Results 51 to 60 of about 421,517 (209)

Tower impulse grounding resistance measurement based on multiple frequency impedance

open access: yesIET Generation, Transmission & Distribution, 2023
Tower impulse grounding resistance is important for judging the lightning protection performance of transmission lines. Therefore, it is significant to accurately measure the tower impulse grounding resistance. Existing measurement methods mainly contain
Yihua Dan   +5 more
doaj   +1 more source

Delay Estimator and Improved Proportionate Multi-Delay Adaptive Filtering Algorithm [PDF]

open access: yes, 2012
This paper pertains to speech and acoustic signal processing, and particularly to a determination of echo path delay and operation of echo cancellers. To cancel long echoes, the number of weights in a conventional adaptive filter must be large.
Sakhnov, K.   +2 more
core   +1 more source

Paramagnetic magnetization signals and curious metastable behaviour in field-cooled magnetization of a single crystal of superconductor 2H-NbSe2 [PDF]

open access: yes, 2015
We present here some newer characteristics pertaining to paramagnetic Meissner effect like response in a single crystal of the low Tc superconducting compound 2H-NbSe2 via a detailed study of effects of perturbation on the field-cooled magnetization ...
Balakrishnan, G.   +4 more
core   +2 more sources

Impulse control disorders: updated review of clinical characteristics and pharmacological management

open access: yesFrontiers in Psychiatry, 2011
Impulse control disorders (ICDs) are characterized by urges and behaviors that are excessive and/or harmful to oneself or others and cause significant impairment in social and occupational functioning, as well as legal and financial difficulties.
Jon E Grant   +2 more
doaj   +1 more source

Air breakdown characteristics in plane-plane and sphere gap electrode configuration under lightning impulse [PDF]

open access: yes, 2014
This report describes the air breakdown characteristics in plane-plane and sphere gap electrode configuration under lightning impulse. The breakdown in air (spark breakdown) is the transition of a non-sustaining discharge into a self sustaining ...
Rosdi, Hairierosniza
core  

Characteristics of Impulse Discharges in Wet Soil

open access: yesThe Transactions of The Korean Institute of Electrical Engineers, 2017
This paper presents the experimental results related to soil ionization and electrical breakdown in a concentric hemispherical electrode system under lightning impulse voltages. Dynamic voltage-current and impedance-time characteristics of soil ionization were measured and analyzed. Also the electrical breakdowns of the soil gap were investigated.
Hoe-Gu Kim, Bok-Hee Lee
openaire   +2 more sources

Influence of Pulse Interval on Soil Dispersion Characteristics under Continuous Impulse

open access: yesAdvances in Electrical and Computer Engineering
Under continuous lightning strikes, the impulse dispersion characteristics of grounding devices more effectively indicate the effectiveness of tower grounding for lightning protection.
CAO, W.   +4 more
doaj   +1 more source

Research on the dynamic characteristics of the cavitation bubble collapsing between multiple particles

open access: yesUltrasonics Sonochemistry
The combined action of multiple particles and cavitation bubbles can severely damage hydraulic machinery. Combining the Kelvin impulse theory and the results of high-speed photography experiments, this paper researches the dynamic behaviors of a single ...
Xiaoyu Wang   +4 more
doaj   +1 more source

Study on Spatial-Temporal Distribution Characteristics of the Discharge Process in a 1 m Rod-Plate Gap Under Different Polarity Lightning Impulses

open access: yesIEEE Access, 2019
The observation of the air gap discharge process is the basis of revealing the physical mechanism of gas discharge and establishing the accurate numerical simulation model.
Yaqi Zhang   +7 more
doaj   +1 more source

Low-frequency phase diagram of irradiated graphene and periodically driven spin-1/2 $XY$ chain

open access: yes, 2017
We study the Floquet phase diagram of two-dimensional Dirac materials such as graphene and the one-dimensional (1D) spin-1/2 $XY$ model in a transverse field in the presence of periodic time-varying terms in their Hamiltonians in the low drive frequency (
Mohan, Priyanka   +3 more
core   +1 more source

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