نتایج جستجو برای: electromagnetic parameters

تعداد نتایج: 647380  

Journal: :J. Sci. Comput. 2006
H. T. Banks Vrushali A. Bokil Doina Cioranescu Nathan L. Gibson Georges Griso Bernadette Miara

In this paper we employ the periodic unfolding method for simulating the electromagnetic field in a composite material exhibiting heterogeneous microstructures which are described by spatially periodic parameters. We consider cell problems to calculate the effective parameters for a Debye dielectric medium in the cases of circular and square microstructures in two dimensions. We assume that the...

2017
Hany M Elgohary Sayed A Tantawy

[Purpose] To investigate the effect of pulsed electromagnetic field with or without exercise therapy in the treatment of benign prostatic hyperplasia. [Subjects and Methods] Sixty male patients aged 55-65 years with benign prostatic hyperplasia were invited to participate in this study. Patients were randomly assigned to Group A (n=20; patients who received pulsed electromagnetic field in addit...

A dual-band artificial magnetic material and then a dual-band double-negative metamaterial structure based on symmetric spiral resonators are presented. An approximate analytical model is used for the initial design of the proposed structures. The electromagnetic parameters of the proposed metamaterial structure retrieved using an advanced parameter retrieval method based on the causality princ...

Journal: :journal of modern processes in manufacturing and production 2013
mehdi zohour bahman ghorbani

electromagnetic forming is a high energy rate forming process. in this process, an electromagnetic lorentz body force is used for deformation of products. in this article, electromagnetic forming process was simulated for assembly of parts as an innovative method. in this research work, the effect of important parameters of process such as discharge energy, radius and width of rectangular groov...

2010
Steven A Cummer Robert T Thompson

The fundamental framework of transformation optics describes how coordinate transformations on electromagnetic fields can be physically realized through complex material parameters. This approach includes the possibility of transforming time as well as space, but the applications of such transformations remain relatively unexplored. Here we analyze the material properties and wave effects of a ...

2015
Kittipong Tripetch

Abstract—This paper proposes for the first time symbolic formula of the power spectrum of CMOS Cross Couple Oscillator and its modified circuit. Many principles existed to derived power spectrum in microwave textbook such as impedance, admittance parameters, ABCD, H parameters, etc. It can be compared by graph of power spectrum which methodology is the best from the point of view of practical m...

2013
Lei Chen Zhenya Lei Rui Yang Xiaowei Shi Jiawei Zhang

A straightforward approach is proposed to retrieve the effective electromagnetic parameters of a slab of bianisotropic material from the scattering parameters. We first obtain the values of the impedance and refractive index of a slab of metamaterial, followed by the deduction of the expressions for determining these electromagnetic parameters including permittivity, permeability and magnetoele...

2014
Bogdan Lewczuk Grzegorz Redlarski Arkadiusz Zak Natalia Ziółkowska Barbara Przybylska-Gornowicz Marek Krawczuk

One of the side effects of each electrical device work is the electromagnetic field generated near its workplace. All organisms, including humans, are exposed daily to the influence of different types of this field, characterized by various physical parameters. Therefore, it is important to accurately determine the effects of an electromagnetic field on the physiological and pathological proces...

2014
Peng Liu Liyun Fan Qaisar Hayat De Xu Xiuzhen Ma Enzhe Song

Analysis consisting of numerical simulations along with lab experiments of interaction effects between key parameters on the electromagnetic force based on response surface methodology (RSM) has been also proposed to optimize the design of high-speed solenoid valve (HSV) and improve its performance. Numerical simulation model of HSV has been developed in Ansoft Maxwell environment and its accur...

Journal: :CoRR 2006
Marco Frailis Oriana Mansutti Praveen Boinee Giuseppe Cabras Alessandro De Angelis Barbara De Lotto Alberto Forti Mauro Dell'Orso Riccardo Paoletti Angelo Scribano Nicola Turini Mose Mariotti Luigi Peruzzo Antonio Saggion

We studied the application of the Pseudo-Zernike features as image parameters (instead of the Hillas parameters) for the discrimination between the images produced by atmospheric electromagnetic showers caused by gamma-rays and the ones produced by atmospheric electromagnetic showers caused by hadrons in the MAGIC Experiment. We used a Support Vector Machine as classification algorithm with the...

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