نتایج جستجو برای: phase field method

تعداد نتایج: 2762607  

Journal: :basic and clinical neuroscience 0
mohammad javad soltanzadeh neuroscience research laboratory, biomedical engineering department, faculty of electrical engineering, iran university of science and technology (iust), tehran, iran. mohammad reza daliri mohammad reza daliri

introduction: direction and latency of electrical connectivity between different sites of brain explains brain neural functionality. we compared efficiency of cross correlation and phase locking methods in time lag estimation which are based on local field potential (lfp) and lfpspike signals, respectively. methods: signals recorded from mt area of a macaque’s brain was used in a simulation app...

فربد, منصور, زرگرشوشتری, مرتضی , پورمقدم, امیر ,

In this article, the Zn1-xNixO nanoparticles with x= 0, 0.01, 0.02, 0.03, 0.04, 0.05, 0.08 and 0.1 have been produced by mechanochemical method. To investigate the structural, morphological, optical and magnetic properties of the samples, the X-ray diffraction, field emission scanning electron microscope, UV-visible spectroscopy, photoluminescence and vibrating sample magnetometer have been use...

Journal: :Journal of Computational Physics 2022

In this paper, we present an efficient numerical algorithm for solving the time-dependent Cahn–Hilliard–Navier–Stokes equations that model flow of two phases with different densities. The pressure-correction step in projection method consists a Poisson problem modified right-hand side. Spatial discretization is based on discontinuous Galerkin methods piecewise linear or quadratic polynomials. O...

Journal: :Journal of Computational Physics 2021

We present a finite element based variational interface-preserving and conservative phase-field formulation for the modeling of incompressible two-phase flows with surface tension dynamics. The preservation hyperbolic tangent interface profile convective Allen-Cahn relies on novel time-dependent mobility model. coefficient is adjusted adaptively as function gradients velocity order parameter in...

2001
Eugene Paperno Ichiro Sasada Eduard Leonovich

The method is based on two-axis generation of a quasi-static rotating magnetic field and three-axis sensing. Two mutually orthogonal coils fed with phase-quadrature currents comprise the excitation source, which is equal to a mechanically rotating magnetic dipole. The resulting excitation field rotates elliptically at any position in the near-field region. The ac part of the squared field magni...

Journal: :نشریه دانشکده فنی 0
کریم عباس زاده دانشگاه خواجه نصیر محمد اردبیلی دانشگاه خواجه نصیر اسماعیل سارانی دانشگاه خواجه نصیر

induction motor especially the squirrel cage type of this motor plays important role in industry. according to the application type, this motor place against various stresses that are caused failure in the motor. the most common failure is related to the stator winding. among these failures are turn-to-turn, coil-to-coil and phase to phase faults. flow the high current do to the induction resul...

2018
Barbara Dymerska Benedikt A. Poser Markus Barth Siegfried Trattnig Simon Robinson

We propose a method to calculate field maps from the phase of each EPI in an fMRI time series. These field maps can be used to correct the corresponding magnitude images for distortion caused by inhomogeneity in the static magnetic field. In contrast to conventional static distortion correction, in which one 'snapshot' field map is applied to all subsequent fMRI time points, our method also cap...

2008
V. V. Kotlyar S. N. Khonina V. A. Soifer Y. Wang

Aberrations of the coherent wavefront are analyzed using a phase Zernike filter. Developed iterative methods allow us to design a filter that decomposes the analyzed light field into a set of diffraction orders with amplitudes proportional to the circular Zernike polynomials. We also apply the algorithm to the calculation of the light field phase from measurements of the modules of decompositio...

2003
Julien Kockelkoren Herbert Levine Wouter-Jan Rappel

We introduce a phase field approach for diffusion inside and outside a closed cell with damping and with source terms at the interface. The method is compared to exact solutions (where possible) and the more traditional finite element method. It is shown to be very accurate, easy to implement and computationally inexpensive. We apply our method to a recently introduced model for chemotaxis by R...

2011
K. Mikelsons J. K. Freericks

We model a system of ultracold fermionic dipolar molecules on a two-dimensional square lattice. Assuming that the molecules are in their nondegenerate hyperfine ground state, and that the dipole moment is polarized perpendicular to the plane (as in the recent experiments on 40K-87Rb molecules), we approximate these molecules as spinless fermions with long-range repulsive dipolar interactions. W...

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