Results 21 to 30 of about 25,214 (257)

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

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

Comparison between pystan and numpyro in Bayesian item response theory: evaluation of agreement of estimated latent parameters and sampling performance [PDF]

PeerJ Computer Science, 2023
Purpose The purpose of this study is to compare two libraries dedicated to the Markov chain Monte Carlo method: pystan and numpyro. In the comparison, we mainly focused on the agreement of estimated latent parameters and the performance of sampling using
Mizuho Nishio, Eiji Ota, Hidetoshi Matsuo, Takaaki Matsunaga, Aki Miyazaki, Takamichi Murakami   +5 more
doaj   +2 more sources

DFT-based low-complexity optimal cell ID estimation in NB-IoT

EURASIP Journal on Advances in Signal Processing, 2020
This paper deals with cell identifier (ID) estimation for narrowband-Internet of things (NB-IoT) system. It is suggested to transform the usual maximum likelihood (ML) estimator expression in order to highlight a discrete Fourier transform (DFT), which ...
Vincent Savaux
doaj   +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

Fixed Effects IRT Model

Behaviormetrika, 2006
A fixed effect item response theory (IRT) model is developed for modeling group specific item parameters. Two applications are presented. The first application is that the proposed model can be used to detect whether a response mechanism is ignorable using the splitter item technique.
Fox, Jean-Paul, Pimentel, Jonald, Glas, Cees   +2 more
openaire   +2 more sources

PARAMETRIC IDENTIFICATION IN KNOWLEDGE ESTIMATION MODELING

Вестник Российского экономического университета имени Г. В. Плеханова, 2017
The assessment of quality of training is the cornerstone of processes of stimulation of educational activity of the student, quality management of training, management of training as process of development of new knowledge etc.
Irina N. Maslyakova, Ekaterina P. Mochalina   +1 more
doaj   +1 more source

Interchangeability between factor analysis, logistic IRT, and normal ogive IRT

Frontiers in Psychology, 2023
In existing studies, it has been argued that factor analysis (FA) is equivalent to item response theory (IRT) and that IRT models that use different functions (i.e., logistic and normal ogive) are also interchangeable. However, these arguments have weak links. The proof of equivalence between FA and normal ogive IRT assumes a normal distribution.
openaire   +3 more sources

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

A reduced order model to assist welding parameter setup

Mechanics & Industry
This article demonstrates the time saving in industrial process setup using numerical reduced order modelling (ROM). The numerical simulations may supply useful information to design manufacturing processes but are often time consuming and then not ...
Le Guennec Yves, Morville Simon
doaj   +1 more source