Results 41 to 50 of about 2,691 (96)
Numerical implementation of some reweighted path integral methods
, 2003 The reweighted random series techniques provide finite-dimensional approximations to the quantum density matrix of a physical system that have fast asymptotic convergence. We study two special reweighted techniques that are based upon the Levy-Ciesielski
Doll, J. D. +2 more
core +1 more source
Influence of Form and Structural Features of Open‐Cell Hybrid Foam on the Remanent Magnetic Scanning
Advanced Engineering Materials, Volume 27, Issue 12, June 2025.Simulations using an equivalent model are performed to improve the understanding of remanent magnetic scanning of hybrid foam samples for coating thickness estimation. The model allows to study the influence of isolated geometrical features such as layer thickness, boundary effects, as well as effects due to the statistical nature of the foams, which ...
Bashar Ibrahim +4 more
wiley +1 more source
Monolithic Newton‐Multigrid Finite Element Methods for the Simulation of Thixoviscoplastic Flows
International Journal for Numerical Methods in Fluids, Volume 97, Issue 4, Page 565-604, April 2025.ABSTRACT In this paper, we shall be concerned with the development, application, and numerical analysis of the monolithic Newton‐Multigrid finite element method (FEM) to simulate thixoviscoplastic (TVP) flows. We demonstrate the importance of robustness and efficiency of Newton‐Multigrid FEM solver for obtaining accurate solutions.
Naheed Begum +2 more
wiley +1 more source
Variational approach to multimode nonlinear optical fibers
Nanophotonics, Volume 14, Issue 6, Page 805-813, April 2025.Abstract We analyze the spatiotemporal solitary waves of a graded‐index multimode optical fiber with a parabolic transverse index profile. Using the nonpolynomial Schrödinger equation approach, we derive an effective one‐dimensional Lagrangian associated with the Laguerre–Gauss modes with a generic radial mode number p and azimuthal index m.
Francesco Lorenzi, Luca Salasnich
wiley +1 more source
Effective action of a five-dimensional domain wall
, 2009 We calculate the four-dimensional low-energy effective action for the perturbations of a two-scalar domain wall model in five dimensions. Comparison of the effective action to the Nambu-Goto action reveals the presence of an additional coupling between ...
K Zuleta +3 more
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Advances in Civil Engineering, Volume 2025, Issue 1, 2025.This paper presents a novel method for deriving shape functions of a nine‐node rectangular element based on solving the steady‐state heat conduction equation. Unlike traditional methods using Lagrange polynomials, this approach utilizes a linear combination of temperature distribution (TD) coefficients to extract second‐order shape functions for a one ...
Ramin Tabatabaei Mirhosseini +2 more
wiley +1 more source
Investigating the Influence of Petrophysical Parameter in Gravel Packing Sand Control Applications
Geofluids, Volume 2025, Issue 1, 2025.Gravel packing is a primary method for sand control in hydrocarbon wells, with its effectiveness primarily governed by gravel particle size and packing structure. Current gravel packing designs primarily rely on empirical engineering experience, while rock physics models for quantifying gravel packing permeability remain underdeveloped.
Jin Dai +8 more
wiley +1 more source
On the $16$-rank of class groups of $\mathbb{Q}(\sqrt{-2p})$ for primes $p \equiv 1 \bmod 4$
, 2017 We use Vinogradov's method to prove equidistribution of a spin symbol governing the $16$-rank of class groups of quadratic number fields $\mathbb{Q}(\sqrt{-2p})$, where $p \equiv 1 \bmod 4$ is a prime.Comment: 16 ...
Koymans, Peter, Milovic, Djordjo
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Criterion for Class Number of the Family Q254m2+m to be Greater Than or Equal to Three
Journal of Mathematics, Volume 2025, Issue 1, 2025.In this paper, we present an explicit lower bound for the class number of real quadratic field k=QD, where D = 25m2 + 4m is a square‐free integer and m ≡ 4 (mod 5) is an odd positive integer.
Ahmad Issa, Huadong Su
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A rational‐Chebyshev projection method for nonlinear eigenvalue problems
Numerical Linear Algebra with Applications, Volume 31, Issue 6, December 2024.Abstract This article describes a projection method based on a combination of rational and polynomial approximations for efficiently solving large nonlinear eigenvalue problems. In a first stage the nonlinear matrix function T(λ)$$ T\left(\lambda \right) $$ under consideration is approximated by a matrix polynomial in λ$$ \lambda $$.
Ziyuan Tang, Yousef Saad
wiley +1 more source