Results 21 to 30 of about 506,254 (285)

Research on impulse impedance model and protection optimization of transmission tower grounding device in mountainous area

IET Science, Measurement & Technology, 2021
The impulse impedance of the tower is the core parameter to evaluate the lightning protection performance of the transmission line. The high soil resistivity and the underground rock layers in the mountainous areas will induce large impulse impedance and
Lin Huang, Lijun Zhou, Dong Zhang, Dongyang Wang, Weifu Gu, Sixiang Chen   +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   +2 more sources

Impedance Control for a Free-Floating Robot in the Grasping of a Tumbling Target with Parameter Uncertainty [PDF]

, 2006
This paper addresses an impedance control for free-floating space robot in the grasping of a tumbling target with model uncertainty. Firstly, the operational space dynamics for a free-floating robot is derived with a novel, computationally efficient ...
Abiko, Satoko, Lampariello, Roberto, Gerd Hirzinger, Satoko Abiko, Roberto Lampariello, Hirzinger, Gerhard   +5 more
core   +1 more source

Insights on Oscillations and Impulses in Variable Impedance Control

, 2022
Operational-space impedance control allows to assign a mass-damper-spring (MDS) behavior to the end effector of a robotic manipulator. This aids resilience when interactions with the environment or humans are expected. While changing the virtual mass is not always practicable since it requires using precise force/torque sensors, varying the stiffness ...
Simonini, Giorgio, Colomba, Rachele Nebbia, Sammarco, Chiara, Angelini, Franco, Bicchi, Antonio, Pollayil, Mathew Jose   +5 more
openaire   +1 more source

High current field test of impulse transient characteristics of substation grounding grid

The Journal of Engineering, 2018
It is significant to research the impulse characteristics of substation grounding grid for its optimal design and safe and stable operation. In order to obtain the impulse transient characteristics of substation grounding grid under lightning impulse ...
Xuefang Tong, Xiaohui Dong, Bo Tan
doaj   +1 more source

Digital Impedance Emulator for Battery Measurement System Calibration

Sensors, 2021
Meaningful information on the internal state of a battery can be derived by measuring its impedance. Accordingly, battery management systems based on electrochemical impedance spectroscopy are now recognized as a feasible solutions for online battery ...
Francesco Santoni, Alessio De Angelis, Antonio Moschitta, Paolo Carbone   +3 more
doaj   +1 more source

Reference values of respiratory impedance with impulse oscillometry in healthy Chinese adults [PDF]

Journal of Thoracic Disease, 2020
Abstract Background: Impulse oscillometry (IOS) is a non-invasive pulmonary function test for measuring respiratory impedance. Available reference equations of IOS indices for adults are limited. The aim of this study was to develop reference equations of IOS indices for Chinese adults.Methods: In a multicentral, cross-sessional study of ...
Xiaolin Liang, Yi Gao, Weijie Guan, Jing Du, Li Chen, Wen Han, Jinming Liu, Yong Lu, Yi Peng, Bingrong Zhao, Tao wang, Jinping Zheng   +11 more
openaire   +2 more sources

Automatic compensation system for impedance measurement [PDF]

, 2002
This paper deals with the realization of the four-pair terminal definition of impedance standards. A simple, though reliable, system is described that allows an automatic compensation of the voltage at the low potential port of impedance standards to be ...
VALLAN A, PARVIS M, CALLEGARO, LUCA, Parvis, Marco, Carullo, Alessio, Vallan, Alberto, CALLEGARO L., Callegaro, L., CARULLO A, A. Vallan, A. Carullo, L. Callegaro, M. Parvis   +12 more
core   +1 more source

Diagnostics of Corrosion Protection Potential for Electric Water Heaters [PDF]

MATEC Web of Conferences, 2019
The paper represents the mathematical model for diagnostics of the corrosion protection potential for the electric water heaters (EWH). The research objectives are the problem of determining the EWH corrosion protection technical condition during its ...
Martynyuk Valeriy, Liss Michał, Wilczarska Joanna   +2 more
doaj   +1 more source

A Test Method for Acoustic Emission Properties of Natural Cellulose Fiber-Reinforced Composites

Applied Sciences, 2021
To test the acoustic performance of fiber-reinforced composites for replacing wood, an acoustic vibration test method is developed. For evaluation of the test method, composites are manufactured using hemp and ramie embedded in epoxy, through vacuum ...
Fanxizi Liu, Qiang Gao, Hui Guo, Chenhong Lang, Jinhua Jiang, Yiping Qiu   +5 more
doaj   +1 more source