نتایج جستجو برای: electromagnetic method

تعداد نتایج: 1692187  

2015
Bing Li Daniel Månsson

In this paper, the frequency responses of the loads in different types of electrical networks subjected to intentional electromagnetic interference (IEMI), are analysed with a method based on the Baum-Liu-Tesche (BLT) equation. The networks can be multi-conductor systems with multiple junctions and branches. To verify the calculation results, a commercial electromagnetic simulator based on elec...

2009
Huijuan Zhang Meng Wu Yanting Wang Xiaohui Tang Shitao Wang

In order to study the electromagnetic compatibility of a power system, authors adopted an effective analysis software and proposed a new prediction method. First, simulated and analyzed the electromagnetic transient when switching the no-load bus in the 500kV substation by the ATP software and proved the simulation results were consistent with the actual results; Second, introduced the Gray pre...

Journal: :research journal of pharmacognosy 0
z. hasani sadrabadi department of plant biology, faculty of biological science, kharazmi university, tehran, iran. a. majd department of plant biology, faculty of biological science, kharazmi university, tehran, iran. m. hamzeloo-moghadam department of traditional pharmacy, school of traditional medicine, shahid beheshti university of medical sciences, tehran, iran. traditional medicine and materia medica research center, shahid beheshti university of medical sciences, tehran, iran. s. irian department of plant biology, faculty of biological science, kharazmi university, tehran, iran.

background and objectives: electric, magnetic and electromagnetic fields can act as stress factors with different effects on biological systems. due to the nutritional and medicinal values, and the increasing electromagnetic radiations, the present study was performed to investigate the effects of the electromagnetic field on the developmental stages and cytotoxic properties of okra. methods: b...

Journal: :تحقیقات نظام سلامت 0
سمیه بلقن آبادی دانشجوی کارشناسی ارشد گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران حسینعلی یوسفی مربی، عضو هیأت علمی گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، اصفهان، ایران حبیب اله دهقان استادیار، عضو هیأت علمی، گروه مهندسی بهداشت حرفه ای، دانشکده بهداشت، دانشگاه علوم پزشکی اصفهان، ایران

background: with increased use of computers, exposure to electric and magnetic fields is increasing, the main objective of this study was to evaluate the electric and magnetic field strength in portable computers (laptops) and its relation with eyestrain users. methods: in this cross – sectional study, magnetic and electric fields in 125 laptop computers were measured from 30 cm and 50 cm dista...

2004
Menno E. Verbeek

The accurate simulation of the electromagnetic behaviour of interconnects and on-chip inductors is becoming more and more important for chip designs. For this purpose, we investigate the use of the electric field integral equation, which can be used to construct a full-wave electromagnetic model. To facilitate the combined analysis of the chip’s circuit and the electromagnetic behaviour, the el...

A Tavakoli Golpaygani, F Nouri L Ataee M M Movahedi M Taheri, S Amani

Background: The increasing use of telecommunication devices such as Wi-Fi modems and mobile phones in the recent years can change the cellular structure of microorganisms so the generation of electromagnetic waves has led to concern in the community whenever be exposed to these fields and may have harmful effects on human health.Material and Methods: Standard strains of bacteria were prepared o...

2003
Iwo Bialynicki-Birula

New method of introducing vortex lines of the electromagnetic field is outlined. The vortex lines arise when a complex Riemann-Silberstein vector (E + iB)/ √ 2 is multiplied by a complex scalar function φ. Such a multiplication may lead to new solutions of the Maxwell equations only when the electromagnetic field is null, i.e. when both relativistic invariants vanish. In general, zeroes of the ...

2008
Tsuyoshi Matsuoka Mayumi Matsunaga Toshiaki Matsunaga

The computer simulation of electromagnetic (EM) wave propagation in time domain plays an important role of development of wireless communications. Higher frequency is required for high data-rate communication; it makes the simulation large scale computation. Up to now, the FDTD method have been widely used for the computer simulation[1]. Recently, another method, the constrained interpolation p...

Journal: :ESAIM: Mathematical Modelling and Numerical Analysis 1994

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