Results 31 to 40 of about 90,241 (306)

Investigations on the Performance of a New Grounding Device with Spike Rods under High Magnitude Current Conditions

open access: yesEnergies, 2019
In many publications, the characteristics of practical earthing systems were investigated under conditions involving fast-impulse currents of different magnitudes by field measurements.
Abdul Wali Abdul Ali   +4 more
doaj   +1 more source

Design of internal power supply circuit for mining intrinsic safety broadcasting system equipment

open access: yesMeikuang Anquan
The mining intrinsic safety broadcasting system equipment has the characteristics of unbalanced load current and high power consumption. In response to the problems of high start-up impulse current, short power supply distance, unreliable voltage ...
Dedong ZOU, Chengdong LI
doaj   +1 more source

Investigation on the Physical Properties of Varistors According to Temperature

open access: yesIEEE Access, 2022
This study aims to determine the basic physical properties of varistor, which is a protective element in a surge protection device (SPD) used to prevent damage to electric and electronic equipment due to lightning.
Ahran Min, Sin-Dong Kang, Jae-Ho Kim
doaj   +1 more source

Laboratory study on impulse current characteristics of clay

open access: yes, 2017
Lightning is recognised as one of the most detrimental natural disasters. While numerous research studies were carried out on the lightning impulse characteristics of the grounding system and the critical breakdown characteristics of soil, little ...
Liu, Y, Chen, Q, Nimbalkar, S, Rao, P
core   +2 more sources

Influence of High Current-Density Impulses on the Stress-Strain Response and Microstructural Evolution of the Single Crystal Superalloy CMSX-4 [PDF]

open access: yesMaterials Research, 2018
Owing to the low formability of single-crystal nickel-based materials, single-crystal components are typically cast. Subsequently, a multi-stage heat treatment is carried out in order to partially compensate the dendrite segregation and to stabilize the ...
Eugen Demler   +6 more
doaj   +1 more source

Critical Parameters of the Athermal Electroplastic Effect in Metallic Materials

open access: yesИнженерные технологии и системы
Introduction. Plastic deformation and electric current, acting separately, usually have opposite effects on the deformation behavior and flow stresses in electrically conductive materials.
Vladimir V. Stolyarov
doaj   +1 more source

Activity-dependent excitability changes in normal and demyelinated rat spinal root axons [PDF]

open access: yes, 1985
Myelinated nerve fibres with a reduced safety factor for conduction due to demyelination are easily blocked by trains of impulses. To find out why, in vivo recordings from rat ventral root fibres demyelinated with diphtheria toxin have been supplemented ...
H Bostock   +3 more
core   +1 more source

Heterogeneity in the Global Practice of Central Nervous System Staging in Pediatric Acute Lymphoblastic Leukemia

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Central nervous system (CNS) involvement in childhood acute lymphoblastic leukemia (ALL) is assessed by cell counting and cytomorphology from cerebrospinal fluid (CSF) and is used for treatment stratification worldwide. The ratio of “CNS2” patients in clinical trials ranges from 3% to 40%, with unclear prognostic significance ...
Laura Almási   +14 more
wiley   +1 more source

Linear active disturbance rejection seamless switching control strategy of virtual synchronous generator

open access: yes电力工程技术
Microgrids controlled by virtual synchronous generators (VSG) experience inrush currents and voltage offsets during transitions between grid-connected and islanded modes. These phenomena cause fluctuations in active power and frequency, thereby affecting
Changjiu TANG   +5 more
doaj   +1 more source

IFI and ISI premitigation for block-code-modulated noncoherent UWB impulse radio: A code optimization approach [PDF]

open access: yes, 2012
Codeword matching and signal aggregation (CMSA) is a recently proposed low-complexity noncoherent receiver for block code modulated UWB Impulse Radio (UWB-IR) systems. As the frame/symbol duration is shortened to boost data rate, inter-frame interference
Lv, Tiejun   +4 more
core   +1 more source

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