Results 31 to 40 of about 539,151 (294)

The spectral-element method in seismology [PDF]

open access: yes, 2005
We present the main properties of the spectral-element method, which is well suited for numerical calculations of synthetic seismograms for three-dimensional Earth models. The technique is based upon a weak formulation of the equations of motion and combines the flexibility of a finite-element method with the accuracy of a pseudospectral method.
Komatitsch, Dimitri   +2 more
openaire   +2 more sources

Wave propagation simulation in the upper core of sodium-cooled fast reactors using a spectral-element method for heterogeneous media

open access: yesEPJ Web of Conferences, 2018
ASTRID project, French sodium cooled nuclear reactor of 4th generation, is under development at the moment by Alternative Energies and Atomic Energy Commission (CEA).
Nagaso Masaru   +3 more
doaj   +1 more source

Seismic analysis of a I-sectioned steel frame based on an improved time-domain spectral element method

open access: yesJournal of Low Frequency Noise, Vibration and Active Control, 2023
An improved time-domain spectral element method (ITSEM) is developed for seismic analysis of I-sectioned steel structures in this paper. The developed method considers the effect of section type on spectral stiffness using shear correction coefficient ...
Dansheng Wang, Jingrong Chi
doaj   +1 more source

Edge Multiscale Methods for elliptic problems with heterogeneous coefficients

open access: yes, 2018
In this paper, we proposed two new types of edge multiscale methods motivated by \cite{GL18} to solve Partial Differential Equations (PDEs) with high-contrast heterogeneous coefficients: Edge spectral multiscale Finte Element method (ESMsFEM) and Wavelet-
Chung, Eric, Fu, Shubin, Li, Guanglian
core   +1 more source

Nonuniformly weighted Schwarz smoothers for spectral element multigrid

open access: yes, 2016
A hybrid Schwarz/multigrid method for spectral element solvers to the Poisson equation in $\mathbb R^2$ is presented. It extends the additive Schwarz method studied by J. Lottes and P. Fischer (J. Sci. Comput.
Stiller, Joerg
core   +1 more source

Penalty algorithm adapted for the spectral element discretization of the Darcy equations

open access: yesBoundary Value Problems, 2019
Any spectral element discretization of the Darcy problem can be efficiently solved by applying the penalty method. This method leads to a system of equations with uncoupled unknowns.
Mohamed Abdelwahed, Nejmeddine Chorfi
doaj   +1 more source

Spectral Element Method for Fractional Klein–Gordon Equations Using Interpolating Scaling Functions

open access: yesAdvances in Mathematical Physics, 2023
The focus of this paper is on utilizing the spectral element method to find the numerical solution of the fractional Klein–Gordon equation. The algorithm employs interpolating scaling functions (ISFs) that meet specific properties and satisfy the ...
Haifa Bin Jebreen
doaj   +1 more source

Mimetic Spectral Element Method for Anisotropic Diffusion [PDF]

open access: yes, 2018
This paper addresses the topological structure of steady, anisotropic, inhomogeneous diffusion problems. Two discrete formulations: a) mixed and b) direct formulations are discussed. Differential operators are represented by sparse incidence matrices, while weighted mass matrices play the role of metric-dependent Hodge matrices.
Gerritsma, Marc   +3 more
openaire   +3 more sources

Clinical Insights Into Hypercalcemia of Malignancy in Childhood

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Hypercalcemia of malignancy (HCM) is a rare but life‐threatening metabolic emergency in children that occurs in less than 1% of pediatric cancer cases, with a reported incidence ranging from 0.4% to 1.0% across different studies. While it is observed in 10%–20% of adult malignancies, pediatric HCM remains relatively uncommon.
Hüseyin Anıl Korkmaz
wiley   +1 more source

Hybrid Spectral Difference/Embedded Finite Volume Method for Conservation Laws [PDF]

open access: yes, 2015
A novel hybrid spectral difference/embedded finite volume method is introduced in order to apply a discontinuous high-order method for large scale engineering applications involving discontinuities in the flows with complex geometries.
Choi, Jung J.
core   +1 more source

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