Results 21 to 30 of about 90,241 (306)

A New Phase Sequence Exchanging Control Method for Reducing Impulse Current and Voltage

IEEE Access, 2019
Phase sequence exchanging technology (PSET) is a recently developed emergency control technology for out-of-step power systems. The PSET system does not satisfy the condition of synchronization however, and will produce impulse current and impact torque.
Yifan Li, Shaofeng Huang, Hui Li, Jian Zhang, Gang Huang, Yangjingyi Luo   +5 more
doaj   +1 more source

Two current systems in the preliminary phase of sudden commencements in the magnetosphere

Earth, Planets and Space, 2022
The preliminary impulse of the sudden commencement is simply explained by the generation of the compressional wave due to sudden compression of the dayside magnetopause and mode conversion from the compressional wave to the Alfvén wave in the ...
Shigeru Fujita, Takashi Tanaka
doaj   +1 more source

Research on the Time-Domain Dielectric Response of Multiple Impulse Voltage Aging Oil-Film Dielectrics

Energies, 2021
Power capacitors suffer multiple impulse voltages during their lifetime. With the multiple impulse voltage aging, the internal insulation, oil-film dielectric may deteriorate and even fail in the early stage, which is called accumulative effect.
Chenmeng Zhang, Kailin Zhao, Shijun Xie, Can Hu, Yu Zhang, Nanxi Jiang   +5 more
doaj   +1 more source

Reference values of impulse oscillometric lung function indices in adults of advanced age. [PDF]

, 2013
Impulse oscillometry (IOS) is a non-demanding lung function test. Its diagnostic use may be particularly useful in patients of advanced age with physical or mental limitations unable to perform spirometry.
Wichmann, Heinz-Erich, Rudolf A. Jörres, Margit Heier, Rudolf A. Jörres (340115), Behr, Jürgen, Holle, R., H.-Erich Wichmann (72009), H.-Erich Wichmann, Karrasch, S., Huber, R.M., Wichmann, H.-E., Rolf Holle, Rudolf M. Huber (412835), Nowak, Dennis, Peters, Annette, Joachim Heinrich (60421), Stefan Karrasch, Rudolf A Jörres, Rolf Holle (262610), KORA Study Group, Annette Peters (62601), Schulz, H., Holle, Rolf, Heier, M., Karrasch, Stefan, Annette Peters, Jürgen Behr (272687), Nowak, D., Holger Schulz, Dennis Nowak, Schulz, Holger, Peters, A., Huber, Rudolf M., Joachim Heinrich, Claudia Flexeder, Heinrich, Joachim, Rudolf M. Huber, H-Erich Wichmann, Claudia Flexeder (412834), Dennis Nowak (412836), Jürgen Behr, Heinrich, J., Rudolf M Huber, Margit Heier (200535), Watz, Henrik, Flexeder, Claudia, Behr, J., Flexeder, C., Stefan Karrasch (412837), Holger Schulz (13022), Jörres, R.A., Heier, Margit, Jörres, Rudolf A., Wichmann, H.-Erich   +53 more
core   +1 more source

An optimal phase control method for the suppression of phase sequence exchange impulse current and voltage

IET Power Electronics, 2022
Phase sequence exchange (PSE) is an emerging emergency control method for power systems. However, PSE will generate impulse current and voltage. In this research, to suppress the impulse of PSE, a phase control method for zero‐current opening and equal ...
Yifan Li, Peng Sun, Hui Li, Shaofeng Huang, Haifeng Wu   +4 more
doaj   +1 more source

Geomagnetic disturbances on ground associated with particle precipitation during SC [PDF]

, 2010
We have examined several cases of magnetosphere compression by solar wind pressure pulses using a set of instruments located in the noon sector of auroral zone.
V. Safargaleev, Turunen, T., A. Kozlovsky, T. Turunen, F. Honary, A. Voronin, Honary, F., Voronin, A., Safargaleev, V., Kozlovsky, A.   +9 more
core   +1 more source

Transient impedance of grounding system with impulse superimposed sinewave

ENP Engineering Science Journal, 2021
Investigating the transient performance of grounding systems subject to lightning (impulse or impulse superimposed sinewave) is valuable for protecting the power system and maintaining the system operation.
Sherif Ghoneim, Ahdab Elmorshedy, Rabah Amer   +2 more
doaj   +1 more source

Research on large-capacity impulse test technology for distribution transformer based on energy storage intelligent power

Energy Reports, 2022
Large-capacity impulse test of distribution transformer requires a large amount of instantaneous energy, while the impulse mode of conventional dedicated high-voltage line and generator requires synchronous switch, adjusted impedance, generator, etc ...
Bo Niu, Xutao Wu, Jiaying Yu, Hong Wu, Weifeng Liu   +4 more
doaj   +1 more source

Impulsivity and Current Alcohol Use in Adolescents

European Psychiatry, 2017
IntroductionMany studies have focused on the strong link between impulsivity and addictive behaviors, such as alcohol use disorders.ObjectiveOur study aimed to investigate the links between alcohol use and impulsivity in a sample of Tunisian pupils.MethodsThis was a cross-sectional study conducted in May and June 2016.
N. Smaoui, N. Charfi, M. Turki, M. Maâlej-Bouali, J. Ben Thabet, N. Zouari, L. Zouari, M. Maâlej   +7 more
openaire   +2 more sources

About the stabilization of the dendritic structure of GG brand copper powder

Chimica Techno Acta, 2015
In industry copper powder is recieved under constant DC. Surface roughening occurs during evolution of the dendritic particles. It is suggested to create a new impulse of current equal to the initial current density of 3200 A/m2 in order to obtain ...
O. G. Reznikova, A. B. Darintseva, I. B. Murashova   +2 more
doaj   +1 more source