Results 21 to 30 of about 579,530 (193)

The ALE-method with triangular elements: direct convection of integration point values [PDF]

, 2000
The arbitrary Lagrangian-Eulerian (ALE) finite element method is applied to the simulation of forming processes where material is highly deformed. Here, the split formulation is used: a Lagrangian step is done with an implicit finite element formulation,
Huetink, Han, Stoker, H.C., van den Boogaard, Antonius H., van Haaren, M.J., van Haaren, M.J.   +4 more
core   +2 more sources

Normal‐Appearing White Matter Injury Mediates Chronic Deep Venous Hypoxia and Disease Progression in Multiple Sclerosis

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective To explore how cerebral hypoxia and Normal‐Appearing White Matter (NAWM) integrity affect MS lesion burden and clinical course. Methods Seventy‐nine MS patients, including 13 clinically isolated syndrome (CIS) patients and 66 relapsing–remitting multiple sclerosis (RRMS) patients, and 44 healthy controls (HCs) were recruited from ...
Xinli Wang, Huiying Wang, Zhizheng Zhuo, Ai Guo, Ke Lv, Decai Tian, Chao Chai, Yunyun Duan, Shuang Xia   +8 more
wiley   +1 more source

Finite size scaling for quantum criticality using the finite-element method

, 2012
Finite size scaling for the Schr\"{o}dinger equation is a systematic approach to calculate the quantum critical parameters for a given Hamiltonian. This approach has been shown to give very accurate results for critical parameters by using a systematic ...
B. Widom, Birgit Wehefritz-Kaufmann, D. W. Pepper, Edwin Antillon, G. Giuliani, J. L. Cardy, J. M. Thijssen, L. D. Landau, L. R. Ram-Mohan, M. E. Fisher, M. N. Barber, S. Sachdev, Sabre Kais, V. Privman, W. Schweizer   +14 more
core   +1 more source

eXtended hybridizable discontinuous Galerkin for incompressible flow problems with unfitted meshes and interfaces [PDF]

, 2018
The eXtended hybridizable discontinuous Galerkin (X-HDG) method is developed for the solution of Stokes problems with void or material interfaces. X-HDG is a novel method that combines the hybridizable discontinuous Galerkin (HDG) method with an eXtended
Fernández Méndez, Sonia, Gürkan, Ceren, Kronbichler, Martin   +2 more
core   +2 more sources

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source

A 2.5D BEM-FEM using a spectral approach to study scattered waves in fluid–solid interaction problems [PDF]

, 2019
42nd International Conference on Boundary Elements and other Mesh Reduction Methods, BEM/MRM 2019; ITeCons-University of Coimbra, Coimbra; Portugal; 2 July 2019 through 4 July 2019.
Cruz Muñoz, Juan, Galvín, Pedro, Romero Ordóñez, Antonio, Tadeu, Antònio   +3 more
core   +1 more source

Extended finite element method for electromagnetic fields [PDF]

2015 IEEE International Conference on Applied Superconductivity and Electromagnetic Devices (ASEMD), 2015
This paper presents the fundamental principle of the extended finite element method (XFEM) for electromagnetic field analysis. This method provides an accurate approximation for locally non-smooth features within finite elements, such as singularities, discontinuities, and high derivatives.
Na Na Duan, Wei Jie Xu, Shu Hong Wang, Hai Lin Li, You Guang Guo, Jian Guo Zhu   +5 more
openaire   +1 more source

A Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller

International Journal of Adaptive Control and Signal Processing, EarlyView.
Block Diagram of the Robust Adaptive One‐Sample‐Ahead Preview Super‐Twisting Sliding Mode Controller. ABSTRACT This article introduces a discrete‐time robust adaptive one‐sample‐ahead preview super‐twisting sliding mode controller. A stability analysis of the controller by Lyapunov criteria is developed to demonstrate its robustness in handling both ...
Guilherme Vieira Hollweg, Paulo Jefferson Dias de Oliveira Evald, Shivam Chaturvedi, Hilton Abilio Gründling, Rodrigo Varella Tambara, Wencong Su   +5 more
wiley   +1 more source

A narrow-band unfitted finite element method for elliptic PDEs posed on surfaces [PDF]

, 2015
The paper studies a method for solving elliptic partial differential equations posed on hypersurfaces in $\mathbb{R}^N$, $N=2,3$. The method allows a surface to be given implicitly as a zero level of a level set function.
Olshanskii, Maxim A., Safin, Danil
core  

Adhesive Contact to a Coated Elastic Substrate [PDF]

, 2007
We show how the quasi-analytic method developed to solve linear elastic contacts to coated substrates (Perriot A. and Barthel E. {\em J. Mat. Res.}, {\bf 2004}, {\em 19}, 600) may be extended to adhesive contacts. Substrate inhomogeneity lifts accidental
A Perriot, Barthel E, Derjaguin B, E Barthel, Gladwell G M L, Greenwood J A, Greenwood J A, Huguet A S, Irwin G R, Johnson K L, Johnson K L, Mary P, Maugis D, Maugis D, Maugis D, Mencik J, Sperling G, Sridhar I, Ting T C T   +18 more
core   +2 more sources