Results 21 to 30 of about 737,256 (279)

Evaluation of a wave-vector-frequency-domain method for nonlinear wave propagation [PDF]

, 2011
A wave-vector-frequency-domain method is presented to describe one-directional forward or backward acoustic wave propagation in a nonlinear homogeneous medium.
Duck F. A., Greg T. Clement, Kuznetsov V, Molei Tao, Yun Jing   +4 more
core   +2 more sources

Balanced‐to‐unbalanced and balanced‐to‐balanced filtering rat‐race couplers using multilayer substate integrated waveguide cavities

IET Microwaves, Antennas & Propagation, 2021
This study reports a class of balanced‐to‐unbalanced (BTU) and balanced‐to‐balanced (BTB) filtering rat‐race couplers (FRCs) based on multilayer substrate integrated waveguide (SIW) cavities.
Xian Wang, Dongfang Zhou, Dewei Zhang, Yue Wang, Dalong Lv, Yi Zhang   +5 more
doaj   +1 more source

Методика выделения информативных признаков в сигналах геоакустической эмиссии

Информатика и автоматизация, 2019
Исследования геоакустической эмиссии в сейсмоактивном регионе на Камчатке показывают, что при подготовке землетрясений и последующей релаксации поля локальных напряжений в пункте наблюдений в геоакустических сигналах возникают ярко выраженные импульсные ...
Yuri Igorevich Senkevich, Yuri Valentinovich Marapulets, Olga Olegovna Lukovenkova, Alexandra Andreevna Solodchuk   +3 more
doaj   +1 more source

Statistical and simulation study on the separation in junction frequencies between ordinary (O) and extraordinary (X) wave in oblique ionograms

Earth, Planets and Space, 2022
The most important aim in interpreting an oblique ionogram is to obtain the accurate Junction Frequencies (JFs) of the ordinary (O) and extraordinary (X) mode.
Sun FengJuan, Wan XianRong, Zhang HongBo, Zhou Bao, Ban PanPan, Cao Hongyan   +5 more
doaj   +1 more source

An alternative implementation of the Lanczos algorithm for wave function propagation [PDF]

, 2006
We reformulate the Lanczos algorithm for quantum wave function propagation in terms of variational principle. By including some basis states of previous time steps into the variational subspace, the resultant accuracy increases by several orders ...
Jie, Quanlin, Liu, Dunhuan
core   +1 more source

Analysis of ionospheric parameters during Solar events and geomagnetic storms

E3S Web of Conferences, 2016
The paper shows new methods of analysis of ionospheric and magnetic data applying the models of multicomponent constructions (MCM models) developed by the authors.
Mandrikova Oksana, Polozov Yury, Solovev Igor, Fetisova Nadezhda   +3 more
doaj   +1 more source

Design of a polarization selective surface for co‐channel interference suppression

Electronics Letters, 2022
In this paper, a novel design of polarization selective surface (PSS) is proposed for co‐channel interference (CCI) suppression. By establishing a switchable doublet topology, two types of second‐order filtering responses with two transmission zeros are ...
Xian Wang, Yue Wang, Qikun Liu, Dongfang Zhou, Dalong Lv   +4 more
doaj   +1 more source

First results of atmospheric electricity measurements by CS110 electric field meter at Paratunka observatory, Kamchatka

E3S Web of Conferences, 2016
The results of continuous measurements of AEF potential gradient by CS110 fluxmeter at Paratunka observatory are presented.
Khomutov Sergey, Smirnov Sergey, Butin Stanislav, Babakhanov Ilkham   +3 more
doaj   +1 more source

Methods and Algorithms of Subsurface Holographic Sounding

Remote Sensing, 2022
In our experiments, we develop and test portable multi-element receiver antenna arrays, electrically scanned in order to immediately obtain a recognizable image of subsurface objects.
A. V. Popov, A. E. Reznikov, A. I. Berkut, D. E. Edemsky, P. A. Morozov, I. V. Prokopovich   +5 more
doaj   +1 more source

Determining Wind Shear Threshold by Using Historical Sounding Data in Experimental Area

Atmosphere
This paper conducts a technical study on a method for determining the occurrence threshold of wind shear based on historical sounding data. After analyzing the impact of low-altitude wind shear on aircraft flight safety, a method for determining the ...
Tingting Shu, Qinglin Zhu, Xiang Dong, Houcai Chen, Leke Lin, Xuan Liu   +5 more
doaj   +1 more source