Results 21 to 30 of about 130,007 (263)

The Applicability of Traditional Protection Methods to Lines Emanating from VSC-HVDC Interconnectors and a Novel Protection Principle

open access: yesEnergies, 2016
Voltage source converter (VSC)-based high voltage direct current (VSC-HVDC) interconnectors can realize accurate and fast control of power transmission among AC networks, and provide emergency power support for AC networks. VSC-HVDC interconnectors bring
Shimin Xue   +6 more
doaj   +1 more source

Evaluation of a pilot consultation for maternity protection at work in Switzerland

open access: yesSwiss Medical Weekly, 2022
STUDY AIMS: Switzerland’s Labour Law and its Ordonnance on Maternity Protection aim to protect the health of pregnant employees and their unborn children while enabling them to continue to pursue their professional activities. Some companies encounter difficulties implementing the law’s provisions.
Krief, P.   +7 more
openaire   +4 more sources

A Novel Pilot Protection Principle Based on Modulus Traveling-Wave Currents for Voltage-Sourced Converter Based High Voltage Direct Current (VSC-HVDC) Transmission Lines

open access: yesEnergies, 2018
Protection for transmission lines is one of crucial problems that urgently to be solved in constructing the future high-voltage and large-capacity voltage-sourced converter based high voltage direct current (VSC-HVDC) systems.
Xiangyu Pei   +2 more
doaj   +1 more source

Effective time of a diffusion source in a pack cementation process on the AZ91D magnesium alloy

open access: yesJournal of Materials Research and Technology, 2023
The powder thermal diffusion alloying method is an important method to fabricate intermetallic coatings on magnesium alloy substrates. The diffusion source, the diffusion time and the diffusion temperature are key parameters for a diffusion alloying ...
Dongzhu Lu   +5 more
doaj   +1 more source

Pilot Protection for Transmission Line of Grid-Forming Photovoltaic Systems Based on Jensen–Shannon Distance

open access: yesApplied Sciences
When faults occur in transmission lines of grid-forming PV systems, the LVRT control and virtual impedance function cause the fault characteristics of grid-forming inverters to differ significantly from those of synchronous generators, which deteriorates
Kuan Li, Qiang Huang, Rongqi Fan
doaj   +1 more source

Development of facile image processing techniques regarding crevice corrosion of U75V high-speed rail steel

open access: yesJournal of Materials Research and Technology, 2023
In-situ crevice corrosion images of U75V high-speed rail steel samples before and after heat treatment for microstructure refinement were obtained by a self-developed monitoring device, and facile image processing techniques have been developed.
Jian Wang   +5 more
doaj   +1 more source

General Data Protection Regulation – results of a pilot study [PDF]

open access: yesEuropean Journal of Service Management, 2018
The article focuses on the social aspects of the GDPR implementation. Paper presents the results of a study conducted in 2018, after the introduction of legislative changes. The study was exploratory and its aim was to find out how administrative employees evaluated and feels about GDPR. The survey was conducted as an online survey questionnaire.
Czaplewski, Maciej   +2 more
openaire   +2 more sources

Is Balneotherapy Protective Against Oxidative Stress? A Pilot Study

open access: yesIn Vivo, 2023
This study aimed to research the effects of Harkány healing water on oxidative stress. The study was performed in a randomized, placebo-controlled, double-blind setup.Twenty patients with psoriasis who underwent a 3-week-long inward balneotherapy-based rehabilitation were enrolled. Psoriasis Area and Severity Index (PASI) score and Malondialdehyde (MDA)
Agnes, Szenczi   +10 more
openaire   +2 more sources

Biweight Midcorrelation Based Transmission Line Pilot Protection Algorithm

open access: yesIEEE Open Access Journal of Power and Energy
This paper presents a novel pilot protection algorithm for alternating current (ac) transmission lines that relies on biweight midcorrelation (BWMC) coefficients between the terminals’ currents.
Rodrigo Rozenblit Tiferes   +3 more
doaj   +1 more source

Crevice corrosion of U75V high-speed rail steel with varying crevice gap size by in-situ monitoring

open access: yesJournal of Materials Research and Technology, 2022
Crevice corrosion of high-speed rail steel U75V was studied with varying gap size by using self-designed device. Increasing gap size inhibited exterior cathodic reduction reaction of oxygen, inducing decrease of potential difference between interior and ...
Weichen Xu   +6 more
doaj   +1 more source

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