Results 21 to 30 of about 20,529 (185)

Spectral domain analysis of double screen frequency selective surfaces

open access: yesJournal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper presents a numerical investigation for a double screen frequency selective surface (FSS) with perfectly conducting rectangular patch elements. The analysis uses a full wave technique to obtain the scattering characteristics.
Antonio Luiz Pereira de Siqueira Campos   +1 more
doaj   +2 more sources

LONG WAVES IN RECTANGULAR TANK GENERATED BY PLANE

open access: yesAdvanced Engineering Research, 2012
The surface form of heavy liquid in the rectangular wave tank covered with long waves over the flat bottom is i nvestigated. The waves are generated by the horizontal h armonic oscill a tions of the screen - formed wavemaker. The accurate solution to the
Victor V. Trepachev
doaj   +1 more source

LONG WAVES IN RECTANGULAR TANK GENERATED BY PLANE

open access: yesВестник Донского государственного технического университета, 2018
The surface form of heavy liquid in the rectangular wave tank covered with long waves over the flat bottom is i nvestigated. The waves are generated by the horizontal h armonic oscill a tions of the screen - formed wavemaker. The accurate solution to the
Victor V. Trepachev
doaj   +1 more source

Directional radiation properties of two impedance monopoles mounted on a perfectly conducting rectangular screen [PDF]

open access: yesРадиофизика и электроника, 2021
Subject and Purpose. Two impedance resonant monopoles of electric length 0.2 £ l / l £ 0.3 are mounted on a rectangular screen perpendicularly to the screen surface and studied for the directional radiation properties (directive gain and radiation ...
N.P. Yeliseyeva   +2 more
doaj   +1 more source

Unitary rotation and gyration of pixelated images on rectangular screens [PDF]

open access: yesJournal of the Optical Society of America A, 2016
In the two space dimensions of screens in optical sy stems, rotations, gyrations, and fractional Fourier transformations form the Fourier subgroup of the symplectic group of linear canonical transformations: U(2) F $\subset$ Sp(4,R). Here we study the action of this Fourier group on pixellated images within generic rectangular $N_x$ $\times$ $N_y ...
Urzúa, Alejandro R.   +1 more
openaire   +3 more sources

Exploring impacts of inlet condition on flow structure in a Compound open-channel using PIV [PDF]

open access: yesمهندسی مکانیک شریف, 2021
A compound open channel is composed of the main channel and flood plain. In experiments with compound open channel conducted to ensure that the flow is uniform and fully developed, it is necessary to study the distribution of discharge in the main ...
M. Nabipour   +4 more
doaj   +1 more source

Model tests on large-section and shallow soil rectangular pipe jacking

open access: yesYantu gongcheng xuebao, 2022
During the construction of pipe jacking tunnels, the simultaneous injection is a key in controlling the surface deformation and jacking force. At present, the traditional researches on the simultaneous injection are mainly limited to those on the slurry ...
PAN Yu-qing 1, 2, ZHEN Liang 3, JIANG Hai-li 3, LI Xiao-jun 1, 2
doaj   +1 more source

Applying numerical and computational methods to investigate the changes in the fluid parameters of the fluid passing over fins of different shapes with the finite element method

open access: yesInternational Journal of Thermofluids, 2022
This paper examines the velocity and temperature variation in the x-direction as well as the water fluid concentration through triangular, rectangular, and chamfer baffles in the presence of a uniform magnetic field. In this work, the research innovation
Reza Fathollahi   +7 more
doaj   +1 more source

Screen-Printed Flexible Circular and Rectangular Silver Spirals for Planar Electrodynamic Loudspeakers: A Comparative Study of Pressure Frequency Response [PDF]

open access: yes, 2022
We present the fabrication and characterization of flexible planar electrodynamic loudspeakers. Conductive spirals are fabricated on a flexible and transparent polyethylene terephthalate substrate via screen printing.
Petti, Luisa   +7 more
core   +1 more source

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