نتایج جستجو برای: bipolar cylindrical coordinate

تعداد نتایج: 112855  

2011
A. De Vita R. P. Croce I. M. Pinto B. Bisceglia

A general rigorous analytic framework for computing the transmembrane potential shift resulting from the nonlinear voltagecurrent membrane relationship in response to wideband stochastic electromagnetic radiation is outlined, based on Volterra functional series. The special case of an insulated cylindrical cell with HodgkinHuxley membrane in an infinite homogeneous medium is worked out in detai...

2008
Hiroshi Oba Masayuki Matsuo

We analyse deformation mechanism in neutron-rich Cr, Fe and Ti isotopes with N=3244 by means of a Skyrme-Hartree-Fock-Bogoliubov mean-field code employing a twodimensional mesh representation in the cylindrical coordinate system. Evaluating systematically the quadrupole deformation energy, we show that the Skyrme parameter set SkM* gives a quadrupole instability around the neutron number N∼38-4...

2011
Qiang SU Bin LIU Ji-ping HUANG

Due to the correspondence of the acoustic equations to Maxwell’s equations of one polarization in two dimensions, we exploit theoretically the acoustic counterpart of the recently proposed remote invisibility cloak. The cloak consists of a circular cylindrical core with designed bulk moduli, and an “anti-object” embedded inside a shell with anisotropic mass densities. The material parameters of...

Journal: :Optics letters 2006
Qian Wang Gerald Farrell

A novel all-fiber refractometer sensor is proposed, which is based on multimode interference in the multimode fiber core section sandwiched between two single-mode fibers. A wide-angle beam propagation method in the cylindrical coordinate is employed as the modeling tool for simulation and design of the proposed refractometer sensor. The design for a refractometer is presented that shows that t...

Journal: :Journal of physics 2023

Abstract In this paper, a cylindrical trimming method is applied to fit the hemisphere, and total reflectivity on certain boundary analyzed through series of derivations calculations. An equation that used calculate anechoic chamber obtained, obviously, it has no relationship with spherical coordinate radius r can be utilized optimize size. The proposed scheme non-standard proved simplified eff...

2005
Artur Macia̧g

We demonstrate a specific power series expansion technique to solve the three-dimensional homogeneous and inhomogeneous wave equations. As solving functions, so-called wave polynomials are used. The presented method is useful for a finite body of certain shape. Recurrent formulas to improve efficiency are obtained for the wave polynomials and their derivatives in a Cartesian, spherical, and cyl...

2007
B. H. Henin A. Z. Elsherbeni M. Al Sharkawy

Abstract—A rigorous semi-analytical solution is presented for electromagnetic scattering from an array of circular cylinders due to an obliquely incident plane wave. The cylinders are illuminated by either TMz or TEz incident plane wave. The solution is based on the application of the boundary conditions on the surface of each cylinder in terms of the local coordinate system of each individual ...

Journal: :Optics express 2011
Chengfu Yang Jingjing Yang Ming Huang Zhe Xiao Jinhui Peng

Electromagnetic cloak is a device which makes an object "invisible" for electromagnetic irradiation in a certain frequency range. Material parameters for the complementary medium-assisted external cylindrical cloak with arbitrary cross section are derived based on combining the concepts of complementary media and transformation optics. It can make the object with arbitrary shape outside the clo...

2006
Wei Qiao Zhi Ning Chen Ke Wu

This paper presents a top-hat sleeve monopole antenna for ultra-wideband (UWB) applications. The proposed antenna comprises a stem, a dielectric coat, and a top hat sleeve. A modal expansion technique used in cylindrical coordinate system is applied to study the impedance and radiation characteristics of the antenna. Influences of varying parameters of the antenna on impedance matching and radi...

2005
G. L. Nashed

The field equations of a special class of teleparallel theory of gravitation and electromagnetic fields have been applied to tetrad space having cylindrical symmetry with four unknown functions of radial coordinate r and azimuth angle θ. The vacuum stress-energy momentum tensor with one assumption concerning its specific form generates one non-trivial exact analytic solution. This solution is c...

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