Results 1 to 10 of about 158,369 (273)
Frontiers in Bioengineering and Biotechnology, 2023 Individuals with acute neurological or limb-related disorders may be temporarily bedridden and unable to go to the physical therapy departments. The rehabilitation training of these patients in the ward can only be performed manually by therapists ...
Daoyu Wang +7 more
doaj +1 more source
Identification of Grid Impedance by Broadband Signals in Power Systems with High Harmonics
Energies, 2021 Grid impedance is an important parameter and is used to perform impedance-based stability analysis for the operation of grid-connected systems, such as power electronics-interfaced solar, wind and other distributed power generation systems.
Matthias Buchner, Krzysztof Rudion
doaj +1 more source
Frontiers in Energy Research, 2023 To cope with the energy crisis and environmental degradation, the new energy represented by wind and photovoltaic power generations have developed rapidly, which leads to a large number of power electronic converters being connected to the power grid. In
Changjun Zhao +3 more
doaj +1 more source
Frontiers in Physics, 2021 Electromechanical impedance (Electromechanical impedance)-based methods as potential nondestructive evaluation (NDT) techniques have been widely used in the field of structural health monitoring (SHM), especially for the civil, mechanical, and aerospace ...
Yabin Liang +13 more
doaj +1 more source
Review of Local Network Impedance Estimation Techniques
IEEE Access, 2020 As a result of increasing variability of network impedance, interest in impedance estimation techniques is growing. This review contextualises local impedance estimation techniques by providing a historical prospective on the uses of these techniques ...
Mathieu Kervyn De Meerendre +5 more
doaj +1 more source
Antenna Design for Semi-Passive UHF RFID Transponder with Energy Harvester [PDF]
, 2015 A novel microstrip antenna which is dedicated to UHF semi-passive RFID transponders with an energy harvester is presented in this paper. The antenna structure designed and simulated by using Mentor Graphics HyperLynx 3D EM software is described in ...
Jankowski-Mihulowicz, P. +2 more
core +5 more sources
A Harmonic Impedance Identification Method of Traction Network Based on Data Evolution Mechanism
Energies, 2020 In railway electrification systems, the harmonic impedance of the traction network is of great value for avoiding harmonic resonance and electrical matching of impedance parameters between trains and traction networks.
Ruixuan Yang, Fulin Zhou, Kai Zhong
doaj +1 more source
Energies, 2023 The accurate detection and identification of intermittent cable faults are helpful in improving the reliability of the distribution system. This paper proposes intermittent fault detection and identification for distribution networks based on machine ...
Mojgan Hojabri +2 more
doaj +1 more source
Bayesian identification of acoustic impedance in treated ducts [PDF]
The Journal of the Acoustical Society of America, 2015 The noise reduction of a liner placed in the nacelle of a turbofan engine is still difficult to predict due to the lack of knowledge of its acoustic impedance that depends on grazing flow profile, mode order, and sound pressure level. An eduction method, based on a Bayesian approach, is presented here to adjust an impedance model of the liner from ...
Y, Buot de l'Épine +2 more
openaire +2 more sources
A Comparison of Time-Domain Implementation Methods for Fractional-Order Battery Impedance Models
Energies, 2021 This paper is a comparative study of the multiple RC, Oustaloup and Grünwald–Letnikov approaches for time domain implementations of fractional-order battery models.
Brian Ospina Agudelo +2 more
doaj +1 more source