Results 71 to 80 of about 559 (266)

Fast Calculation for the Flow and Heat Transfer of Tempered Fractional Maxwell Viscoelastic Fluid

International Journal for Numerical Methods in Fluids, EarlyView.
This study develops a tempered fractional Maxwell model to simulate unsteady thermal flow in viscoelastic fluids, capturing key rheological behaviors. A fast SOE‐based algorithm is proposed to improve the computational efficiency of the numerical scheme. Results reveal how key parameters influence fluid motion and heat transfer, demonstrating the model'
Yi Liu, Mochen Jiang, Libo Feng
wiley   +1 more source

Sampling, Marcinkiewicz–Zygmund inequalities, approximation, and quadrature rules [PDF]

Journal of Approximation Theory, 2020
Given a sequence of Marcinkiewicz-Zygmund inequalities in $L^2$, we derive approximation theorems and quadrature rules. The derivation is completely elementary and requires only the definition of Marcinkiewicz-Zygmund inequality, Sobolev spaces, and the solution of least square problems.
openaire   +2 more sources

Edge‐Based Discretizations on Triangulations in Any Dimension, With Special Attention to Four‐Dimensional Space

International Journal for Numerical Methods in Fluids, EarlyView.
This article provides important geometric formulas for node‐centered, edge‐based schemes in any number of dimensions. These formulas are noteworthy, as they do not require the explicit formation of dual regions. We prove several key geometric results, with a particular focus on the four‐dimensional case, due to potential space‐time applications ...
Nicholas Tufillaro, David M. Williams, Hiroaki Nishikawa   +2 more
wiley   +1 more source

Gaussian process quadratures in nonlinear sigma-point filtering and smoothing [Elektronisk resurs]

, 2014
This paper is concerned with the use of Gaussian process regression based quadrature rules in the context of sigma-point-based nonlinear Kalman filtering and smoothing.
Svensson, Lennart,, Sandblom, Fredrik,, Särkkä, S.,, Hartikainen, J.,   +3 more
core  

Sparsity of Runge-Kutta convolution weights for the three-dimensional wave equation

, 2014
Wave propagation problems in unbounded homogeneous domains can be formulated as time-domain integral equations. An effective way to discretize such equations in time are Runge-Kutta based convolution quadratures.
Kachanovska, Maryna, Banjai, Lehel; id_orcid   +1 more
core   +1 more source

Longitudinal 1H and 129Xe Lung MRI in Patients With Post‐COVID Residual Lung Abnormalities

Journal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT Background It is unclear how lung function may recover in patients with residual lung abnormalities (RLAs) following COVID‐19 pneumonia. Purpose To evaluate lung function trends over time in patients with RLAs following hospitalization due to COVID‐19. Study Type Prospective, multicenter longitudinal cohort study.
Laura C. Saunders, Guilhem J. Collier, Laurie J. Smith, Ho‐Fung Chan, Paul J. C. Hughes, Scarlett Strickland, Lotta Gustafsson, Thomas Newman, Megan Plowright, Zoë Gabriel, Lily M. Pearce, James T. Grist, Kher Lik Ng, Arthur Harrison, Charlotte E. Bolton, Jody Bray, Helen Marshall, Graham Norquay, Alberto M. Biancardi, Jimmy E. Ball, Neil J. Stewart, Kevin M. Johnson, Andrew J. Swift, Smitha Rajaram, John Blaikley, Stefan Stanel, Paul J. Collini, Gary H. Mills, Rod Lawson, Jonathan Brooke, Amanda T. Goodwin, Iain D. Stewart, Ling‐Pei Ho, Joseph Jacob, Thomas Meersmann, Galina E. Pavlovskaya, Fergus Gleeson, Ian P. Hall, Gisli Jenkins, Jim M. Wild, A. A. Roger Thompson, on behalf of the UK‐ILD consortium   +41 more
wiley   +1 more source

Advances in Position‐Momentum Entanglement: A Versatile Tool for Quantum Technologies

Laser &Photonics Reviews, EarlyView.
Position–momentum entanglement constitutes a high‐dimensional continuous‐variable resource in quantum optics. Recent advances in its generation, characterization, and control are reviewed, with emphasis on spontaneous parametric down‐conversion and modern measurement techniques.
Satyajeet Patil, Rajshree Swarnkar, Jonas L. Moos, Sebastian Töpfer, Sergio Tovar‐Pérez, Jorge Fuenzalida, Markus Gräfe   +6 more
wiley   +1 more source

The Chebyshev spectral element approximation with exact quadratures

Journal of Computational and Applied Mathematics, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Li, Yibiao, Li, X. K.
openaire   +3 more sources

Ultrahigh‐Order Harmonic Mode‐Locked Optoelectronic Oscillator

Laser &Photonics Reviews, EarlyView.
This article demonstrates a record‐breaking microwave frequency comb generator using an ultrahigh‐harmonic‐order mode‐locked optoelectronic oscillator. By integrating dual recirculating loops into a low‐coherence system, the researchers achieved a harmonic order of 956 with superior noise suppression.
Zhuoran Wang, Santiago Bernal, David V. Plant, Lawrence R. Chen   +3 more
wiley   +1 more source

Comparison of time and spatial collocation methods for the heat equation

, 2003
We combine a high-order compact finite difference scheme to approximate the spatial derivatives and collocation techniques for the time component to numerically solve the two-dimensional heat equation.
Kouatchou, Jules
core   +1 more source