Yazar "Lorenzini, Giulio" seçeneğine göre listele

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    Optimal backstepping-fopıd controller design for wheeled mobile robot
    (International Information and Engineering Technology Association, 2022) Euldji, Rafik; Batel, Noureddine; Rebhi, Redha; Kaid, Noureddine; Tearnbucha, Chutarat; Sudsutad, Weerawat; Lorenzini, Giulio; Ahmad, Hijaz; Ameur, Houari; Menni, Younes
    A design of an optimal backstepping fractional order proportional integral derivative (FOPID) controller for handling the trajectory tracking problem of wheeled mobile robots (WMR) is examined in this study. Tuning parameters is a challenging task, to overcome this issue a hybrid meta-heuristic optimization algorithm has been utilized. This evolutionary technique is known as the hybrid whale grey wolf optimizer (HWGO), which benefits from the performances of the two traditional algorithms, the whale optimizer algorithm (WOA) and the grey wolf optimizer (GWO), to obtain the most suitable solution. The efficiency of the HWGO algorithm is compared against those of the original algorithms WOA, GWO, the particle swarm optimizer (PSO), and the hybrid particle swarm grey wolf optimizer (HPSOGWO). The simulation results in MATLAB–Simulink environment revealed the highest efficiency of the suggested HWGO technique compared to the other methods in terms of settling and rise time, overshoot, as well as steady-state error. Finally, a star trajectory is made to illustrate the capability of the mentioned controller
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    Simulation Investigation of Natural Ventilation on the Thermal Comfort in Arid Regions: Case Ghardaïa
    (International Information and Engineering Technology Association, 2022) Kaddour, Abdelmadjid; Bezari, Salah; Tearnbucha, Chutarat; Sudsutad, Weerawat; Lorenzini, Giulio; Ahmad, Hijaz; Menni, Younes
    Building aeration ventilation may contribute to achieve thermal comfort there by economizing huge amount of electricity that would be supplied using conventional air conditioning systems. Natural ventilation maintains thermal equilibrium between heating and cooling balances. They may also be used in conjunction with other systems in certain circumstances. Model governing equation of physical phenomena enabling description the thermo-aeraulic behaviour. Based on the measurements in winter and summer periods of several physical parameters like the wind velocity and the ambient temperature, the influence of infiltration rate on the thermal comfort were demonstrated. The present study is the simulation investigation the evolution of internal multi-zone temperature of Saharan building in Ghardaïa (32°38 N, 3°78 E), Algeria. Building construction process should take advantage of many practices characterizing location traditional construction. Specifically, satisfaction of seasonal thermal comfort requirement (heating, cooling) and favour maximum solar passive gains. The results showed that the major factor for the reduction of the internal temperature of the studied building is the natural ventilation including the thermal comfort range (20-27)?.
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    Study of the effect of ACL anode catalytic layer porosity on the efficiency of a direct methanol fuel cell
    (International Information and Engineering Technology Association, 2022) Medkour, Mihoub; Kaid, Noureddine; Ameur, Houari; Tearnbucha, Chutarat; Sudsutad, Weerawat; Lorenzini, Giulio; Ahmad, Hijaz; Menni, Younes
    The current work investigates the efficiency of a Direct Methanol Fuel Cell (DMFC) by using COMSOL. The set-up model takes into consideration the electrochemical kinetics and chemical reactions. The anode catalyst layers are a main element in the PEM fuel cell; their porosity significantly affects the fuel cell efficiency. We focus on the impact of catalytic layers porosity on the battery efficiency. As claimed by the results, the porosity of catalytic layer greatly affects the performance of the battery. In addition, better output performance of µDMFC may be obtained when the catalytic layer porosity is chosen as ?ACL=0.009-0.1. The distributions of methanol, carbon dioxide, water, oxygen, polarization, and the current density are plotted to highlight the impact of porosity on the global performances.