza Jalilian J. Rashidinia K. Farjian H. Jalilian
  A Class of new methods based on a septic non-polynomial spline function for the numerical solution of problems in calculus of variations is presented. The local truncation errors and the methods of order 2th, 4th, 6th, 8th, 10th, and 12th, are obtained. The inverse of s أکثر

  A Class of new methods based on a septic non-polynomial spline function for the numerical solution of problems in calculus of variations is presented. The local truncation errors and the methods of order 2th, 4th, 6th, 8th, 10th, and 12th, are obtained. The inverse of some band matrixes are obtained which are required in proving the convergence analysis of the presented method. Convergence analysis of these methods is discussed. Numerical results are given to illustrate the eciency of methods and compared with the methods in [28-32]. تفاصيل المقالة
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  28 - NUMERICAL SOLUTIONS OF SECOND ORDER BOUNDARY VALUE PROBLEM BY USING HYPERBOLIC UNIFORM B-SPLINES OF ORDER 4
  Abdellah Lamnii
  In this paper, using the hyperbolic uniform spline of order 4 we develop the classes of methods for the numerical solution of second order boundary value problems (2VBP) with Dirichlet, Neumann and Cauchy types boundary conditions. The second derivativeis approximated b أکثر

  In this paper, using the hyperbolic uniform spline of order 4 we develop the classes of methods for the numerical solution of second order boundary value problems (2VBP) with Dirichlet, Neumann and Cauchy types boundary conditions. The second derivativeis approximated by the three-point central difference scheme. The approximate results, obtained by the proposed method, confirm theconvergence of numerical solutions. Numerical results are given to illustrate the efficiency of our methods. تفاصيل المقالة
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  29 - B-SPLINE METHOD FOR TWO-POINT BOUNDARY VALUE PROBLEMS
  Jalil Rashidinia Shokofeh Sharifi
  In this work the collocation method based on quartic B-spline is developed and applied to two-point boundary value problem in ordinary diferential equations. The error analysis and convergence of presented method is discussed. The method illustrated by two test example أکثر

  In this work the collocation method based on quartic B-spline is developed and applied to two-point boundary value problem in ordinary diferential equations. The error analysis and convergence of presented method is discussed. The method illustrated by two test examples which verify that the presented method is applicable and considerable accurate. تفاصيل المقالة
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  30 - SOLVING LINEAR SIXTH-ORDER BOUNDARY VALUE PROBLEMS BY USING HYPERBOLIC UNIFORM SPLINE METHOD
  Omar El Khayyari
  In this paper, a numerical method is developed for solving a linear sixth order boundaryvalue problem (6VBP ) by using the hyperbolic uniform spline of order 3 (lower order). Thereis proved to be first-order convergent. Numerical results confirm the order of convergence أکثر

  In this paper, a numerical method is developed for solving a linear sixth order boundaryvalue problem (6VBP ) by using the hyperbolic uniform spline of order 3 (lower order). Thereis proved to be first-order convergent. Numerical results confirm the order of convergencepredicted by the analysis. تفاصيل المقالة
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  31 - APPLICATION OF THE SINGULAR BOUNDARY VALUE PROBLEM FOR INVESTIGATION OF PISTON DYNAMICS UNDER POLYTROPIC EXPANSION PROCESS
  B. Mehri A. Zahedi Nejad
  In this paper a mathematical simulation of a simplified internal combustion engine is presented. To contribute engine kinematics and its geometry, simple relations are derived for constrained motions. The equation of motion for the piston forms a singular boundary value أکثر

  In this paper a mathematical simulation of a simplified internal combustion engine is presented. To contribute engine kinematics and its geometry, simple relations are derived for constrained motions. The equation of motion for the piston forms a singular boundary value problem. The uniqueness of the solution was studied in the Banach space. For solving governing equations an iterative numerical algorithm was used and the numerical method has shown very fast convergency. With this simulation the thermodynamics of expansion process is coupled with piston dynamics. Simulating an engine working at constant torque and polytropic expansions has shown high frequency piston vibration under certain conditions. تفاصيل المقالة
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  32 - APPLICATION OF THE SINC APPROXIMATION TO THE SOLUTION OF BRATU'S PROBLEM
  J. Rashidinia N. Taher
  In this work, we study the performance of the sinc-Collocation method for solving Bratu's problem. For different choices of step size, we consider the maximum absolute errors in the solutions at sinc grid points and tabulated in tables. The comparison of the obtained re أکثر

  In this work, we study the performance of the sinc-Collocation method for solving Bratu's problem. For different choices of step size, we consider the maximum absolute errors in the solutions at sinc grid points and tabulated in tables. The comparison of the obtained results veri ed that this method converges to the exact solution rapidly and with تفاصيل المقالة
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  33 - TENSION TRIGONOMETRIC SPLINES INTERPOLATION METHOD FOR SOLVING A LINEAR BOUNDARY VALUE PROBLEM
  Omar El Khayyari Abdellah Lamnii Jaoud Dabounou
  By using the trigonometric uniform splines of order 3 with a real tension factor, a numericalmethod is developed for solving a linear second order boundary value problems (2VBP) withDirichlet, Neumann and Cauchy types boundary conditions. The moment at the knots isappro أکثر

  By using the trigonometric uniform splines of order 3 with a real tension factor, a numericalmethod is developed for solving a linear second order boundary value problems (2VBP) withDirichlet, Neumann and Cauchy types boundary conditions. The moment at the knots isapproximated by central finite-difference method. The order of convergence of the methodand the theory is illustrated by solving test examples. Experimental results demonstrate thatour method is more effective for the problems where the exact solution is trigonometric orhyperbolic. تفاصيل المقالة