Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "Noura, A." wg kryterium: Autor

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-4 z 4
    Tytuł:
    Contribution to the maintenance of T4 BH drilling machine (Case of the mine of Boukhadra, Algeria)
    Autorzy:
    Zoubir, A.
    Yamina, N.
    Noura, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/89062.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
    Tematy:
    FEMA method
    Pareto diagram
    cause-effect diagram
    drill machine
    mine
    Opis:
    The current paper presents the study of applying the FEMA method to the drill T4 BH. The research focused on the risk indicators used in the FEMA method. Pareto diagram for the description of the frequency and importance of causes that may cause a problem were applied. With participative method of brainstorming information was gathered concerning the failures that can occur in the drill machine T4BH, their causes and their effects, as well as preventive and error detection methods. The information was then processed by means of different quality instrument (cause-effect diagram) resulting in a ranking of risk coefficient used in the FMEA method.
    Źródło:
    Mining Science; 2017, 24; 73-83
    2300-9586
    2353-5423
    Pojawia się w:
    Mining Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Systematic fault tolerant control based on adaptive Thau observer estimation for quadrotor UAVs
    Autorzy:
    Cen, Z.
    Noura, H.
    Younes, Y. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/329914.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    systematic fault tolerant control
    fault estimation
    adaptive Thau observer
    fault tolerant capacity boundaries
    time varying fault
    sterowanie tolerujące uszkodzenia
    estymacja błędu
    Opis:
    A systematic fault tolerant control (FTC) scheme based on fault estimation for a quadrotor actuator, which integrates normal control, active and passive FTC and fault parking is proposed in this paper. Firstly, an adaptive Thau observer (ATO) is presented to estimate the quadrotor rotor fault magnitudes, and then faults with different magnitudes and time-varying natures are rated into corresponding fault severity levels based on the pre-defined fault-tolerant boundaries. Secondly, a systematic FTC strategy which can coordinate various FTC methods is designed to compensate for failures depending on the fault types and severity levels. Unlike former stand-alone passive FTC or active FTC, our proposed FTC scheme can compensate for faults in a way of condition-based maintenance (CBM), and especially consider the fatal failures that traditional FTC techniques cannot accommodate to avoid the crashing of UAVs. Finally, various simulations are carried out to show the performance and effectiveness of the proposed method.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2015, 25, 1; 159-174
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of passive fault-tolerant controllers of a quadrotor based on sliding mode theory
    Autorzy:
    Merheb, A. R.
    Noura, H.
    Bateman, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/331358.pdf
    Data publikacji:
    2015
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    quadrotor UAV control
    fault tolerant control
    sliding mode control
    cascaded SMC
    bio inspired gain tuning
    Opis:
    In this paper, sliding mode control is used to develop two passive fault tolerant controllers for an AscTec Pelican UAV quadrotor. In the first approach, a regular sliding mode controller (SMC) augmented with an integrator uses the robustness property of variable structure control to tolerate partial actuator faults. The second approach is a cascaded sliding mode controller with an inner and outer SMC loops. In this configuration, faults are tolerated in the fast inner loop controlling the velocity system. Tuning the controllers to find the optimal values of the sliding mode controller gains is made using the ecological systems algorithm (ESA), a biologically inspired stochastic search algorithm based on the natural equilibrium of animal species. The controllers are tested using SIMULINK in the presence of two different types of actuator faults, partial loss of motor power affecting all the motors at once, and partial loss of motor speed. Results of the quadrotor following a continuous path demonstrated the effectiveness of the controllers, which are able to tolerate a significant number of actuator faults despite the lack of hardware redundancy in the quadrotor system. Tuning the controller using a faulty system improves further its ability to afford more severe faults. Simulation results show that passive schemes reserve their important role in fault tolerant control and are complementary to active techniques.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2015, 25, 3; 561-576
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of electronic gaming on upper limb neuropathies among esports athletes
    Autorzy:
    Basuodan, Reem M.
    Aljebreen, Aljoharah W.
    Sobih, Hetaf A.
    Majrashi, Kholoud A.
    Almutairi, Noura H.
    Alhaqbani, Sadeem S.
    Alanazy, Mohammed H.
    Powiązania:
    https://bibliotekanauki.pl/articles/23385100.pdf
    Data publikacji:
    2023-11-14
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    carpal tunnel syndrome
    upper extremity
    esports athletes
    computer games
    neuropathies
    hand symptoms
    Opis:
    Background The authors aimed to explore carpal tunnel syndrome (CTS) among electronic sports (esports) athletes, to compare hand symptoms and their severity between esports athletes and the control group and within the esports athletes, and to study the relationship between esports athletes’ variables. Material and Methods A cross-sectional survey study via telephone with systematic randomized approach was used for esport athletes sampling. Control group were non-esports athletes who do not use computer for prolonged duration. The survey consisted of sports athletes’ characteristics, hand symptoms and functions, and the Boston Carpal Tunnel Questionnaire (BCTQ). The unpaired student’s t-test, Mann-Whitney U test, and χ2 test were utilised for statistical comparison, with p < 0.05. Pearson’s and Spearman’s correlation coefficient tests were used for relationship analyses. Results Eligible participants were 198 out of 229. Compared to control group, esport athletes reported more CTS (p = 0.01), and radiated pain and numbness in their hands (p = 0.05). Males complained of hand symptoms (p < 0.01) and its radiation (p < 0.01) more than females among esports athletes. Higher BCTQ Symptom Severity Scale (BCTQ-SSS) scores were reported for esports athletes who had been playing esports for prolonged periods compared to those who had playing recently (p = 0.003), with a moderate positive correlation (+0.59, p = 0.004). A significant moderate positive correlation was reported for BCTQ Functional Severity Symptoms (BCTQ-FSS) scores in terms of hours of playing (+0.44, p = 0.04). Esports athletes who used armrests and a PC with a controller for gaming reported less hand symptoms and had milder BCTQ scores than those who used a PC with a keyboard/mouse. Generally, esports athletes spend 5–10 h/day on gaming. Conclusions Esports athletes might be at risk of developing upper-extremity nerve compression and CTS. Prolonged playing, hours of playing, type of esports device, and using armrests are possible risk factors.
    Źródło:
    Medycyna Pracy. Workers’ Health and Safety; 2023, 74, 4; 279-287
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy. Workers’ Health and Safety
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies