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Oum el Bouaghi, Algeria

Leila C.,University Larbi Ben Mhidi | Maamar K.,University of Batna | Salim C.,University of Mentouri Constantine
International Arab Journal of Information Technology | Year: 2012

Combining classifiers is an approach that has been shown to be useful on numerous occasions when striving for further improvement over the performance of individual classifiers. In this paper we present a Multiple Classifier System (MCS) for off-line Arabic handwriting recognition. The MCS combines three neuronal recognition systems based on Fuzzy ART network used for the first time in Arabic OCR, multi layer perceptron and radial basic functions. We use various feature sets based on Tchebichef, Hu and Zernike moments. For deriving the final decision, different combining schemes are applied. The best combination ensemble has a recognition rate of 90,10%, which is significantly higher than the 84,31% achieved by the best individual classifier. To demonstrate the high performance of the classification system, the results are compared with three research using IFN/ENIT database. Source


Benchouia N.E.,Skikda University | Derghal A.,University Larbi Ben Mhidi | Mahmah B.,Renewable Energy Development Center Algeria | Madi B.,Skikda University | And 2 more authors.
International Journal of Hydrogen Energy | Year: 2015

Among the various fuel cell technologies available for use in vehicular systems, the Proton Exchange Membrane Fuel Cell (PEMFC) has drawn the most attention due to its simplicity, viability, higher power density and operation at lower temperatures. Due to this features, PEMFC is considered to be the most suitable technology for vehicular systems, industry and other applications.As fuel cells are likely to be used in many future applications, great efforts have recently been made for their comprehension and design. This paper focuses on a 1.2W PEM fuel cell unit and develops the models of stack voltage and stack power. While PEM fuel cell is a nonlinear process, it is very suitable to use fuzzy control to solve the control issue of the fuel cell. The stack output power can be controlled to a given value by using a variable universe fuzzy controller by controlling input gases flow rate.In this paper a FLC controller have been designed to control the voltage of at the presence of fluctuations. The results of implementation of this designed FLC controller on a dynamic electrochemical model of a small size 1.2W, PEM fuel cell have been simulated by MATLAB SIMUlINK and compared with a traditional PID controller. Simulation results show that good control effects can be achieved by using the adaptive fuzzy control system. © 2015 Hydrogen Energy Publications, LLC. Source


Missaoui B.E.,University of Ouargla | Ouahrani M.R.,University of Ouargla | Kouadri Y.,University of Ouargla | Gherraf N.,University Larbi Ben Mhidi
Asian Journal of Chemistry | Year: 2015

The purpose of this work is the development of a synthetic method that allows access to some heterocyclic compounds containing pyrimidine and pyrazole nuclei. The dehydroacetic acid has been extensively studied as a starting material for the synthesis of natural products that exhibit valuable pharmacological properties. In the first part, we have shown that the pyrimidines can be obtained by reacting dehydroacetic acid with nitrogen binucleophiles reagents. In the second part, we presented the reactivity of the previously synthesized derivatives towards hydrazine to yield derivatives involving pyrimidine and pyrazole motifs. All the synthesized products were subjected to IR, 1H NMR and mass spectra studies. © 2015, Chemical Publishing Co. All rights reserved. Source


Missaoui B.E.,University of Ouargla | Ouahrani M.R.,University of Ouargla | Kouadri Y.,University of Ouargla | Gherraf N.,University Larbi Ben Mhidi
Asian Journal of Chemistry | Year: 2015

The purpose of this work is the development of a synthetic pathway that allows access to heterocyclic compounds containing the 1,5-benzodiazepines. The dehydroacetic acid has been widely studied as a starting material for the synthesis of natural products that exhibit interesting pharmacological properties. In the present work, we describe an easy and cost effective access way to new products 1,5-benzodiazepines involving a pyranic residue. All synthesized products were subjected to IR, 1H NMR and mass spectra studies. Source


Kouadri Y.,University of Ouargla | Ouahrani M.R.,University of Ouargla | Missaoui B.E.,University of Ouargla | Gherraf N.,University Larbi Ben Mhidi
Asian Journal of Chemistry | Year: 2015

The β-keto ester undergoes condensation reactions with aliphatic and aromatic amines in ethanol to give high-yielding β-enamino ester. The method is simple, cost-effective and environmentally benign. Structural characterization of the synthesized compounds was carried out by spectroscopic methods (1H NMR, 13C NMR and DEPT). Source

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