Results 21 to 30 of about 55,732 (160)

High Frequency Power Cycling of Three-Phase Inverters for Aircraft Applications

Eletrônica de Potência
Accurate thermal cycle measurement is essential for estimating the lifetime of power modules, particularly those employing SiC MOSFETs characterized by extremely low thermal capacitance.
Alice H. T. Silva, Bernardo Cougo, Gilles Segond, Marco V. T. Andrade, Duc-Hoan Tran, Renata O. de Sousa, Lenin M. F. Morais   +6 more
doaj   +1 more source

Мониторинг субъективного благополучия в школе: оценка в рамках современной теории тестирования

Мониторинг общественного мнения: экономические и социальные перемены, 2022
Тема субъективного благополучия находится в фокусе внимания исследователей и практиков, однако наблюдается нехватка инструментов оценивания субъективного благополучия с подтвержденной валидностью и надежностью, которые позволяли бы проводить ...
Татьяна Николаевна Канонир, Ирина Львовна Угланова, Алёна Александровна Куликова   +2 more
doaj   +1 more source

Interactions between microstructure and fatigue crack growth in αβ titanium alloy [PDF]

MATEC Web of Conferences, 2020
In a context of optimization of the crack propagation resistance properties in αβ titanium alloys, this work aim to explore interactions between microstructure and deformation at crack tip in lamellar titanium alloy, especially regarding to the ...
Renon Vincent, Henaff Gilbert, Larignon Céline, Perusin Simon, Villechaise Patrick   +4 more
doaj   +1 more source

A Generic Tool for Multi-Fidelity MDO Under Uncertainty, with Application on Hybrid Electric Regional Aircraft

Engineering Proceedings
Modern engineering systems may require multidisciplinary design optimization (MDO) to account for the interactions between coupled physical phenomena.
Romain Espoeys, Matthias De Lozzo, Sylvain Béchet, Jean-Christophe Giret, François Gallard, Simone Mancini, Tim Klaproth   +6 more
doaj   +1 more source

HIGH TEMPERATURE OXIDATION OF TI-6AL-4V ALLOY FABRICATED BY ADDITIVE MANUFACTURING. INFLUENCE ON MECHANICAL PROPERTIES [PDF]

MATEC Web of Conferences, 2020
Titanium alloys, such as Ti-6Al-4V alloy, fabricated by additive manufacturing processes is a winning combination in the aeronautic field. Indeed, the high specific mechanical properties of titanium alloys with the optimized design of parts allowed by ...
CASADEBAIGT Antoine, MONCEAU Daniel, HUGUES Jonathan   +2 more
doaj   +1 more source

Semi-Automatic Building of Ontologies from Unstructured French Texts: Industrial Case Study

Data Science and Engineering
An enterprise’s knowledge is often contained in many documents of different types: textual and multimedia. Exploiting this information is generally difficult due to a lack of suitable tools.
Emna Amdouni, Abdelhadi Belfadel, Maxence Gagnant, Isabelle Renault, Samuel Kierszbaum, Jeremy Carrion, Matthieu Dussartre, Sana Tmar   +7 more
doaj   +1 more source

Test Methodology for Short-Circuit Assessment and Safe Operation Identification for Power SiC MOSFETs

Energies
The short-circuit (SC) immunity of power silicon carbide (SiC) MOSFETs is critical for high-reliability applications, where robust monitoring and protection strategies are essential to ensure system safety.
Joao Oliveira, Jean-Michel Reynes, Hervé Morel, Pascal Frey, Olivier Perrotin, Laurence Allirand, Stéphane Azzopardi, Michel Piton, Fabio Coccetti   +8 more
doaj   +1 more source

Test scoring - classical, IRT, and approximated IRT methods [PDF]

, 2011
Lecture slides for Test scoring - classical, IRT, and approximated IRT ...
Böhnke, Jan, Štochl, Jan, Croudace, Tim, Brown, Anna   +3 more
core   +1 more source

Fitting Test for Logistic Function in Defining the Ability Level and Ranking in Exams [PDF]

Fanāvarī-i āmūzish, 2009
In this paper with using the three- parameter logistic function in response to 4  choice items, the range of ability of each participant for each item or each exam is measured by Item response theory (IRT) and is marked and ranked by each participant’s ...
K. Aghigh
doaj   +1 more source

Construct Validity of Computer-Based Physics Test (CBPsyT) Through Confirmatory and Item Response Theory: A Complementary Approach to Test Development

Educational Process: International Journal
Background/purpose. This study aims to validate the computer-based physics test (CBPsyT) construct through confirmatory factor analysis (CFA) to ensure that CBPsyT is suitable for its intended use.
Godelfridus Hadung Lamanepa , Edi Istiyono , Raden Rosnawati, Ayen Arsisari, Fitriyani Hali   +4 more
doaj   +1 more source