Results 11 to 20 of about 140,378 (296)

Quantum Path Interferences in High-Order Harmonic Generation [PDF]

open access: yesPhysical Review Letters, 2008
We have investigated the intensity dependence of high-order harmonic generation in argon when the two shortest quantum paths contribute to the harmonic emission. For the first time to our knowledge, experimental conditions were found to clearly observe interference between these two quantum paths that are in excellent agreement with theoretical ...
Zair, A   +13 more
openaire   +3 more sources

Blind Deconvolution Based on Correlation Spectral Negentropy for Bearing Fault

open access: yesEntropy, 2023
Blind deconvolution is a method that can effectively improve the fault characteristics of rolling bearings. However, the existing blind deconvolution methods have shortcomings in practical applications.
Tian Tian   +3 more
doaj   +1 more source

Boost power factor correction converter with adaptive harmonic compensation control

open access: yesIET Power Electronics, 2023
In low‐voltage distribution systems, the increased penetration of power electronic devices leads to the decentralization of harmonic sources, which puts the sensitive loads or communication systems in the risk status. The conventional methods of point‐to‐
Rongfei Zhang   +4 more
doaj   +1 more source

Analysis on noise interference of FHD proton magnetometer at Wen’an seismic station

open access: yes地震科学进展, 2023
The FHD-2B proton magnetometer at Wen’an station had large F component noise from 2020 to 2021. There is a high correlation between noise interference and temperature, which is generally characterized by high noise in winter and low noise in summer.
Qiugen Wang   +3 more
doaj   +1 more source

Use of a spatially distributed in-phase antenna to increase the noise immunity of signal reception

open access: yesРоссийский технологический журнал, 2023
Objectives. Radio-technical information transmission systems are widely used in various sectors of our life, not only for telecommunications and associated domestic needs, but also for the functioning of various special services, such as emergency ...
G. V. Kulikov   +2 more
doaj   +1 more source

Multielectron interference of intraband harmonics in solids [PDF]

open access: yesPhysical Review B, 2019
High harmonic generation in solids provides us compact and coherent UV sources. Our simulations illustrate abnormal harmonic yield dependence on the intensity of driving or pre-excitation pulses. A multielectron interference model is proposed to reveal the mechanism of the extreme nonlinear optical phenomena.
Ling-Jie Lü, Xue-Bin Bian
openaire   +2 more sources

Two-center interference and ellipticity in high-order harmonic generation from H$_2^+$ [PDF]

open access: yes, 2010
We present a theoretical investigation into the two-center interference in aligned H$_2^+$. The influence of the laser field on the recombination step is investigated by comparing laser-induced harmonic generation with harmonic generation from field-free
Lein, Manfred, van der Zwan, Elmar V.
core   +3 more sources

A Two-stage approach to harmonic rejection mixing using blind interference cancelling [PDF]

open access: yes, 2008
Current analog harmonic rejection mixers typically provide 30–40 dB of harmonic rejection, which is often not sufficient. We present a mixed analog-digital approach to harmonic rejection mixing that uses a digital interference canceler to reject the ...
Klumperink, E.A.M.   +2 more
core   +2 more sources

A Software-Defined Radio Receiver Architecture Robust to Out-of-Band Interference [PDF]

open access: yes, 2009
In a software-defined radio (SDR) receiver it is desirable to minimize RF band-filtering for flexibility, size and cost reasons, but this leads to increased out-of-band interference (OBI). Besides harmonic and intermodulation distortion (HD/IMD), OBI can
Klumperink, E.A.M.   +3 more
core   +3 more sources

Influence of Phase Matching on the Cooper Minimum in Ar High Harmonic Spectra [PDF]

open access: yes, 2010
We study the influence of phase matching on interference minima in high harmonic spectra. We concentrate on structures in atoms due to interference of different angular momentum channels during recombination. We use the Cooper minimum (CM) in argon at 47
B. K. McFarland   +9 more
core   +3 more sources

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