نتایج جستجو برای: merging and splitting scheme

تعداد نتایج: 16858835  

Journal: :J. Sci. Comput. 2017
Heike Benninghoff Harald Garcke

In this paper, we introduce a novel parametric method for segmentation of three-dimensional images. We consider a piecewise constant version of the Mumford-Shah and the Chan-Vese functionals and perform a region-based segmentation of 3D image data. An evolution law is derived from energy minimization problems which push the surfaces to the boundaries of 3D objects in the image. We propose a par...

Journal: :Journal of physics 2022

Abstract In this work, we describe a new flux splitting method for an ideal MHD in the 3D curvilinear coordinate system. The is designed to create dissipation term by zero of split and central difference scheme MHD. Numerical tests are performed demonstrate accuracy capability capture complex waves

Journal: :ISPRS international journal of geo-information 2021

It is important to consider where, when, and how the evolution of sea surface temperature anomalies (SSTA) plays significant roles in regional or global climate changes. In comparison where there a great challenge clearly describing SSTA evolves space time. light from generation, through development, dissipation SSTA, this paper proposes novel approach identifying an time time-series raster dat...

Journal: :Journal of Differential Equations 2016

Journal: :The Egyptian International Journal of Engineering Sciences and Technology (Print) 2022

1997
Jean-Frédéric GERBEAU

Two semi-implicit methods based on the splitting of the Euler equations ux into uid and acoustic parts applied to low Mach number ows are presented. The rst method is based on the splitting of slow and fast eigenvalues of the jacobian matrix of the uxes and a semi-implicit scheme is constructed by introducing only the fast eigenvalues in the implicit matrices. The second method is based on the ...

2004
M A Singer S B Pope

We develop and demonstrate a computationally efficient numerical splitting technique for solving the reaction–diffusion equation. The scheme is based on the Strang splitting technique wherein the portions of the governing equations containing stiff chemical reaction terms are separated from those parts containing the less-stiff transport terms. As demonstrated, the scheme achieves second-order ...

Journal: :SIAM J. Numerical Analysis 2013
Jie Liu

We first prove the second order convergence of the Strang-type splitting scheme for the nonlinear Schrödinger equation. The proof does not require commutator estimates but crucially relies on an integral representation of the scheme. It reveals the connection between Strang-type splitting and the midpoint rule. We then show that the integral representation idea can also be used to study the sto...

Journal: :J. Comput. Physics 2013
Martina Bukac Suncica Canic Roland Glowinski Josip Tambaca Annalisa Quaini

We present a new model and a novel loosely coupled partitioned numerical scheme modeling fluid-structure interaction (FSI) in blood flow allowing non-zero longitudinal displacement. Arterial walls are modeled by a linearly viscoelastic, cylindrical Koiter shell model capturing both radial and longitudinal displacement. Fluid flow is modeled by the Navier-Stokes equations for an incompressible, ...

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