Results 61 to 70 of about 29,809 (206)

Exercise‐induced calf muscle hyperemia: Rapid mapping of magnetic resonance imaging using deep learning approach

Physiological Reports, 2020
Exercise‐induced hyperemia in calf muscles was recently shown to be quantifiable with high‐resolution magnetic resonance imaging (MRI). However, processing of the MRI data to obtain muscle‐perfusion maps is time‐consuming.
Jeff L. Zhang, Christopher C. Conlin, Xiaowan Li, Gwenael Layec, Ken Chang, Jayashree Kalpathy‐Cramer, Vivian S. Lee   +6 more
doaj   +1 more source

Quantum Iterative Methods for Solving Differential Equations with Application to Computational Fluid Dynamics

Advanced Quantum Technologies, Volume 9, Issue 2, February 2026.
Quantum algorithms for differential equations are developed with applications in computational fluid dynamics. The methods follow an iterative simulation framework, implementing Jacobi and Gauss–Seidel schemes on quantum registers through linear combinations of unitaries.
Chelsea A. Williams, Antonio A. Gentile, Vincent E. Elfving, Daniel Berger, Oleksandr Kyriienko   +4 more
wiley   +1 more source

Multicanonical multigrid Monte Carlo method [PDF]

Physical Review E, 1994
To further improve the performance of Monte Carlo simulations of first-order phase transitions we propose to combine the multicanonical approach with multigrid techniques. We report tests of this proposition for the d-dimensional ${\mathrm{\ensuremath{\Phi}}}^{4}$ field theory in two different situations.
, Janke, , Sauer
openaire   +2 more sources

Physics‐Driven Deep Neural Networks for Solving the Optimal Transport Problem Associated With the Monge–Ampère Equation

CAAI Transactions on Intelligence Technology, Volume 11, Issue 1, Page 15-25, February 2026.
ABSTRACT Monge–Ampère equations (MAEs) are fully nonlinear second‐order partial differential equations (PDEs), which are closely related to various fields including optimal transport (OT) theory, geometrical optics and affine geometry. Despite their significance, MAEs are extremely challenging to solve.
Xinghua Pan, Zexin Feng, Kang Yang
wiley   +1 more source

Extended local fourier analysis for multigrid optimal smoothing, coarse grid correction, and preconditioning [PDF]

, 2001
Multigrid methods are fast iterative solvers for partial di erential equations. Especially for elliptic equations they have been proven to be highly e cient.
Wienands, Roman
core  

A Direct Elliptic Solver Based on Hierarchically Low-rank Schur Complements

, 2016
A parallel fast direct solver for rank-compressible block tridiagonal linear systems is presented. Algorithmic synergies between Cyclic Reduction and Hierarchical matrix arithmetic operations result in a solver with $O(N \log^2 N)$ arithmetic complexity ...
A. Aminfar, B.L. Buzbee, I. Ibragimov, J. Xia, J. Xia, J. Xia, L. Grasedyck, P. Amestoy, P. Swarztrauber, P.G. Schmitz, P.G. Schmitz, R.W. Hockney, S. Ambikasaran, S. Chandrasekaran   +13 more
core   +1 more source

On the Rotation‐Induced Pressure‐Strain Correlation in Rotating Boundary Layer Flows

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Rotation is a fundamental feature of many weather systems. The pressure‐strain correlation plays an important role in the Reynolds stress budget. However, the behavior of the pressure‐strain correlation under rotation remains insufficiently explored. This study develops a closure model for the rotation‐induced pressure‐strain correlation.
Xin Shao, Ning Zhang
wiley   +1 more source

Large Scale Electronic Structure Calculations with Multigrid Acceleration

, 1995
We have developed a set of techniques for performing large scale ab initio calculations using multigrid accelerations and a real-space grid as a basis. The multigrid methods permit efficient calculations on ill-conditioned systems with long length scales
A. Brandt, A. Brandt, C. Kittel, D. J. Sullivan, D. W. Brenner, E. L. Briggs, F. Mauri, G. Galli, I. Stich, J. Bernholc, J. Bernholc, J. R. Chelikowsky, J. R. Chelikowsky, J. Tersoff, J. Tersoff, J. Tersoff, K. D. Brommer, M. C. Payne, P. Bogusławski, P. Ordejón, T. A. Arias, T. A. Arias, W. E. Pickett, W. L. Briggs, X. Jing   +24 more
core   +1 more source

Effects of Triangular Nozzle Geometry on the Deformation and Breakup of Liquid Jets in Crossflow

Chemical Engineering &Technology, Volume 49, Issue 1, January 2026.
This study numerically investigates the deformation and breakup of liquid jets in air crossflow from triangular and circular nozzles using Newtonian and shear‐thinning fluids. The analysis highlights how non‐circular geometry and rheology jointly govern jet instability through variations in viscosity, pressure, and energy transfer. The findings advance
Yasuhiro Saito, Shota Nakashima, Ayuki Minami   +2 more
wiley   +1 more source

A regional implementation of a mixed finite‐element, semi‐implicit dynamical core

Quarterly Journal of the Royal Meteorological Society, Volume 152, Issue 774, January 2026 Part A.
A regional version of a new dynamical core with an iterated semi‐implicit time discretisation and mixed finite‐element spatial discretisation is described. This involves modifying the mixed‐system and Helmholtz‐preconditioner equations to use lateral boundary condition (LBC) data specified by a driving model.
Christine Johnson, Ben Shipway, Thomas Melvin, Thomas Bendall, James Kent, Ian Boutle, Alex Brown, Mohamed Zerroukat, Benjamin Buchenau, Nigel Wood   +9 more
wiley   +1 more source