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Constantin, Algeria

Kebaili S.,University of Oum El Bouaghi | Benalla H.,Constantine1 University
Journal of Electrical Engineering | Year: 2014

System power reliability under varying weather conditions and the corresponding system cost are the two main concerns for designing stand alone photovoltaic systems (SAPV). An energy cost evaluation of a SAPV using sinusoidal profile is developed. This paper presents, for a first time, the more accurate mathematic models for characterizing PV module, battery and converters (DC/DC and DC/AC). Secondly, a methodology for studying the impact profile load parameters on the energy cost of an SAPV is proposed. Two cases are considered, unitary and constant efficiencies. The results obtained give the minimum energy cost and downsizing of the system during 30 years of the life cycle for each case.

Mezdour D.,Jijel University | Tabellout M.,CNRS Le Mans Institute of Molecules and Materials | Bardeau J.F.,CNRS Le Mans Institute of Molecules and Materials | Sahli S.,Constantine1 University
2014 North African Workshop on Dielectric Materials for Photovoltaic Systems, NAWDMPV 2014 | Year: 2014

The present work deals with the preparation of films from polymeric core-shell particles. Our approach is based on the chemical polymerization of a very thin layer of polyaniline (PANI) around particles of transparent polymers (polyamide and polystyrene). Films are then obtained by dissolving the two type synthesized core-shell powders in dichloromethane and m-Cresol respectively. Electrical properties were investigated using a dielectric relaxation spectrometer. Both composite films exhibited a percolative behaviour and a well established dc conductivity for high PANI concentration related to the conductive properties of the PANI spanning clusters. This property allows using such films in semi-conductive applications. For polyamide films, high dielectric constants were obtained at 5 wt. % of PANI allowing their use as high k-dielectrics compatibles with organic printed circuit boards. © 2014 IEEE.

Benzaid K.,Constantine1 University | Mansouri N.,Constantine1 University | Labbani-Igbida O.,University of Picardie Jules Verne
2013 3rd International Conference on Systems and Control, ICSC 2013 | Year: 2013

In this paper, we present two control strategies of a quadrotor Unmanned Aerial Vehicle (UAV). The dynamics of the system is controlled to achieve a complex trajectory tracking. A controller using the integral backstepping is developed for the stabilization of the six degrees of freedom (6DoF) of the system. Furthermore, we propose a hybrid strategy by combining the integral backstepping and the PID linear controller. For this, we divide the dynamic system into two subsystems; each one with 3DoF. For the stabilization of the rotational dynamics, the PID controller is proposed. The Integral Backstepping is applied for the longitudinal, lateral and vertical position stabilization. Finally, some numerical simulations are conducted to illustrate the robustness of both strategies. © 2013 IEEE.

Taouche C.,University of Oum El Bouaghi | Taouche C.,Constantine2 University | Batouche M.C.,University of Oum El Bouaghi | Chemachema M.,Constantine1 University | And 2 more authors.
STA 2014 - 15th International Conference on Sciences and Techniques of Automatic Control and Computer Engineering | Year: 2014

Face recognition is one of the most important tasks in computer vision and biometrics where many algorithms have been developed. The Local Binary Pattern (LBP) has been proved to be effective for facial image representation and analysis, but it is too local to be robust. In this paper, we present an improved method for face recognition named Elongated Multi-Block Local Ternary Pattern (EMBLTP), which is based on Local Binary Pattern (LBP).The proposed method is tested on Yale face database and compared with different variants of LBP. Experimental results show that, the classification rate of the proposed method is appreciable. © 2014 IEEE.

Sief Ali S.,Constantine1 University | Pruski A.,Lorrain University | Abdelhak B.,Constantine1 University
2013 3rd International Conference on Systems and Control, ICSC 2013 | Year: 2013

The study of vehicle navigation in constrained space depends on both the mobile base and on the assigned task. However, it always leads to considering the problem in term of path finding in the admissible space. In this paper, we demonstrate the existence of a feasible trajectory for person on wheelchair during the assessment of accessibility of habitat. The objective is to evaluate the accessibility to the mobility and to the reachability. The calculation of the trajectory for a person in wheelchair is not necessary because he/she always executes a trajectory that seems to him the most comfortable. According to that, we just prove the existence of at least one feasible trajectory for wheelchair. © 2013 IEEE.

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