Results 11 to 20 of about 345,546 (151)

On maximally inflected hyperbolic curves [PDF]

open access: yes, 2014
In this note we study the distribution of real inflection points among the ovals of a real non-singular hyperbolic curve of even degree. Using Hilbert's method we show that for any integers $d$ and $r$ such that $4\leq r \leq 2d^2-2d$, there is a non ...
Arroyo, Aubin   +2 more
core   +4 more sources

Regularized singular boundary method for groundwater flow in a cofferdam

open access: yesMATEC Web of Conferences, 2018
The boundary integral methods form one group of methods for solving differential equations. The boundary element method (BEM) is the basic method of this group.
Mužík Juraj, Bulko Roman
doaj   +1 more source

Precorrected-FFT Accelerated Singular Boundary Method for High-Frequency Acoustic Radiation and Scattering

open access: yesMathematics, 2022
This paper presents a precorrected-FFT (pFFT) accelerated singular boundary method (SBM) for acoustic radiation and scattering in the high-frequency regime.
Weiwei Li, Fajie Wang
doaj   +1 more source

Highly accurate special quadrature methods for Stokesian particle suspensions in confined geometries

open access: yes, 2020
Boundary integral methods are highly suited for problems with complicated geometries, but require special quadrature methods to accurately compute the singular and nearly singular layer potentials that appear in them.
Bagge, Joar, Tornberg, Anna-Karin
core   +1 more source

An enhanced BEM approach applied to potential problems: a comparative study [PDF]

open access: yesNumerical Methods in Civil Engineering, 2020
In the present paper, a hybrid analytical/numerical method capable of integrating singular logarithmic functions, as an essential part of the Boundary Element Method (BEM) process, is presented.
Parham Azhir   +3 more
doaj   +1 more source

Modified Differential Transform Method for Two Singular Boundary Values Problems

open access: yesJournal of Applied Mathematics, 2014
This paper deals with the two singular boundary values problems of second order. Two singular points are both boundary values points of the differential equation.
Yinwei Lin   +2 more
doaj   +1 more source

A Simple and Efficient Regularization Method for 3D BEM: Application to Frequency-Domain Elastodynamics [PDF]

open access: yes, 2005
An efficient and easy-to-implement method is proposed to regularize integral equations in the 3D boundary element method (BEM). The method takes advantage of an assumed three-noded triangle discretization of the boundary surfaces.
Dangla, Patrick   +3 more
core   +6 more sources

An improved version of artificial boundary node approach

open access: yesComputer Assisted Methods in Engineering and Science, 2022
This paper proposes an improvement of the artificial boundary node approach using the least square method. The original artificial boundary node approach requires the selection of an offset by the user.
Bahattin Kanber
doaj  

A Numerical Method for Singular Two Point Boundary Value Problems [PDF]

open access: yes, 1977
The numerical solution of boundary value problems for linear systems of first order equations with a regular singular point at one endpoint is considered.
Brabston, D. C., Keller, H. B.
core   +1 more source

Quasilinearization method and nonlocal singular three point boundary value problems

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2009
The method of upper and lower solutions and quasilinearization for nonlinear singular equations of the type $$-x''(t) +\lambda x'(t)= f(t,x(t)),\,t\in (0,1),$$ subject to nonlocal three-point boundary conditions $$x(0)=\delta x(\eta),\quad x(1)=0, \quad ...
Rahmat Khan
doaj   +1 more source

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