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Douiri M.R.,Sina | Cherkaoui M.,Sina | Essadki A.,Normal Superior School of Technical Education Oran
International Journal of Circuits, Systems and Signal Processing

In this paper the genetic algorithms is applied to automate and optimize the fuzzy controller design process. To do this, the normalization parameters, membership functions and decision table are converted into binary bit string. This optimization requires a predefined objective function. The task of such a design algorithm is the modification of the existing knowledge and at the same time, the investigation of new feasible structures. The proposed approach in this paper is employed for the speed control of an induction motor drive with indirect field oriented control. Source

Loumi-Fergane H.,Oran University of Science and Technology - Mohamed Boudiaf | Belaidi A.,Normal Superior School of Technical Education Oran
International Journal of Geometric Methods in Modern Physics

The aim of this work is twofold: First, we extend the multisymplectic geometry already done for field theories to the relativistic mechanics by introducing an appropriate configuration bundle. In particular, we developed the model to obtain the Hamilton-De Donder-Weyl equations to the movement of a relativistic charged particle immerged in an electromagnetic field. Second, we have found a direct relationship between the multisymplectic geometry and the k-cosymplectic structure of a physical system. © 2013 World Scientific Publishing Company. Source

Benstaali W.,University of Mostaganem | Bentata S.,University of Mostaganem | Abbad A.,University of Mostaganem | Belaidi A.,Normal Superior School of Technical Education Oran
Materials Science in Semiconductor Processing

The full potential linear augmented plane wave (FPLAPW) based on density-functional theory (DFT) is employed to study the electronic, magnetic and optical properties of some transition metals doped ZnSe. Calculations are carried out by varying the doped atoms. Five 3d transition elements were used as a dopant: Cr, Mn, Fe, Co and Cu in order to induce spin polarization. Our results show that, Mn and Cu-doped ZnSe could be used in spintronic devices only if additional dopants are introduced; on the contrary, transition elements showing delocalized quality such as Cr, Fe and Co doped ZnSe might be promising candidates for application in spintronics. In addition, the three materials (CrZnSe, FeZnSe and CoZnSe) are half-metallic and ferromagnetic with an important magnetic moment ranging from 3 μB to 4 μB. Furthermore, we have computed optical properties of pure ZnSe, CrZnSe, FeZnSe and CoZnSe, and found a pronounced peak occurring at low energies in all the optical curves due to TM impurity and a low difference between doped and undoped compounds for higher energies. © 2012 Elsevier Ltd. Source

Khiat M.,Normal Superior School of Technical Education Oran | Marano A.,Universidad Politecnica de Ingenieria
International Review of Electrical Engineering

In this paper aims at the study of an Interior Point Method (IPM) based on the logarithmic-Barrier Primal-Dual Algorithm (LB-PDA), for Nonlinear Programming (NLP). The total active power loss minimization is formulated as an Optimal Reactive Power Flow (ORPF), including equality and inequality constraints which represent the power system security conditions. It is shown that this optimization method has very attractive features to solve the Var/voltage problems. Finally, some results obtained with various simulations for a real transmission power system are presented. © 2010 Praise Worthy Prize S.r.l. - All rights reserved. Source

Amri A.,Polytechnic School of Algiers | Saidane A.,Normal Superior School of Technical Education Oran | Pulko S.,University of Hull
Computers in Biology and Medicine

Breast thermography is a non-invasive tool for early detection of breast cancer. It was subject for many years to some controversial issues regarding its efficiency. Advances in infrared camera technology and progress in image processing systems had brought thermal breast imaging back as a valid tool for mammography. Numerical modelling of heat transfer within a woman breast is being an attractive tool that may reveal the conditions under which tumours can be detected in a thermogram. The aim of this work is to use the transmission line matrix (TLM) to model a regular three-dimensional breast with embedded tumour and analyse sensitivity parameters. © 2010 Elsevier Ltd. Source

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