Results 81 to 90 of about 1,219,987 (236)
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
Newton methods for a class of nonlinear hypersingular integral equations
, 2009 : Different collocation iterative schemes have been well studied and widely applied for numerical solution of nonlinear hypersingular integral equations.
M. R. CAPOBIANCO +2 more
core +1 more source
Osaka Journal of Mathematics, 1990 The author extends results of \textit{E. M. Stein} [Singular integrals and differentiability properties of functions (1970; Zbl 0207.13501)] and \textit{R. L. Wheeden} [Trans. Am. Math. Soc. 139, 37-53 (1969; Zbl 0175.14502)] concerning hypersingular integrals.
openaire +4 more sources
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
Dynamic interaction of cracks in piezoelectric and anisotropic solids: A non-hypersingular BIEM approach [PDF]
Theoretical and Applied Mechanics, 2008 A non-hypersingular traction boundary integral equation method (BIEM) is proposed for the treatment of crack systems in piezoelectric or anisotropic plane domains loaded by time-harmonic waves. The solution is based on the frequency dependent fundamental
Dineva Petia +2 more
doaj +1 more source
Optimal additive Schwarz preconditioning for hypersingular integral equations on locally refined triangulations [PDF]
Calcolo, 2013 For the non-preconditioned Galerkin matrix of the hypersingular integral operator, the condition number grows with the number of elements as well as the quotient of the maximal and the minimal mesh-size.
M. Feischl +3 more
semanticscholar +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
On the general solution of first-kind hypersingular integral equations
, 2016 A new algorithm is presented to provide a general solution for a first type Hyper singular Integral Equation (HSIE). The singular integral has been converted into a regular form by cancelling the singularity and then transforming it into a system of ...
S. Obaiys +5 more
semanticscholar +1 more source
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
Journal of Computational and Applied Mathematics, 2018 In this paper, using the modified Adomian decomposition method, a novel fast scheme, has been presented, being interactive, to be used for solving a class of hypersingular integral equations of the first kind.
Reza Novin, M. A. Araghi, Y. Mahmoudi
semanticscholar +1 more source