Results 21 to 30 of about 3,442 (220)

An algorithm for fitting passive equivalent circuits for lumped parameter frequency dependent transmission line models

IET Generation, Transmission & Distribution, 2021
Accurately fitting rational functions to the frequency response of modal impedances is crucial for including frequency dependency in lumped parameter models of transmission lines.
Kiran Kumar Challa, Gurunath Gurrala, Pritam Mukherjee   +2 more
doaj   +1 more source

Articulación entre la educación media técnica profesional (EMTP) y la educación superior técnico profesional (ESTP): un análisis de regresiones logísticas estereotípicas

Ciencia y Educación, 2020
El presente estudio tiene por objetivo determinar si la edu-cación media técnica —EMTP— tiene un impacto en la probabilidad de selección de programas de educación técnica superior que requieren diferentes niveles de habilidades duras (razonamiento ...
Claudia P. Ovalle Ramírez
doaj   +1 more source

Epinephrine Dosing by Emergency Medicine Residents During a Simulated Prehospital Pediatric Cardiac Arrest. [PDF]

AEM Educ Train
ABSTRACT Background Pediatric prehospital dosing errors occur at high rates, up to 60% for epinephrine. Senior emergency medicine residents (EMR) in the Western Michigan University Homer Stryker MD School of Medicine (WMed) residency respond as EMS physicians to cardiac arrests in Kalamazoo County.
Higby HJ, Hoyle JD, Mastenbrook JD, Pazderka PA, Fichuk S, Wilkinson A, Porter C.   +6 more
europepmc   +2 more sources

Reducing the Effect of Lightning on Step and Touch Voltages in a Grounding Grid Using a Nature-Inspired Genetic Algorithm With ATP-EMTP

IEEE Access, 2019
This paper discusses the step and touch voltages, based on body resistance, in a grounding grid after a lightning strike at a 434-/21-kV substation. To ensure grounding grid safety, the maximum step and touch voltage should not exceed the safety criteria
Saeid Gholami Farkoush, Abdul Wadood, Tahir Khurshaid, Chang-Hwan Kim, Muhammad Irfan, Sang-Bong Rhee   +5 more
doaj   +1 more source

Dual Provision and Training Models. A Pending Task for the Case of Professional Technical Secondary Education in Chile

Saberes Educativos, 2020
In Chile, professional technical secondary education (EMPT in Spanish), in its essence and objective, ensures that its students achieve early entry into the labor market based on solid competences, skills, abilities and knowledge, also contributing to ...
Christian Loyola-Bustos
doaj   +1 more source

Research on VFTO Identification of GIS Based on Wavelet Transform and Singular Value Decomposition

Energies, 2022
The accurate identification of Very Fast Transient Overvoltage (VFTO) is the key of overvoltage control in modern smart grids. In order to accurately identify VFTO generated by the operation of a disconnector in Gas Insulated Substation (GIS), a VFTO ...
Gang Xiao, Quansen Rong, Miaoran Yang, Peng Xiao, Qihong Chen, Junzhe Fan, Haoran Guo, Haonan Wang   +7 more
doaj   +1 more source

基于EMTP仿真和实测的接地电缆雷电过电压特性分析

Dianci bileiqi, 2021
针对目前缺少有效设备仪器和方法保护接地系统雷击浪涌的问题,文中系统化地研究了地下配电电缆中使用的接地系统的暂态特性。通过现场实验测试与EMTP仿真分析,对传统多点接地电缆系统和非捆绑式公共接地电缆系统中性线感应的雷电过电压进行了评估计算与详细比较。首先通过EMTP软件建立配电缆雷击感应电压计算仿真模型;然后通过比较实际测量结果与EMTP仿真所得到的数值结果,验证本研究所建立的仿真模型的有效性和准确性。最终,通过验证后的模型的EMTP仿真结果对雷电绝缘水平进行预测。
廖思哲, 王婉婷, 郑刚
doaj  

Comparative study of 220 kV overhead transmission lines models subjected to lightning strike simulation by using electromagnetic and alternative transients program

Electrical engineering & Electromechanics, 2022
Introduction. In high voltage networks intended for the transport of electrical energy, lightning can strike an electric line striking either a phase conductor, a pylon or a ground wire, causing significant overvoltage on the transmission lines ...
S. Boumous, Z. Boumous, Z. Anane, H. Nouri   +3 more
doaj   +1 more source

Quantitative Susceptibility Mapping of Kidney Stones: An Ex Vivo MRI Phantom Study

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To visualize and characterize the five most common kidney stone types based on their magnetic susceptibilities in MRI using QSM. Methods Three water‐based agar phantoms were constructed, containing a total of 53 ex vivo kidney stones of varying types and sizes.
Lion H. Mücke, Frederik B. Laun, Ruben de Figueiredo Cardoso, Guillaume Flé, Jennifer Lorenz, Alexander Fichte, Michael Uder, Nadine Bayerl, Jannis Hanspach   +8 more
wiley   +1 more source

Desempenho da proteção diferencial em transformadores de potência perante condições especiais de operação [PDF]

, 2012
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia ElétricaRelés digitais vêm gradualmente substituindo os relés eletromecânicos porque são mais sensíveis, mais flexíveis e várias ...
Verney, Luiz Henrique Costa de
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