Results 41 to 50 of about 186 (123)
IET Renewable Power Generation, Volume 19, Issue 1, January/December 2025.In this article, we propose an adaptive robust nonlinear optimal sliding mode control using the optimal homotopy asymptotic method (RNOSC‐OHAM) for maximizing wind power capture. Because of the unstable nature of the wind and the presence of uncertainties and disturbances in the structure of the wind turbine, the optimal controller cannot provide ...
Arefe Shalbafian +2 more
wiley +1 more source
Memory‐efficient compression of 𝒟ℋ2‐matrices for high‐frequency Helmholtz problems
Numerical Linear Algebra with Applications, Volume 31, Issue 6, December 2024.Abstract Directional interpolation is a fast and efficient compression technique for high‐frequency Helmholtz boundary integral equations, but requires a very large amount of storage in its original form. Algebraic recompression can significantly reduce the storage requirements and speed up the solution process accordingly.
Steffen Börm, Janne Henningsen
wiley +1 more source
Space‐time stochastic Galerkin boundary elements for acoustic scattering problems
International Journal for Numerical Methods in Engineering, Volume 125, Issue 15, 15 August 2024.Summary Acoustic emission or scattering problems naturally involve uncertainties about the sound sources or boundary conditions. This article initiates the study of time domain boundary elements for such stochastic boundary problems for the acoustic wave equation.
Heiko Gimperlein +2 more
wiley +1 more source
, 2014 Revisiting the author's paper from 1995 on this topic, a fully discrete collocation method is proposed for the hypersingular integral equation arising from the double-layer approach for the solution of Neumann boundary value problems in two dimensions ...
Kress, Rainer
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Advances in Mathematical Physics, Volume 2024, Issue 1, 2024.The boundary element method is widely used in practical engineering problems, especially in the field of acoustics. For flow‐induced noise, the main target of acoustic calculations is to solve the wave equation with the flow field information. However, the sound field distribution of noncompact structures in half‐space is especially complex because of ...
Wensi Zheng +2 more
wiley +1 more source
Peridynamic Model of Vibrations in a Two-Dimensional Periodic Structure
Vestnik KRAUNC: Fiziko-Matematičeskie NaukiUnlike classical continuum mechanics, where the linearized model is described by partial differential equations, the peridynamic model leads to an integro-differential equation with a non integrable kernel.
Yuldasheva, A.V.
doaj +1 more source
A new method for solving hypersingular integral equations of the first kind
, 2011 A simple and efficient method for solving hypersingular integral equations of the first kind in reproducing kernel spaces is developed. In order to eliminate the singularity of the equation, a transform is used.
Zhou, YongFang +3 more
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An approximation method for the hypersingular heat operator equation
, 2000 The original model problem is the two-dimensional heat conduction problem with vanishing initial data and a given Neumann-type boundary condition. In particular, certain choices of the representation formula for the heat potential yield the hypersingular
Hamina, Martti, Martti Hamina
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On the numerical solution of a hypersingular integral equation with fixed singularities
, 2009 : For the numerical solution of the hypersingular integral equation of a notched half-plane problem we propose collocation methods which look for an approximation of the derivative of the solution of the original equation.
M. R. CAPOBIANCO +2 more
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High-order kernel regularization of singular and hypersingular Helmholtz boundary integral operators
CoRRThis paper extends and analyzes the high-order kernel regularization framework of Beale & Tlupova (arXiv:2510.13639) to all four on-surface boundary integral operators of the Helmholtz Calderon calculus in three dimensions: the single-layer, double-layer, adjoint double-layer, and hypersingular operators.
Luiz M. Faria +2 more
openaire +2 more sources