Results 51 to 60 of about 571 (177)

Systematic Review of Phase Aberration Correction Algorithms for Transcranial Focused Ultrasound

iRADIOLOGY, Volume 3, Issue 1, Page 26-46, February 2025.
Transcranial focused ultrasound (tFUS) is an emerging non‐invasive technique for treating brain disorders. However, the skull induces substantial aberrations in the acoustic field, distorting the ultrasound focus and compromising treatment efficacy. The present report offers a comprehensive overview and comparison of various phase correction algorithms,
Mingyu Wang, Zhouyang Xu, Bingbing Cheng
wiley   +1 more source

Convergence of the pseudospectral method for the Ginzburg-Landau equation

, 1990
The convergence of the pseudospectral (Fourier) method for the Ginzburg-Landau equation in nonlinear wave theory is proved.
Yang, Yisong
core   +1 more source

Effects of Chain Dispersity on the Stability of Frank–Kasper Phases Self‐Assembled from Diblock Copolymers

Macromolecular Chemistry and Physics, Volume 226, Issue 3, February 2025.
The relative stability of Frank–Kasper phases self‐assembled from AB diblock copolymers is enhanced by the dispersity of the core‐forming A‐blocks. Abstract The effect of chain dispersity on the relative stability of Frank–Kasper (FK) phases self‐assembled from diblock copolymers (DBCPs) is studied using self‐consistent field theory applied to DBCPs ...
Chi To Lai, An‐Chang Shi
wiley   +1 more source

Hybrid Fourier pseudospectral/discontinuous Galerkin time-domain method for arbitrary boundary conditions

, 2017
The wave-based Fourier Pseudospectral time-domain (Fourier-PSTD) method was shown to be an effective way of modeling outdoor acoustic propagation problems as described by the linearized Euler equations (LEE), but is limited to real-valued frequency ...
Raúl Pagán Muñoz, Pagan Munoz, R., Maarten Hornikx, Hornikx, M.C.J.   +3 more
core   +1 more source

Acoustic propagation modeled by the curvilinear Fourier pseudospectral time-domain method [PDF]

Proceedings of Meetings on Acoustics, 2013
The Fourier pseudospectral time-domain method is an efficient domain-discretization wave-based method to model sound propagation in inhomogeneous bounded media. The method was successfully applied to model atmospheric sound propagation and acoustics in urban environments.
Maarten Hornikx, Daan Steeghs
openaire   +1 more source

Spectral Flux Decomposition in a Wind‐Driven Channel Flow With Near‐Inertial Waves

Journal of Advances in Modeling Earth Systems, Volume 17, Issue 1, January 2025.
Abstract In recent years it has become evident that the spatiotemporal distribution of oceanic kinetic energy (KE) is strongly influenced by the interactions between oceanic mesoscale eddies, submesoscale currents, and near‐inertial waves (NIWs). However, the proposed interaction mechanisms remain difficult to evaluate and quantify in complex oceanic ...
Michal Shaham, Roy Barkan
wiley   +1 more source

A Simple and Effective Second‐Order Numerical Algorithm for Tempered Fractional Differential Equation With Time Caputo‐Tempered Fractional Derivative

Advances in Mathematical Physics, Volume 2025, Issue 1, 2025.
This paper presents an efficient numerical scheme for the space–time tempered fractional convection–diffusion equation, where the time derivative is the Caputo‐tempered fractional derivative and the space derivatives are the normalized left and right Riemann–Liouville tempered fractional derivatives.
Dechao Gao, Zeshan Qiu, Lizan Wang, Jianxin Li, Shikha Binwal   +4 more
wiley   +1 more source

Fourier-Chebyshev pseudospectral method for two-dimensional vorticity equation

Numerische Mathematik, 1993
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Guo, Ben-yu, Li, Jian
openaire   +1 more source

S‐2DV: A New Reduced Model Generating Submesoscale‐Like Flows

Journal of Advances in Modeling Earth Systems, Volume 16, Issue 12, December 2024.
Abstract Oceanic mesoscale flows are characterized by an inverse kinetic energy cascade and the subsequent formation of large coherent vortices, and these flow features are captured well by the quasi‐geostrophic (QG) model. Oceanic submesoscale flow dynamics are however significantly different from those of mesoscales. The increase in unbalanced energy
Krithin Gowthaman, Jim Thomas
wiley   +1 more source

Numerical Solution of Nonlinear Periodic Optimal Control Problems Using a Fourier Integral Pseudospectral Method

, 2023
This paper presents a Fourier integral pseudospectral (FIPS) method for a general class of nonlinear, periodic optimal control (OC) problems with equality and/or inequality constraints and sufficiently smooth solutions.
Elgindy, Kareem T.
core