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    Wyświetlanie 1-4 z 4
    Tytuł:
    Model badania potwierdzającego niezawodność dla dwumianowych systemów o rosnącej niezawodności
    Reliability demonstration test model for binomial systems with reliability growth
    Autorzy:
    Wu, X.
    Liu, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/301072.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
    Tematy:
    system dwumianowy
    badanie potwierdzające
    dyskretny model wzrostu niezawodności
    binomial system
    demonstration test
    discrete reliability growth model
    Opis:
    Wiele złożonych systemów inżynieryjnych przechodzi proces wzrostu niezawodności w kolejnych etapach badań. Większość istniejących modeli badań potwierdzających niezawodność nie uwzględnia jednak wzrostu niezawodności. W niniejszym artykule przedstawiono model badania niezawodności dla systemów dwumianowych o 2 etapach testowych, który bierze pod uwagę możliwy wzrost niezawodności. Określono wskaźniki prawdopodobieństwa dla różnych możliwych sytuacji oraz wyprowadzono statystyczne reguły decyzyjne. Podany przykład ilustruje względnie niższe ryzyko decyzyjne proponowanego modelu w stosunku do tego, jakie niosą klasyczne modele badań.
    Many complex engineering systems experience reliability growth in successive test stages. In most existing reliability demonstration test models, reliability growth is not incorporated. In this paper, for binomial systems with 2 test stages, a reliability demonstration test model is presented that takes possible reliability growth into consideration. Likelihood ratios are defi ned for various possible situations, and statistical decision rules are derived. With a given example, the relative lower decision risk of the proposed model is illustrated by comparison with that of classical demonstration test models.
    Źródło:
    Eksploatacja i Niezawodność; 2010, 2; 55-58
    1507-2711
    Pojawia się w:
    Eksploatacja i Niezawodność
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Continuous descent approach : noise test for Warsaw international airport
    Autorzy:
    Gągorowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/247891.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    Continuous Descent Approach
    CDA concept
    aircraft type
    air transport
    demonstration test
    noise pollution
    noise environmental protection
    Opis:
    The noise generated by aircraft during departure and arrival flight operations continues to be significant problem at most major airports. Environmental impacts due to aviation operations in the vicinity of airports have become a serious concern to the community. A variety of techniques can be employed to reduce the noise impacts of aircraft. Continuous Descent Approach (CDA) is the new promising technique, which can significantly reduce noise impact by keeping aircraft higher and at lower engine thrust for longer by eliminating the level segments in conventional "step down" approaches. These procedures (implemented in different ways) are fixed routes that are vertically optimized. With the changing traffic, conditions and variable noise abatement rules the benefits of CDA operations are not yet fully realized. Actually, at many airports, CDA techniques are implemented for environmental improvements. This article presents the concept of optimized CDA. The modified flight procedure has been shown in measurement and analysis for Warsaw International Airport example. In this demonstration test, the procedure was shown to reduce the A-weighted noise level for the selected location along the flight path for different aircraft. Depending on aircraft type, the noise benefit from a CDA compared to a conventional approach was up to about 9.5 decibels (this change is noticeable to the human ear). Measurements have shown that Continuous Descent Approach have the potential for significant environmental benefits including reductions in noise.
    Źródło:
    Journal of KONES; 2012, 19, 2; 167-174
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Isokinetic Muscle Function and Anaerobic Exercise Capacity in the Knee According to Kukki Taekwondo Training Type
    Autorzy:
    Kang, Jonghyeon
    Park, Jusik
    Johnson, John Arthur
    Powiązania:
    https://bibliotekanauki.pl/articles/1933104.pdf
    Data publikacji:
    2021-08-20
    Wydawca:
    PPHU Projack Jacek Wąsik
    Tematy:
    gyorugi (sparring)
    Taekwondo demonstration
    anaerobic capacity
    Wingate test
    poomsae (forms)
    Opis:
    Introduction: This study's purpose was to measure and compare isokinetic muscle function and anaerobic exercise capacity of knee joints according to the three Kukki Taekwondo competition types. Methods: A total of 21 elite Korean male poomsae (forms), gyorugi (sparring), and demonstration athletes majoring in Taekwondo were selected as the subjects of the study. Subjects' physical fitness levels were measured using standardized strength, endurance, agility, balance, and flexibility tests. In particular, the isokinetic muscle function measurement system was used to measure the muscle function of subjects' knee joints, and the Wingate test was used to measure their anaerobic exercise ability. Results: Gyorugi athletes showed better results than their poomsae and demonstration counterparts in nearly all metrics, including body composition, physical fitness factors, isokinetic muscle function (60°/sec), muscle power (180°/sec), and anaerobic exercise capacity. Gyorugi athletes were also taller and showed higher muscle mass, strength, muscular endurance, and agility. However, poomsae athletes showed a higher level of flexibility. The results found isokinetic muscle function and anaerobic exercise capacity of the knee joint to be most important for gyorugi athletes and then for demonstration and poomsae athletes, in that order. Conclusions: This study provides useful information needed to identify the physical fitness factors of the different Kukki Taekwondo athletes, and, in turn, it is may serve as important fundamental data for developing future systematic Taekwondo training programs.
    Źródło:
    Physical Activity Review; 2021, 2, 9; 40-55
    2300-5076
    Pojawia się w:
    Physical Activity Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The application of information and communication technologies in teaching vocational subject Electrotechnics
    Autorzy:
    ĎURIŠ, Milan
    BENDÍK, Miloš
    Powiązania:
    https://bibliotekanauki.pl/articles/455879.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Rzeszowski
    Tematy:
    project KEGA
    interaction
    interactive board
    hypothesis
    presentation
    creativity
    electronics
    demonstration workbook non-standardized didactic
    test
    Opis:
    New trends in education are one of the priorities of each educational institution. Quality, technical equipment of schools, knowledgeable educators, but above all the effort of leadership, whether the management to generate qualitative and innovative environment for teachers and pupils, is a guarantee of higher levels of education and subsequently, to education. Information-communication technologies (ICT) are increasingly becoming a part of not only the General, but also for vocational education. New technology, computer technology and software are intended to help in improving the level of creative abilities of teachers and students, which is the output of the qualitative growth of the pupil, and then the society. The contribution demonstrates several ways of using ICT and the associated interaction during class of Electrotechnics using whiteboard, presentation or demonstration workbook. Efficiency and quality of this teaching hours, is then compared with the traditional teaching. The relevant contribution is a stimulus to creativity of teachers and educators to provide students the highest possible quality of education that schools provide.
    Źródło:
    Edukacja-Technika-Informatyka; 2014, 5, 2; 201-212
    2080-9069
    Pojawia się w:
    Edukacja-Technika-Informatyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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