Search Results - "Yousefi, S. A."

Operational matrices of Bernstein polynomials and their applications by Yousefi, S.A., Behroozifar, M.

“…The Bernstein polynomials (B-polynomials) operational matrices of integration P, differentiation D and product Ĉ are derived. A general procedure of forming…”
Get full text

The use of He's variational iteration method for solving the telegraph and fractional telegraph equations by Dehghan, Mehdi, Yousefi, S. A., Lotfi, A.

“…In this paper the variational iteration method is used to compute the solution for the linear, variable coefficient, fractional derivative and multi space…”
Get full text

The operational matrices of Bernstein polynomials for solving the parabolic equation subject to specification of the mass by Yousefi, S.A., Behroozifar, M., Dehghan, Mehdi

“…Some physical problems in science and engineering are modelled by the parabolic partial differential equations with nonlocal boundary specifications. In this…”
Get full text

Determination of a time-dependent diffusivity from nonlocal conditions by Lesnic, D., Yousefi, S. A., Ivanchov, M.

“…The inverse problem of determining the temperature and the time-dependent thermal diffusivity from various additional nonlocal information is investigated…”
Get full text

The linear Legendre mother wavelets operational matrix of integration and its application by Khellat, F., Yousefi, S.A.

“…The linear Legendre mother wavelets operational matrix of integration P is derived. A general procedure of forming this matrix P is given. This matrix P can be…”
Get full text

Ritz-Galerkin method with Bernstein polynomial basis for finding the product solution form of heat equation with non-classic boundary conditions by Yousefi, S.A, Barikbin, Zahra, Dehghan, Mehdi

“…Purpose - The purpose of this paper is to implement the Ritz-Galerkin method in Bernstein polynomial basis to give approximation solution of a parabolic…”
Get full text

Numerical approach based on fractional-order Lagrange polynomials for solving a class of fractional differential equations by Sabermahani, S., Ordokhani, Y., Yousefi, S. A.

“…In this study, we propose a new set of fractional functions based on the Lagrange polynomials to solve a class of fractional differential equations. Fractional…”
Get full text

Legendre multiwavelet functions for numerical solution of multi-term time-space convection–diffusion equations of fractional order by Sokhanvar, E., Askari-Hemmat, A., Yousefi, S. A.

“…In this study, the Ritz–Galerkin method based on Legendre multiwavelet functions is introduced to solve multi-term time-space convection–diffusion equations of…”
Get full text

A numerical technique for solving fractional optimal control problems by Lotfi, A., Dehghan, Mehdi, Yousefi, S.A.

“…This paper presents a numerical method for solving a class of fractional optimal control problems (FOCPs). The fractional derivative in these problems is in…”
Get full text

Using a meshless kernel-based method to solve the Black–Scholes variational inequality of American options by Moradipour, M., Yousefi, S. A.

“…Under the Black–Scholes model, the value of an American option solves a free boundary problem which is equivalent to a variational inequality problem. Using…”
Get full text

He’s variational iteration method for solving nonlinear mixed Volterra–Fredholm integral equations by Yousefi, S.A., Lotfi, A., Dehghan, Mehdi

“…In this paper He’s variational iteration method is used to give the approximate solution of nonlinear mixed Volterra–Fredholm integral equations. The method…”
Get full text

A numerical technique for solving a class of fractional variational problems by Lotfi, A., Yousefi, S.A.

“…This paper presents a numerical method for solving a class of fractional variational problems (FVPs) with multiple dependent variables, multi order fractional…”
Get full text

The use of a Legendre multiwavelet collocation method for solving the fractional optimal control problems by Yousefi, SA, Lotfi, A, Dehghan, M

“…In this article the Legendre multiwavelet basis with the aid of a collocation method has been applied to give the approximate solution for the fractional…”
Get full text

A numerical method for solving a nonlinear 2-D optimal control problem with the classical diffusion equation by Mamehrashi, K., Yousefi, S.A.

“…This paper presents a numerical solution for solving a nonlinear 2-D optimal control problem (2DOP). The performance index of a nonlinear 2DOP is described…”
Get full text

Application of Legendre wavelets for solving fractional differential equations by Jafari, H., Yousefi, S.A., Firoozjaee, M.A., Momani, S., Khalique, C.M.

“…In this paper, we develop a framework to obtain approximate numerical solutions to ordinary differential equations (ODEs) involving fractional order…”
Get full text

Numerical solution of the nonlinear age-structured population models by using the operational matrices of Bernstein polynomials by Yousefi, S.A., Behroozifar, M., Dehghan, Mehdi

“…In this paper a numerical method for solving the nonlinear age-structured population models is presented which is based on Bernstein polynomials approximation…”
Get full text

Generalized Euler–Lagrange equations for fractional variational problems with free boundary conditions by Yousefi, S.A., Dehghan, Mehdi, Lotfi, A.

“…In this article we are going to present necessary conditions which must be satisfied to make the fractional variational problems (FVPs) with completely free…”
Get full text

Finding a control parameter in a one-dimensional parabolic inverse problem by using the Bernstein Galerkin method by Yousefi, S.A.

“…An inverse problem concerning a diffusion equation with source control parameter is considered. The approximation of the problem is based on the Bernstein…”
Get full text

The use of He's variational iteration method for solving variational problems by Yousefi, S. A., Dehghan, Mehdi

“…In this paper, the variational iteration method is implemented to give approximate solution of the Euler-Lagrange, Euler-Poisson and Euler-Ostrogradsky…”
Get full text

Finding the optimal control of linear systems via He's variational iteration method by Yousefi, S. A., Dehghan, Mehdi, Lotfi, A.

“…In this article, He's variational iteration method has been applied to find the optimal control of linear systems, approximately. Numerical results are given…”
Get full text