Results 71 to 80 of about 506,198 (188)

Lightning Impulse Ageing of HV Cable Insulation

, 2009
Lightning impulses can lead to accelerated ageing of extruded cables. Electrical behaviour of a dielectric material when experiencing a lightning impulse is different to that for DC or power frequency applied voltages.
Dao, N L, Swingler, S G, Lewin, P L
core   +1 more source

Impulse ageing of polymeric materials

, 2011
Impulse over-voltage is a common phenomenon in electric power systems. A switching impulse is created by a switching surge or local fault while a lightning impulse is due to direct lightning strike to high voltage plant such as an overhead line.
Dao, Ngoc Long
core   +1 more source

A Rapid Impedance Measurement Method Based on Superposed Modulated Square Pulse

Kongzhi Yu Xinxi Jishu, 2013
A new current injection method was presented for impedance measurement to solve the problems in traditional methods, such as long measuring time and inaccuracy of high frequency.
YUE Xiaolong, ZHANG Zhenghua, SHI Hongtao, ZHANG Dong, ZHUO Fang   +4 more
doaj  

VISUALIZATION OF BIOLOGICAL TISSUE IMPEDANCE PARAMETERS

Бюллетень сибирской медицины, 2016
Objective. Investigation the opportunity for measurement of biological tissue impedance to visualize its parameters.Materials and methods. Studies were undertook on the experimental facility, consists of registrating measuring cell, constructed from flat
V. I. Bankov
doaj   +1 more source

Which impulse response function? [PDF]

, 2011
This paper compares standard and local projection techniques in the production of impulse response functions both theoretically and empirically. Through careful selection of a structural decomposition, the comparison continues to an application of US ...
Ronayne, David
core  

Validation of numerical simulations and experiments on impulse characteristics induced by self-excited oscillation

Scientific Reports
The high-frequency pulse flow, equivalent to the natural frequency of rocks, is generated by a self-excited oscillating cavity to achieve resonance rock-breaking.
Qiang Wu, Guodong Ji, Jian Zhao, Liudang Sun, Dapeng Han, Li Liu, Huaigang Hu, Jinping Yu, Changchang Chen, Yuqi Sun, Jinyong Guo   +10 more
doaj   +1 more source

On the Passivity Based Impedance Control of Flexible Joint Robots [PDF]

, 2007
In this work a novel type of impedance controllers for flexible joint robots is proposed. As a target impedance a desired stiffness and damping are considered without inertia shaping.
Hirzinger, Gerd, Albu-Schäffer, Alin Olimpiu, Ott, Christian, Kugi, Andreas   +3 more
core  

Arcing High Impedance Fault Detection Using Real Coded Genetic Algorithm

, 2007
Safety and reliability are two of the most important aspects of electric power supply systems. Sensitivity and robustness to detect and isolate faults can influence the safety and reliability of such systems.
Zamanan, N., Sykulski, J.K., Al-Othman, A.K.   +2 more
core   +1 more source

Discrepancy between airwave and impulse oscillometry measurements of impedance in healthy children

Pediatric Pulmonology
Introduction: Respiratory oscillometry (OSC) is a pulmonary function test that measures respiratory system impedance and is well-suited for young children. Previous studies have suggested that there may be differences between impedance values obtained on different instruments, however, no studies comparing ...
Heather Boas, Katharine Tsukahara, Joseph McDonough, Tryce Scully, Catherine Qiu, Laurie Travaglini, Kristina Ziolkowski, Maureen Parenti, Clement L. Ren, Sara B. DeMauro, Samuel L. Goldfarb, Julian L. Allen   +11 more
openaire   +1 more source

Interpretation of Partial-Discharge-Activated Frequency Response Analysis for Transformer Diagnostics

Machines
This paper introduces a novel diagnostic approach called partial-discharge-activated impulse frequency response analysis (PD-IFRA), developed to overcome the limitations of conventional frequency response analysis (FRA) in detecting partial discharges ...
Bonginkosi A. Thango
doaj   +1 more source