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’Aïn el Bell, Algeria

Kadri F.,University dOuargla | Drid S.,University of Batna | Djeffal F.,University of Batna | Chrifi-Alaoui L.,CNRS Laboratory of Technology and Innovation
2013 8th International Conference and Exhibition on Ecological Vehicles and Renewable Energies, EVER 2013 | Year: 2013

These days, electrical drives generally associate inverter and induction machine. Thus, these two elements must be taken into account in order to provide a relevant diagnosis of these electrical systems. The aim of this paper is to study the feasibility of fault detection and diagnosis in a three-phase inverter feeding an induction motor. The proposed approach is a neural network classification applied to the fault diagnosis of a field oriented drive of induction motor. Multilayer perception (MLP) networks are used to identify the type and location of occurring fault using the stator Concordia mean current vector. In the case of a single fault occurrence, a localization domain made with seven patterns is built. With the possibility of occurrence of two faults simultaneously, there are twenty-two different patterns. Simulated experimental results on 1.5-kW induction motor drives show the effectiveness of the proposed approach with a classification performance over than 95%. © 2013 IEEE.

Boudjema A.M.,University of Guelma | Samraoui F.,University of Guelma | Youcefi A.,University of Guelma | Djelailia A.,University of Guelma | And 6 more authors.
Alauda | Year: 2011

Safîoune is the second breeding site found in the Sahara and the third one of the Greater Flamingo Phoenicopterus roseus recorded in Algeria. An estimated 1500 breeding pairs bred successfully in winter and spring 2011. Despite the drying out of the saltpan attack of Golden Jackals Canis aureus, 600 chicks fledged. Nesting birds originatedfrom Algeria, France, Italy and Spain, thus confirming the connectivity of this Algerian breeding site with otlier sites within the Mediterranean area. A ringing operation was set up and 62 chicks were successfully ringed with Darvic plastic rings.

Mehani M.,University dOuargla | Mehani M.,University dOuargla | Bissati S.,University dOuargla | Bissati S.,University dOuargla | And 2 more authors.
Journal of Materials and Environmental Science | Year: 2012

Two hydric parameters were studied in this work, in relation with salt stress tolerance, i.e. turgescence and transpiration, in young plants of Atriplex canescens. We determined the relative water content (RWC or TRE) or turgescence and relative water loss by transpiration (RWL). For this, we tested the action of sea water at 50% and sea water at 100 %. The results after a week of stress show that: the salinity has a highly significant effect. Moreover, whatever the studied parameter (turgescence, transpiration), the values are increased in the presence of the nutritive solution only. If the salt concentration exceeds 50% sea water, these parameters decrease and the salt is harmful. Results also showed the existence of a close relationship between these parameters. Thus, when the relative water content (RWC) decreases, there is a gradual decrease in water loss (RWL) transpiration, characterized by stomatal closure.

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