Results 21 to 30 of about 2,896 (167)

Chebyshev polynomial method to Landauer–Büttiker formula of quantum transport in nanostructures

open access: yesAIP Advances, 2020
The Landauer–Büttiker formula describes the electronic quantum transport in nanostructures and molecules. It will be numerically demanding for simulations of complex or large size systems due to, for example, matrix inversion calculations.
Yan Yu   +6 more
doaj   +1 more source

Chebyshev pseudo-spectral method for optimal control problem of Burgers’ equation [PDF]

open access: yesIranian Journal of Numerical Analysis and Optimization, 2019
In this study, an indirect method is proposed based on the Chebyshev pseudo-spectral method for solving optimal control problems governed by Burgers’ equation.
F. Mohammadizadeh   +2 more
doaj   +1 more source

Chebyshev-Fourier Spectral Methods for Nonperiodic Boundary Value Problems

open access: yesJournal of Applied Mathematics, 2014
A new class of spectral methods for solving two-point boundary value problems for linear ordinary differential equations is presented in the paper. Although these methods are based on trigonometric functions, they can be used for solving periodic as well
Bojan Orel, Andrej Perne
doaj   +1 more source

Injection into Orbit Optimization using Orthogonal Polynomials [PDF]

open access: yesInternational Journal of Advanced Design and Manufacturing Technology, 2017
In this study, the problem of determining an optimal trajectory of a nonlinear injection into orbit problem with minimum time was investigated. The method was based on orthogonalpolynomial approximation.
Sedigheh Shahmirzaee Jeshvaghany   +2 more
doaj  

Heat transfer from convecting-radiating fin through optimized Chebyshev polynomials with interior point algorithm

open access: yesNonlinear Engineering, 2019
In this paper, the problem of determining heat transfer from convecting-radiating fin of triangular and concave parabolic shapes is investigated.We consider one-dimensional, steady conduction in the fin and neglect radiative exchange between adjacent ...
Shivanian Elyas   +2 more
doaj   +1 more source

Operational matrices based on the shifted fifth-kind Chebyshev polynomials for solving nonlinear variable order integro-differential equations

open access: yesAdvances in Difference Equations, 2021
In this research, we study a general class of variable order integro-differential equations (VO-IDEs). We propose a numerical scheme based on the shifted fifth-kind Chebyshev polynomials (SFKCPs). First, in this scheme, we expand the unknown function and
H. Jafari, S. Nemati, R. M. Ganji
doaj   +1 more source

A cardinal approach for two-dimensional modified anomalous space–time fractional sub-diffusion equation

open access: yesResults in Physics, 2023
In this paper, the modified anomalous space–time fractional sub-diffusion equation in two dimensions is introduced. The Chebyshev cardinal polynomials (as an appropriate family of basis functions) are successfully used to make a computational technique ...
M.H. Heydari
doaj   +1 more source

Fractional‐order sliding mode attitude coordinated control for spacecraft formation flying with unreliable wireless communication

open access: yesIET Control Theory & Applications, 2023
This paper investigates the coordinated attitude control problem with fractional order sliding mode control theory for spacecraft formation flying by considering of unknown disturbance, inertia uncertainty, partial loss of actuators, and communication ...
Fan Wu, Ming Liu, Zhenyu Feng, Xibin Cao
doaj   +1 more source

An approximate solution of one singular integro-differential equation using the method of orthogonal polynomials

open access: yesЖурнал Белорусского государственного университета: Математика, информатика, 2020
Two computational schemes for solving boundary value problems for a singular integro-differential equation, which describes the scattering of H-polarized electromagnetic waves by a screen with a curved boundary, are constructed.
Galina A. Rasolko, Sergei M. Sheshko
doaj   +1 more source

The influence of linear anisotropic scattering of one-speed neutrons on the critical size of a slab with reflective boundary conditions [PDF]

open access: yesNuclear Technology and Radiation Protection, 2017
The criticality problem for one-speed neutrons in a slab is investigated using Chebyshev polynomials of first kind in the series expansion of the neutron angular flux in stationary neutron transport equation.
Ozturk Hakan
doaj   +1 more source

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