Results 11 to 20 of about 73,015 (248)

BOUNDARY CONTROL OF ROD TEMPERATURE FIELD WITH A SELECTED POINT

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2022
In this paper, we study the issue of boundary control of the temperature field of a rod with a selected point. The main purpose of the work is to clarify the conditions for the existence of a boundary control that ensures the transition of the ...
K. B. Imanberdiyev   +3 more
doaj   +1 more source

Inverse Problem for a Fourth-Order Hyperbolic Equation with a Complex-Valued Coefficient

open access: yesMathematics, 2023
This paper studies the existence and uniqueness of the classical solution of inverse problems for a fourth-order hyperbolic equation with a complex-valued coefficient with Dirichlet and Neumann boundary conditions.
Asselkhan Imanbetova   +2 more
doaj   +1 more source

An Assessment of High-Order-Mode Analysis and Shape Optimization of Expansion Chamber Mufflers

open access: yesArchives of Acoustics, 2014
A substantial quantity of research on muffler design has been restricted to a low frequency range using the plane wave theory. Based on this theory, which is a one-dimensional wave, no higher order wave has been considered.
Min-Chie CHIU, Ying-Chun CHANG
doaj   +1 more source

Eigenfunction Families and Solution Bounds for Multiplicatively Advanced Differential Equations

open access: yesAxioms, 2020
A family of Schwartz functions W ( t ) are interpreted as eigensolutions of MADEs in the sense that W ( δ ) ( t ) = E W ( q γ t ) where the eigenvalue E ∈ R is independent of the advancing parameter q > 1 .
David W. Pravica   +2 more
doaj   +1 more source

On One Approximate Method of a Boundary Value Problem for a One-Dimensional Advection–Diffusion Equation

open access: yesAxioms, 2022
This article discusses the author’s version of the technology for solving a one-dimensional boundary value problem for a one-dimensional advection–diffusion equation based on the method of separation of variables, as well as the theory of eigenvalues and
Temirkhan Aleroev, Victor Orlov
doaj   +1 more source

Explicit characteristic equations for integral operators arising from well-posed boundary value problems of finite beam deflection on elastic foundation

open access: yesAIMS Mathematics, 2021
Characteristic equations for the whole class of integral operators arising from arbitrary well-posed two-point boundary value problems of finite beam deflection resting on elastic foundation are obtained in terms of 4×4 matrices in block-diagonal form ...
Sung Woo Choi
doaj   +1 more source

Prescribing the nodal set of the first eigenfunction in each conformal class [PDF]

open access: yes, 2015
We consider the problem of prescribing the nodal set of the first nontrivial eigenfunction of the Laplacian in a conformal class. Our main result is that, given a separating closed hypersurface $\Sigma$ in a compact Riemannian manifold $(M,g_0)$ of ...
Enciso, Alberto   +2 more
core   +1 more source

Eigenvalues of Toeplitz minimal systems of finite topological rank [PDF]

open access: yes, 2015
In this article we characterize measure theoretical eigenvalues of Toeplitz Bratteli-Vershik minimal systems of finite topological rank which are not associated to a continuous eigenfunction.
Durand, Fabien   +2 more
core   +2 more sources

Existence of Nonnegative Solutions of Linear Autonomous Functional Differential Equations

open access: yesMathematics, 2020
It is shown that if we exclude the existence of nontrivial small solutions, then a linear autonomous functional differential equation has a nontrivial nonnegative solution if and only if it has a nonnegative eigenfunction.
Mihály Pituk
doaj   +1 more source

Effective decoupling method for derivation of eigenfunctions for closed cylindrical shell

open access: yesMechanics and Advanced Technologies, 2023
By expansion into Fourier series along the circumferential coordinate, the problem for elastic thin-walled closed cylindrical shell is reduced to 8th order differential equation with respect to axial coordinate.
Hlib Yudin, Igor Orynyak
doaj   +1 more source

Home - About - Disclaimer - Privacy