Results 81 to 90 of about 481 (184)

Hierarchically Guided Residual-Aware Equalization for Orthogonal Time Frequency Space Modulation

open access: yesIEEE Access
With the growing demand for high-mobility next-generation wireless environment, Orthogonal Time Frequency Space (OTFS) has emerged as the best transformative modulation technique due to its unique potential to provide reliable next-generation ...
B. M. Bergyl Jeslin, T. Deepa
doaj   +1 more source

Review on solving the forward problem in EEG source analysis

open access: yesJournal of NeuroEngineering and Rehabilitation, 2007
Background The aim of electroencephalogram (EEG) source localization is to find the brain areas responsible for EEG waves of interest. It consists of solving forward and inverse problems.
Vergult Anneleen   +10 more
doaj   +1 more source

A computational fluid dynamics investigation of the flow behavior near a wellbore using three-dimensional Navier–Stokes equations

open access: yesAdvances in Mechanical Engineering, 2019
The analysis of fluid flow near the wellbore region of a hydrocarbon reservoir is a complex phenomenon. The pressure drop and flow rates change in the near wellbore with time, and the understanding of this system is important.
Mohammad Jalal Ahammad   +3 more
doaj   +1 more source

Studies of three dimensional stagged-grid finite difference for Z-axis tipper electromagnetic numerical simulation

open access: yesFrontiers in Earth Science
ZTEM (Z-Axis Tipper Electromagnetic System) is a frequency-domain airborne electromagnetic exploration method that utilizes natural field sources. This method is highly efficient and capable of probing great depths, making it widely applicable in the ...
Yu Wang   +4 more
doaj   +1 more source

Numerical Simulation of One-Phase Flow to Multi-Stage Hydraulically Fractured Horizontal Well [PDF]

open access: yesУчёные записки Казанского университета: Серия Физико-математические науки, 2016
This paper presents a method of numerical simulation of one-phase flow near multi-stage fractured horizontal well in oil reservoir. Differential models for flows within reservoir and within fractures are formulated separately on the basis of Darcy's law.
M.R. Khamidullin
doaj  

PRECONDITIONING OF VOXEL FEM ELLIPTIC SYSTEMS

open access: yesTASK Quarterly, 2007
The presented comparative analysis concerns two iterative solvers for large-scale linear systems related to µFEM simulation of human bones. The considered scalar elliptic problems represent the strongly heterogeneous structure of real bone specimens ...
SVETOZAR MARGENOV, YAVOR VUTOV
doaj  

Recent developments on electron optics simulator

open access: yesAIP Advances
Recent developments on the electron optics simulator (EOS) are reported in this paper. The EOS is a finite element two-dimensional (2D) and three-dimensional (3D) electrostatic particle steady-state trajectory code that has been widely used for beam ...
Xiaobing Wang   +6 more
doaj   +1 more source

A modified algebraic multigrid algorithm for a class of elliptic variational inequalities and parallization(一类椭圆型变分不等式的修正代数多重网格解法及并行计算)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2010
提出了一种修正的代数多重网格解法,来求解具有对称二阶椭圆算子的变分不等式的有限元离散问题.该方法基于离散椭圆型变分不等方程的线性互补性,运用积极集策略,对Gauss-Sidel光滑迭代后的近似解进行一个后处理,以满足不等式约束,从而解决了标准代数多重网格法在求解自适应网格上的变分不等式时不收敛的问题.数值实验表明了该算法在一致网格和h-自适应网格上的计算有效性和健壮性.为了减少计算时间,根据该修正算法内在的并行度,提出了一个并行计算格式,数值结果给出了该并行的加速比和效率.
LIWei(李蔚)
doaj   +1 more source

Goal-oriented adaptive finite element methods with optimal computational complexity. [PDF]

open access: yesNumer Math (Heidelb), 2023
Becker R   +3 more
europepmc   +1 more source

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