Results 91 to 100 of about 1,730 (224)
An Augmented Lagrangian Preconditioner for Navier–Stokes Equations With Runge–Kutta in Time
Numerical Linear Algebra with Applications, Volume 33, Issue 3, June 2026.ABSTRACT We consider an implicit Runge–Kutta method for the numerical time integration of the nonstationary incompressible Navier–Stokes equations. This yields a sequence of nonlinear problems to be solved for the stages of the Runge–Kutta method. The resulting nonlinear system of differential equations is discretized using a finite element method.
Santolo Leveque +2 more
wiley +1 more source
IEEE AccessReconfigurable Intelligent Surfaces (RIS) are emerging as a key enabler for future wireless networks, offering cost-effective solutions to enhance coverage, improve energy efficiency, and support ultra-reliable communications.
Irina Isabel Salazar Argoti +3 more
doaj +1 more source
OPTIMAL QUADRATURE FORMULA WITH DERIVATIVE
International Journal of Applied MathematicsThis article is devoted to the construction of optimal quadrature formulas with derivative in the space of differentiable functions using the Sobolev method. This quadrature formula consists of a linear combination of the values of the interval up to the second derivative of the function at all nodes.
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CONSTRUCTION OF OPTIMAL QUADRATURE FORMULAS IN SOBOLEV SPACE.
, 2023 In this article, a series of problems related to the creation and application of quadrature and cubature formulas, including: finding errors of quadrature and cubature formulas in the Gilbert phases of differential functions; calculating error functionals of found extremal functions using extremal functions; finding the conditions for the existence and
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This article presents the derivation and analysis of a weighted optimal quadrature formula in the Hilbert space (2,1)2 W (0,1). The quadrature formula is expressed as a linear combination of function values and their first-order derivatives at ...
Hayotov, А.R., Babaev, S.S.
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Quadrature formulas for calculating the hadamard integral of a special form [PDF]
, 2016 © 2016, International Journal of Pharmacy and Technology. All rights reserved.Currently, the issues related to finding solutions to some economic problems, such as problems pertaining to the queuing systems are of great interest. These problems, in turn,
Galimyanov A. +3 more
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Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 2, June 2026.ABSTRACT In this work, we present an anisotropic multi‐goal error control based on the dual weighted residual (DWR) method for time‐dependent convection–diffusion–reaction (CDR) equations. Motivated by former work, we combine multiple goals to single error functionals with weights chosen as algorithmic parameters.
Markus Bause +5 more
wiley +1 more source
. This work is devoted to the process of constructing an optimal quadrature formula with derivative in the sense of Sard in the Hilbert space of periodic and complex-valued functions for numerical calculation of Fourier integrals.
Nutfullaeva , A.Kh. +2 more
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Quantum Information Measures of a Dirichlet Waveguide with Neumann Window(s)
Advanced Quantum Technologies, Volume 9, Issue 6, June 2026.ABSTRACT Engineering boundary conditions in low‐dimensional structures provides a simple yet powerful way of shaping how quantum information is stored and transported. We investigate a flat 2D Dirichlet waveguide containing one or two finite Neumann windows and compute the bound states in both position and momentum space as functions of the window ...
Firoz Chogle, Berihu Teklu
wiley +1 more source
Opto-Electronic ScienceComplex-valued double-sideband direct detection (DD) can reconstruct the optical field and achieve a high electrical spectral efficiency (ESE) comparable to that of a coherent homodyne receiver, and DD does not require a costly local oscillator laser ...
Xingfeng Li +7 more
doaj +1 more source