Results 131 to 140 of about 5,501 (303)
AxiomsIn this paper, we propose an efficient numerical method to solve the problems of diffusive logistic models with free boundaries, which are often used to simulate the spreading of new or invasive species.
Chunyan Zhang, Yuanyang Qiao
doaj +1 more source
Boundary Treatment for a Cartesian Grid Method
, 1996 SAM Research Report, 1996 ...
openaire +2 more sources
Experimental characterization of the flow and turbulence generated by fractal oscillating grids [PDF]
International audienceInspired from the existing literature on fractal grids in channels and as an extension to classical oscillating grid experiments with simple Cartesian grids, an original investigation of fractal oscillating grid turbulence is here ...
Thomas, Diane +4 more
core +1 more source
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose To demonstrate the synergy of undersampled radial 2in1‐RARE‐EPI acquisition and nonlinear model‐based reconstruction for accelerated and simultaneous T2, T2*, and R2′ mapping in brains of patients with multiple sclerosis (MS). Methods 2in1‐RARE‐EPI combines a RARE module with an EPI module to capture T2 and T2* information.
Jose Raul Velasquez Vides +16 more
wiley +1 more source
The Astrophysical Journal Supplement SeriesEntity is a new-generation, fully open-source particle-in-cell (PIC) code developed to overcome key limitations in astrophysical plasma modeling, particularly the extreme separation of scales and the performance challenges associated with evolving, GPU ...
Hayk Hakobyan +11 more
doaj +1 more source
Laterally Oscillating Trajectory for Undersampling Slices: LOTUS
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose While spiral sampling offers SNR advantages for diffusion MRI, its acceleration with simultaneous multislice remains relatively unexplored. This study introduces Laterally Oscillating Trajectory for Undersampling Slices (LOTUS), which is a 3D spiral‐like k‐space trajectory that aims to minimize g‐factor via controlled incoherent ...
Mayuri Sothynathan +2 more
wiley +1 more source
Cartesian Grid Adaption in CFD
, 1998 We present a single block adaption strategy for 3-D cartesian grids. The adaption process proceeds as an interface with the PHOENICS package. It allows continuous runs or unsteady calculations by reconstructing the interpolated solution on the new mesh at each adaption step.
openaire +1 more source
Efficient Fluid Dynamic Design Optimization Using Cartesian Grids
, 2004 This report is subdivided in three parts. The first one reviews a new approach to the computation of inviscid flows using Cartesian grid methods. The crux of the method is the curvature-corrected symmetry technique (CCST) developed by the present authors
Dadone, A., Sellers, Bill, Grossman, B.
core
A Ghost Cell Method for Turbulent Compressible Viscous Flows on Adaptive Cartesian Grids
, 2013 The aim of this paper is to present a new ghost cell turbulent wall boundary condition to simulate high Reynolds number compressible viscous flows on adaptive Cartesian grids.
Hu, O., Zhao, N., Liu, J.M.
core +1 more source
Magnetic Resonance in Medicine, EarlyView.ABSTRACT Purpose To enable flexible dynamic and DCE MRI with low acoustic noise and high spatiotemporal resolution using zero echo time (ZTE) imaging. Methods This work proposes Arc‐ZTE, a technique in which the readout gradients of ZTE are continuously‐slewed to form arcs in k‐space that are sequentially rotated to yield an incoherent trajectory ...
Shreya Ramachandran +5 more
wiley +1 more source