Results 11 to 20 of about 337,652 (345)

ENERGY LOSS OF CHARGED PARTICLE ON THE WAVES EXCITATION IN SEMICONDUCTOR CYLINDER WITH TWO-DIMENSIONAL ELECTRON GAS ON THE SIDE SURFACE [PDF]

open access: yesРадиофизика и электроника, 2015
One of the urgent problems of modern radiophysics is the study of the fundamental properties of solid-state structures that contain nanodimension fragments.
A .V. Dormidontov   +2 more
doaj   +1 more source

Correcting the Doppler Effect

open access: yesScience & Philosophy, 2023
Christian Doppler, an Austrian physicist, described in 1842 the apparent change in frequency of a wave when motion of the source or the observer is involved. Named after him, this change in observational frequencies is known as the Doppler Effect.
Denis Thomas
doaj   +1 more source

Modeling of Monopulse Radar Signals Reflected from Ground Clutter in a Time Domain Considering Doppler Effects [PDF]

open access: yesJournal of Electromagnetic Engineering and Science, 2020
To evaluate the performance of a monopulse radar system, it is necessary to accurately model radar return signals from the ground surface in a time domain.
Jeong-Hun Nam   +4 more
doaj   +1 more source

Non-invasive Ultrasound Doppler Effect Based Method of Liquid Flow Velocity Estimation in Pipe [PDF]

open access: yesArchives of Acoustics, 2023
This paper discusses the estimation of flow velocity from a multi-sensor scenario. Different estimation methods were used, which allow the effective measurement of the actual Doppler shift in a noisy environment, such as water with air bubbles, and on ...
Pawel Biernacki   +2 more
doaj   +1 more source

On the symmetries of electrodynamic interactions

open access: yesScience & Philosophy, 2022
While mechanics was developed under the idea of reciprocal action (interactions), electromagnetism, as we know it today, takes a form more akin to unilateral action.
Hernán Gustavo Solari   +1 more
doaj   +1 more source

The Evaluation of Light Conditions Influence and Corrections upon Doppler Blood Perfusion Imagining

open access: yesAdvances in Electrical and Electronic Engineering, 2016
The paper deals with theoretical and experimental research of the ambient light influence upon the measuring reliability of the perfusion maps by the laser Doppler method using the device PeriScan PIM 3.
Jan Kubicek   +4 more
doaj   +1 more source

An influence of the covariance between single orbit parameters on the accuracy of observations of the pseudo-ranges and phase differences

open access: yesMetrology and Measurement Systems, 2020
The possibilities to improve values of the satellite orbit elements by employing the pseudo-ranges and differences of carrier phase frequencies measured at many reference GPS stations are analysed. An improvement of orbit ephemeris is achieved by solving
Skeivalas Jonas   +3 more
doaj   +1 more source

Missing Transverse-Doppler Effect in Time-Dilation Experiments with High-Speed Ions [PDF]

open access: yes, 2010
Recent experiments with high-speed ions have investigated potential deviations from the time-dilation predicted by special relativity (SR). The main contribution of this article is to show that the SR predictions are matched by the experimental results ...
C. Novotny   +13 more
core   +2 more sources

Doppler effect in the oscillator radiation process in the medium [PDF]

open access: yes, 2011
The purpose of this paper is to investigate the radiation process of the charged particle passing through an external periodic field in a dispersive medium.
Gevorgian, Lekdar, Vardanyan, Valeri
core   +2 more sources

Robust method for ship recognition based on ISAR imaging using 3D model

open access: yesThe Journal of Engineering, 2019
This study develops a robust method for ship target recognition, based on inverse synthetic aperture radar (ISAR) image matching with the template of 3D model.
Sudao D. Xie, M.Y. Pan, D.S. Li
doaj   +1 more source

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