Results 71 to 80 of about 12,853 (184)
Performance of algebraic multigrid methods for non-symmetric matrices arising in particle methods
, 2009 Large linear systems with sparse, non-symmetric matrices arise in the modeling of Markov chains or in the discretization of convection-diffusion problems.
Seibold, Benjamin
core
Hierarchically Guided Residual-Aware Equalization for Orthogonal Time Frequency Space Modulation
IEEE AccessWith 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
Multilevel Space-Time Aggregation for Bright Field Cell Microscopy Segmentation and Tracking
International Journal of Biomedical Imaging, 2010 A multilevel aggregation method is applied to the problem of segmenting live cell bright field microscope images. The method employed is a variant of the so-called “Segmentation by Weighted Aggregation” technique, which itself is based on Algebraic ...
Tiffany Inglis +6 more
doaj +1 more source
Reducing complexity of algebraic multigrid by aggregation
Numerical Linear Algebra with Applications, 2016 SummaryA typical approach to decrease computational costs and memory requirements of classical algebraic multigrid methods is to replace a conservative coarsening algorithm and short‐distance interpolation on a fixed number of fine levels by an aggressive coarsening with a long‐distance interpolation.
Gratton, Serge +3 more
openaire +4 more sources
Review on solving the forward problem in EEG source analysis
Journal 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
On Optimal Algebraic Multigrid Methods
, 2019 In this note we present an alternative way to obtain optimal interpolation operators for two-grid methods applied to Hermitian positive definite linear systems. Falgout and Vassilevski in [SIAM J. Numer. Anal, 42 (2004), pp. 1669-1693] and Zikatanov [Numer. Linear Algebra Appl., 15 (2008), pp.
Ramos, Luis García, Nabben, Reinhard
openaire +2 more sources
Advances 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
Algebraic multigrid support vector machines
, 2016 The support vector machine is a flexible optimization-based technique widely used for classification problems. In practice, its training part becomes computationally expensive on large-scale data sets because of such reasons as the complexity and number of iterations in parameter fitting methods, underlying optimization solvers, and nonlinearity of ...
Sadrfaridpour, Ehsan +5 more
openaire +2 more sources
Frontiers in Earth ScienceZTEM (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]
Учёные 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