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Pollution detection for the singular linear parabolic equation
Iqbal M. Batiha,Imad Rezzoug,Taki-Eddine Oussaeif,Adel Ouannas,Iqbal H. Jebril 한국전산응용수학회 2023 Journal of applied mathematics & informatics Vol.41 No.3
In this work, we are concerned by the problem of identification of noisy terms which arise in singular problem as for remote sensing problems, and which are modeled by a linear singular parabolic equation. For the reason of missing some data that could be arisen when using the traditional sentinel method, the later will be changed by a new sentinel method for attaining the same purpose. Such new method is a particular least square-like method which permits one to distinguish between the missing terms and the pollution terms. In particular, a sentinel method will be given here in its more realistic setting for singular parabolic problems, where in this case, the observation and the control have their support in different open sets. The problem of finding a new sentinel is equivalent to finding singular optimality system of the least square control for the parabolic equation that we solve.
Tekkouk Nazih,Arbaoui Mohamed,Abdi Saîd,Rezzoug Amine 한국물리학회 2020 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.76 No.10
Aluminium alloys are gradually replacing grey cast iron in the automotive industry thanks to its low density. The purpose of this study is to evaluate tribological properties of 2024A anodized aluminium alloy under severe wear conditions. For this aim we are investigating the effect of the sliding speed and the anodic layer in order to improve the wear resistance and friction properties of 2024A aluminium alloy and this by using the latter with the hard metal chrome steel 100C6 in dry punctual contact. So we shall evaluate hardness, wear rate and friction properties after and before the anodizing process. The results have shown that the sliding speed affects a transition from severe wear to mild wear when u = 0.3 m/s for the alloy covered by hard anodic layer, as well as it was a significant decrease in wear rate.
HYBRID LIGHT DUTY VEHICLES EVALUATION PROGRAM
Trigui, R.,Badin, F.,Jeanneret, B.,Harel, F.,Coquery, G.,Lallemand, R.,Ousten, JP.,Castagne, M.,Debest, M.,Gittard, E.,Vangraefshepe, F.,Morel, V.,Baghli, L.,Rezzoug, A.,Labbe, J.,Biscalia, S. The Korean Society of Automotive Engineers 2003 International journal of automotive technology Vol.4 No.2
A HEV evaluation program, funded by ADEME, was carried out by a group of Laboratories of different specialties in order to evaluate and compare consumption, emission and component technologies of the three first HEVs put on the market (Toyota Prius, Nissan Tino and Honda Insight). This paper presents the results obtained until now. These results show good consumption and emission performance of the tested vehicles compared to conventional ones. The energy management seems to be globally the same for the three vehicles excepting for cold stans where the Insight allows a very earlier stop of the engine compared to the Tino and especially to the Prius. A mapping of the engine consumption of the Prius and the Insight was performed in order to furnish data for the simulation models. The Permanent Magnet motors of the Prius and Tino have different number of pair poles and then different emf at a given speed. The low emf values of the Prius allow operation at high speed with less field weakening control than for the Tino. The inverters of the Prius and the Tino, controlled by a PWM at respectively 5 kHz and 7 kHz switching frequency, are made of IGBTs with high commutation performances.
HYBRID LIGHT DUTY VEHICLES EVALUATION PROGRAM
R. TRIGUI,F. BADIN,B. JEANNERET,F. HAREL,G. COQUERY,R. LALLEMAND,JP. OUSTEN,M. CASTAGNE,M. DEBEST,E. GITTARD,F. VANGRAEFSHEPE,V. MOREL,L. BAGHLI,A.REZZOUG,J.LABBE,S. BISCAGLIA 한국자동차공학회 2003 International journal of automotive technology Vol.4 No.2
A HEV evaluation program, funded by ADEME, was carried out by a group of Laboratories of different specialties in order to evaluate and compare consumption, emission and component technologies of the three first HEVs put on the market (Toyota Prius, Nissan Tino and Honda Insight). This paper presents the results obtained until now. These results show good consumption and emission performance of the tested vehicles compared to conventional ones. The energy management seems to be globally the same for the three vehicles excepting for cold starts where the Insight allows a very earlier stop of the engine compared to the Tino and especially to the Prius. A mapping of the engine consumption of the Prius and the Insight was performed in order to furnish data for the simulation models. The Permanent Magnet motors of the Prius and Tino have different number of pair poles and then different emf at a given speed. The low emf values of the Prius allow operation at high speed with less field weakening control than for the Tino. The inverters of the Prius and the Tino, controlled by a PWM at respectively 5 kHz and 7 kHz. switching frequency, are made of IGBTs with high commutation performances.