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Wyszukujesz frazę "multilevel approach" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
From exploratory research to structural models: A multilevel lexical approach to studying the image of marketing objects
Autorzy:
Kolańska-Stronka, Magdalena
Gorbaniuk, Oleg
Wilczewski, Michał
Powiązania:
https://bibliotekanauki.pl/articles/1374223.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:
structural model
image
marketing object
lexical research
multilevel approach
Opis:
The key problem in studies of marketing objects (e.g., brands, political parties) is the lack of agreement on the universal dimensions through which such objects are perceived, as well as on methodologies allowing their identification. As a result, researchers often use structural models (and instruments) that lack ecological validity. We offer a solution to that problem by presenting a methodology that draws on lexical research and which has allowed researchers to establish universal dimensions of personality perception in psychology. By discussing the theoretical and methodological tenets of the multilevel lexical approach to exploring images of marketing objects, we also overcome another problem of neglecting the hierarchical structure of the phenomena and data.
Źródło:
Przegląd Wschodnioeuropejski; 2020, XI, 2; 131-143
2081-1128
Pojawia się w:
Przegląd Wschodnioeuropejski
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Importance and dimensions of ESL in Poland – school staff’s perception
Autorzy:
Paulina, Marchlik,
Hanna, Tomaszewska-Pękała,
Powiązania:
https://bibliotekanauki.pl/articles/892627.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warszawski. Wydawnictwa Uniwersytetu Warszawskiego
Tematy:
early school leaving
multilevel/tripartite approach
reproduction theory
resilience
risk and protective factors
Opis:
Early school leaving (ESL) is an issue of serious concern of the European Union as one of the factors contributing to youth unemployment, poverty and low educational achievement (Commission of the European Communities 2001: 39). In Poland, however, the phenomenon is not perceived as a problem or a major challenge for the Polish education system for the future. Poland, having one of the lowest ESL rates among EU countries (about 5%), is mentioned among the countries which are already achieving the EU benchmark 2010 of less than 10% of ESLers (GHK 2005: 7). The theoretical approach (called: multilevel or tripartite approach) applied in the RESL.eu project assumes that the falling out of education is a complex process, which has as its core three levels of overlapping factors: the individual, the institutional and the structural/systemic ones. In this article we look at how the phenomenon of early school leaving is perceived by the staff of upper secondary schools in Warsaw. We present the results of analysis of individual interviews with principals, teachers, psychologists and pedagogical counsellors which took place in four schools situated in Praga and Targówek districts. We argue that the staff from upper secondary schools, explaining the determinants of ESL, stress the significance of the micro level factors, referring to their everyday experiences in working with students experiencing school failure, or focus on the systemic/macro level factors and emphasise the shortcomings of the Polish education system, seeking possible sources in its deficiencies. Whereas the factors of the institutional, that is school level, are dismissed as relevant aspects that may help to explain this phenomenon.
Źródło:
Kwartalnik Pedagogiczny; 2016, 61(4 (242)); 156-169
0023-5938
Pojawia się w:
Kwartalnik Pedagogiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integer factor based SVPWM approach for multilevel inverters with continuous and discontinuous switching sequences
Autorzy:
Suresh, Kumar Anisetty
Sri, Gowri Kolli
Nagaraja, Rao Sulake
Manjunatha, Budagavi Matam
Sesi, Kiran Ponnapati
Niteesh, Kumar K.
Powiązania:
https://bibliotekanauki.pl/articles/1955193.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
integer factor approach
inverters
multilevel inverters
optimum switching sequence
space vector modulation
SVPWM
metoda współczynnika całkowego
inwertery
inwertery wielopoziomowe
optymalna sekwencja przełączania
modulacja wektora przestrzeni
Opis:
The most extensively employed strategy to control the AC output of power electronic inverters is the pulse width modulation (PWM) strategy. Since three decades modulation hypothesis continues to draw considerable attention and interest of researchers with the aim to reduce harmonic distortion and increased output magnitude for a given switching frequency. Among different PWM techniques space vector modulation (SVM) is very popular. However, as the number of output levels of the multilevel inverter (MLI) increases, the implementation of SVM becomes more difficult, because as the number of levels increases the total number of switches in the inverter increases which will increase the total number of switching states, which will result in increased computational complexity and increased storage requirements of switching states and switching pulse durations. The present work aims at reducing the complexity of implementing the space vector pulse width modulation (SVPWM) technique in multilevel inverters by using a generalized integer factor approach (IFA). The performance of the IFA is tested on a three-level inverter-fed induction motor for conventional PWM (CPWM) which is a continuous SVPWM method employing a 0127 sequence and discontinuous PWM (DPWM) methods viz, DPWMMIN using 012 sequences and DPWMMAX using a 721 sequence.
Źródło:
Archives of Electrical Engineering; 2021, 70, 4; 859-872
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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