Wyniki wyszukiwania - BazTech

1

On the scattering of electromagnetic waves by bi-isotropic spherical shell

Shushkevich G., Shushkevich S., Kuts A.

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

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2017

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z. 89 [295], nr 1

111--122

EN

In this article an analytical solution of the problem of scattering of electromagnetic waves on bi-isotropic spherical shell has been presented. Secondary electromagnetic fields are introduced as a superposition of spherical vector wave functions. The solution of the boundary problem is reduced to solving a system of linear algebraic equations for the coefficients which are included in the presentation of the secondary fields. The formula to calculate the directional diagram of electric field in the far field and numerical results for different values of parameters have been obtained. The results may find practical application in the development and design of electromagnetic screens.

PL

W artykule przedstawiono analityczne rozwiązanie problemu rozpraszania fal elektromagnetycznych na biizotropowej powłoce kulistej. Wtórne fale elektromagnetyczne są przedstawiane jako superpozycja funkcji falowych wektora kulistego. Rozwiązanie problemu brzegowego zostało zredukowane do rozwiązania układu liniowych równań algebraicznych dla współczynników, które są zawarte w opisie pól wtórnych. Otrzymano wzór do obliczania diagramu kierunkowego pola elektrycznego w części pola oddalonej na dużą odległość od źródła promieniowania oraz otrzymano wyniki liczbowe dla różnych wartości parametrów. Wyniki mogą znaleźć praktyczne zastosowanie w rozwoju i projektowaniu ekranów elektromagnetycznych.

2

2D wave polynomials as base functions in modified FEM

Maciąg A., Maciejewska B., Sokała M.

Computer Assisted Mechanics and Engineering Sciences

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2008

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Vol. 15, No. 3/4

265-278

EN

The paper presents solutions of a two-dimensional wave equation by using Trefftz functions. Two ways of obtaining different forms of these functions are shown. The first one is based on a generating function for the wave equation and leads to recurrent formulas for functions and their derivatives. The second one is based on a Taylor series expansion and additionally uses the inverse Laplace operator. Obtained wave functions can be used to solve the wave equation in the whole considered domain or can be used as base functions in FEM. For solving the problem three kinds of modified FEM are used: nodeless, continuous and discontinuous FEM. In order to compare

3

Application of the wave function model for the detection of inhomogeneity of solids in the case of periodical concentration fluctuations

Inczédy J.

Chemia Analityczna

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1999

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Vol. 44, No. 3B

591-596

4

Trojańskie paczki falowe

Białynicka-Birula Z.

Postępy Fizyki

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1998

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T. 49, z. 3

164-168

EN

Nonspreading wave packets describing an electron in a hydrogen atom interacting with microwave radiation may exist under special conditions. They are called Trojan wave packets by an analogy with Trojan asteroids in the Sun-Jupiter system. The Trojan wave packets are extremely stable against ionization and even more stable against decay by spontaneous emission of light.

5

Sztuka pomiaru stanów kwantowych

Freyberger M., Bardroff P., Leichtle C., Schrade G., Schleich W.

Postępy Fizyki

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1998

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T. 49, z. 5

260-267

EN

Experiments on light and matter are now sensitive enough to unravel the wavefunction - the most fundamental entity of the quantum world.

6

The collapse paradigm : cascade photons coincidences experiment proposed

Szczepański A.

Journal of Technical Physics

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1998

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Vol. 39, no 2

361-363

EN

A two-photon cascade coincidence experiment is proposed to test the physical status of the wave function collapse via the measurement of the propagation velocity of the collapse effect.