Publications scientifique de l'Université de Mascara

Publications scientifiques des enseignants de l'Université de Mascara

:

 

Chercher dans la Plateforme par :


2017
Climate change impact on rainfall spatiotemporal variability (Macta watershed case, Algeria)
La revue : Arabian Journal of Geosciences
Domaine : changement climatique, eau
Mots Clés : Climate change Water resources Spatial variability Drought Macta watershed Algeria 
Auteur : E. Abdelkader, H. Mohammed, B. Boumediene, B. Sid Ahmed
Issn : 1866-7511 Eissn : ******* vol : 10, Num : 22, pp : 1-14
Résume :
This work describes the climate change impact study on rainfall patterns in Macta watershed, located in the northwest of Algeria. The monthly rainfall data collection, verification and validation have built a database with 42 stations, each with 42 years of observations from 1970 to 2011. The study of annual total rainfall has identified a downward trend and quantifies the deficits that are within the observation time series. The division of the annual rainfall series into four periods allowed to highlighting the increase in inter-year temporal variability with the coefficient of variation increases from 17 to 27%. The study shows an annual rainfall deficit increment from 13 to 25%. The standard deviation values decrease significantly for the last two periods showing a spatial variability. Multivariate statistical study by the hierarchical clustering method resulted in the formation of station groups indicating the unification of monthly rainfall patterns.
Page web de l'auteur

2019
Improved IMC-Filter Design to IMC-PI Equivalence: Application to Quadrotor
La revue : IFAC-PapersOnLine
Domaine : Control
Mots Clés : Reference model IDA-PBC Autonomous UAV Internal energy Tracking control
Auteur : Yasser Bouzid, Houria Siguerdidjane, M Zareb, Yasmina Bestaoui.
Issn : 2405-8963 Eissn : 24058963 vol : 52, Num : 12, pp : 158-163
Résume :
This paper proposes a method to reach the equivalence between an IMC and a PI controller regardless of the model order. To this end, the key idea consists of using a specific IMC filter that exhibits a good level of robustness and further leads to get a structure of a PI controller whatever the order of the model is. The developed procedure constitutes the main contribution of this paper. To meet given set of specifications, the controller parameters are tuned through a straightforward analytic way using the dynamics of the tracking error. Furthermore, in order to evaluate the efficiency level of this procedure, an application to control an autonomous vehicle is described and the simulation results are shown to be satisfactory.
Page web de l'auteur

2014
Causal interactions between foreign direct investment (FDI),electricity consumption and economic growth: evidence from dynamic panel co-integration models
La revue : Journal of Social and Economic Statistics
Domaine : Economie
Mots Clés :
Auteur : Mostéfa BELMOKADDEM, Yassine Zakarya GHOUALI, Mohammed Seghir GUELLIL, Mohammed Abbes SAHRAOUI
Issn : 2212-5671 Eissn : vol : 3, Num : 2, pp : 1-30
Page web de l'auteur

2020
Kählerian Structure on the Product of Two Trans-Sasakian Manifolds
La revue : INTERNATIONAL ELECTRONIC JOURNAL OF GEOMETRY
Domaine : Geometry
Mots Clés : Trans-Sasakian manifolds, Kählerian manifolds; product manifolds
Auteur : Habib Bouzir, Gherici Beldjilali
Issn : Eissn : vol : 13, Num : 2, pp :
Résume :
It’s shown that for some changes of metrics and structural tensors, the product of two transSasakian manifolds is a Kählerian manifold. This gives new positive answer and more generally to Blair-Oubin˜a’s open question. (See [7] and [17]). Concrete examples are given.
Page web de l'auteur

-0001
Ab-initio study of structural, electronic and magnetic properties of CdTe doped transition metal Co
La revue :
Domaine :
Mots Clés :
Auteur : A. Zitouni, S. Bentata, W. Benstaali and B.Abbar
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

2017
Numerical Study of Natural Convection in a Vertical Cylindrical Partially Annular
La revue : Mechanics and Mechanical Engineering
Domaine : heat and mass transfer
Mots Clés : natural convection, Finite Volume Method, partially annular, Nusselt number
Auteur : Mohamed A. MEDEBBER, Noureddine RETIEL
Issn : 1428-1511 Eissn : 2354-0192 vol : 22, Num : 1, pp : 71–86
Résume :
A study of free convection in a vertical cylinder partially annulus is conducted numerically. Uniform temperature is imposed cross a vertical wall, while the top and bottom walls are adiabatic. The governing equations are solved numerically by using a finite volume method. The coupling between the continuity and momentum equations is effected using the SIMPLER algorithm. Solutions have been obtained for Prandtl numbers equal to 7.0, Rayleigh numbers of 103 to 106 and height ratios of 0 to 1. The influence of physical and geometrical parameters on the streamlines, isotherms, average Nusselt has been numerically investigated.
Page web de l'auteur

-0001
2019
La revue : مجلة دراسات إنسانية واجتماعية
Domaine : فلسفة
Mots Clés : الدين، الفلسفة، التطور، المنهج، فلسفة الدين
Auteur :
Issn : 2253-0592 Eissn : vol : 11, Num : 08/01, pp : 155-166
Résume :
نحاول في موضوعنا طرح تحليل فلسفي لتطور العلاقة بين مجالين مهمين من حياة البشر، ألا وهما الدين والفلسفة، حيث نطمح إلى فهم التغير الحاصل في النظر إلى مفهوم وموضوع وغاية الدين عبر تاريخ الفكر الفلسفي، لفهم طبيعة الوثبة الحاصلة من فلسفات دينية إلى فلسفة في الدين وإشكال مقالنا ينطلق من وجود نقلة نوعية عرفها الفكر الفلسفي حول الدين من فلسفات دينية مجالها التسليم أو الاعتقاد ثم التعقل إلى فلسفة في الدين تتأسس على الانتقاد و التعقل دون حدود وقيود مواكبة مستجدات الواقع والعلم
Page web de l'auteur

2019
Internet addiction and its relation with some variables for secondary school Students
La revue : Journal Of College Of Basic Education For Educational And Human Sciences
Domaine : Psychologie
Mots Clés : Internet Addiction. Students. Secondary school
Auteur : Zine El Abidine Elmagroud
Issn : 2304-3717 Eissn : 2312-8003 vol : , Num : 43, pp : 499-508
Résume :
The present study aim at identifying the level of Internet addiction among Secondary School. And see if there are differences in the level of Internet addiction to students depending on the gender variable. residence and educational level.The sample consisted of (109) Students.The researcher uses Internet addiction scale. The results of this study show There is a moderate level of Internet addiction among secondary school students.It also shows There were no differences between males and females in internet addiction and Specialization.
Page web de l'auteur

-0001
irst principle study of spintronic properties for double perovskites Ba2XMoO6 with X =V, Cr and Mn
La revue :
Domaine :
Mots Clés :
Auteur : A. Souidi, S. Bentata, W. Benstaali, B. Bouadjemi, A. Abbad, T. Lantri
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

2018
Combining and comparing different machine learning algorithms to improve dissolved gas analysis interpretation
La revue : IET Generation, Transmission & Distribution
Domaine : Electrotechnique
Mots Clés : DGA, Power transformer, Diagnosis, Machine learning, Ensemble technique
Auteur : Mohammed El Amine Senoussaoui , Mostefa Brahami, Issouf Fofana
Issn : 1751-8687 Eissn : 1751-8695 vol : 12, Num : 15, pp : 3673-3679
Résume :
Since the discovery of dissolved gas analysis (DGA), it is considered as a leading technique for the diagnosis of liquid insulated power equipment. However, accurate analysis results can only be achieved if the measured gases closely reflect the actual equipment condition to enable an appropriate interpretation of these gases. In general, conventional techniques such as the ratio method, key gases, and Duval triangle combined or not with artificial intelligence techniques such as machine-learning algorithms are used for DGA interpretation. Here, four well-known machine-learning algorithms are compared in terms of DGA fault classification – Bayes network, multilayer perceptron, k-nearest neighbour, and J48 decision tree. Moreover, the effect of applying ensemble methods such as boosting through the Adaboost algorithm and bootstrap aggregation (bagging) is analysed, and the performances of these algorithms are evaluated. The data for developing classification models was transformed into three forms, other than the raw data. The obtained results clearly presented the efficiency and stability of some algorithms such as the J48 tree and Bayes networks for DGA fault classification, in particular, when the data is appropriately pre-processed. Moreover, the performance of these algorithms was found to consistently improve by integrating the concepts of multiple models or ensemble methods.
Page web de l'auteur

2016
The Granger Causality Effect between Cardiorespiratory Hemodynamic Signals
La revue : Springer International Publishing Switzerland 2016, Forging Connections between Computational Mathematics and Computational Geometry, Springer Proceedings in Mathematics & Statistics 124, DOI 10.5176/2251-1911_CMCGS14.50_23
Domaine : Mathematics, Statistics and Biomedical
Mots Clés : Direction of information, Cardiorespiratory hemodynamic signals, Granger causality, Multivariate study, (MGH/MF) waveform database
Auteur : Samir Ghouali, Mohammed Feham, Yassine Zakarya Ghouali
Issn : 2194-1009 Eissn : vol : , Num : , pp : 275-300
Résume :
Granger causality (GC) is one of the most popular measures to reveal causality influence of time series based on the estimated linear regression model and has been widely applied in economics and neuroscience due to its reliability, clarity, and robustness. Granger causality has recently received increasing attention to study causal interactions of neurophysiological data; in this chapter we have developed a model of causality between the respiratory, hemodynamic, and cardiac signals, more specifically, a study based on the Granger causality between three ECG leads, blood pressure, central venous pressure, pulmonary arterial pressure, respiratory impedance, and airway CO2. We selected 187 patients of 250 for our study, taken from Montreal General Hospital/MF (Massachusetts General Hospital/Marquette Foundation) databases. These signals are ideal for understanding causality and coupling (unidirectional or bidirectional). In this approach we aim to analyze and understand the interactions between the signals mentioned above, and identify the significance of this interaction. The originality of this chapter is the number of variables selected for the study. Unlike the majority of studies that are conducted only with two variables, our study is multidimensional. The main advantage of a multidimensional and multivariable model is to solve a myriad of problems which is not the case in the two-dimensional studies.
Page web de l'auteur

2016
Structures on the Product of Two Almost Hermitian Almost Contact Manifolds
La revue : INTERNATIONAL ELECTRONIC JOURNAL OF GEOMETRY
Domaine : Mathématiques
Mots Clés : Almost Hermitian almost contact structure, almost contact metric manifolds with 3-structures, hyperkählerian structure.
Auteur : BELDJILALI gherici, BELKHELFA mohamed.
Issn : 1307-5624 Eissn : vol : 9, Num : 2, pp : 80-86
Résume :
The purpose of this paper is to define some classes of almost contact metric 3-structures manifolds and almost quaternionic metric with an almost Hermitian almost contact metric structure. Next, we construct an almost quaternionic Hermitian structure on the product of two almost Hermitian almost contact metric structures. This gives a new positive answer to a question raised by T. Tshikuna-Matamba.
Page web de l'auteur

2020
أثر تغيرات بيئة الأعمال على نشاط الشركات العائلية . - دراسة تحليلية لمقياس الأعمال السنوي للشركات العائلية الأوربية 2017 –
La revue : Beam Journal of economic studies
Domaine : Management international
Mots Clés : : مناخ الأعمال ، الشركات العائلية الأوربية ، النجاعة ، البارومتر السنوي 2017 ، الإبداع والتطوير .
Auteur : Assia Hebri.
Issn : 2661-779X Eissn : vol : 04, Num : 01, pp : 274-285.
Résume :
تهدف هذه الدراسة إلى تحليل الأثر الكبير الذي تحدثه التفاعلات العامة والخاصة للشركات العائلية مهما كان حجمها ونشاطها مع مناخ الأعمال السائد في موقعها الجغرافي و تفاعلها مع بيئتها الداخلية والخارجية ومسؤوليتها اتجاه الأطراف أصحاب المصلحة - أكد الاستبيان السنوي لعام 2017 من إعداد الفدرالية الأوربية للشركات العائلية EBF ومجموعة مستشاري شركة مرافقة الأعمال العائلية KPMG ، بعد أن حقق نسبة أكثر من 1100 إجابة من مالكي الشركات العائلية في كل مكان في أوروبا لسنة 2017، على قوة روابط الشركات العائلية الأوربية على الرغم من التحديات التي تواجهها يوميا وإعادة استثمار أرباحهم والبحث عن الجديد و الفرص التطويرية التي تسمح لهم بخلق ظروف ملائمة للنمو المستدام لشركاتهم .
Page web de l'auteur

-0001
Effect of the Alumium fraction “x” in subminiband structures of Fibonacci AlxGa1−xAs/GaAs superlattices
La revue : Journal of applied sciences
Domaine :
Mots Clés :
Auteur : Z. Aziz, S. Bentata and R. Djelti
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

2017
A Novel Conducting Nanocomposite Obtained by p-Anisidine and Aniline With Titanium(IV) Oxide Nanoparticles: Synthesis, Characterization, and Electrochemical Properties
La revue : Polymer Composites
Domaine : Materials
Mots Clés : Hybrid materials Nanoparticle Zinc oxide 4-Chloroaniline Electrical conductivity
Auteur : F. Chouli
Issn : 1548-0569 Eissn : vol : 38 , Num : , pp : 254-260
Résume :
Nanocomposites were successfully synthesized by the oxidative polymerization of p‐anisidine and/or aniline monomers (at initial “p‐anisidine:aniline” mole ratios of “100 : 0,” 50 : 50,” and “0 : 100”) with titanium(IV) oxide nanoparticles, in the presence of hydrochloric acid as a dopant with ammonium persulfate as an oxidant. The morphological, structural, conductivity, and electrochemical properties of the synthesized nanocomposites were studied using Transmission Electron Microscopy, X‐ray diffraction, Fourier transform infrared spectroscopy, and UV–vis spectroscopies. The presence of polymer on TiO2 nanoparticles in samples nanocomposites was confirmed by the Transmission Electron Microscopy coupled with Energy Dispersive X‐ray Spectroscopy. The thermal stability of samples nanocomposites were evaluated using the Thermogravimetric Analysis. Electrical conductivity of nanocomposites obtained is in the range of 0.08 − 0.91 S cm−1. The electrochemical behavior of the polymers extracted from the nanocomposites has been analyzed by cyclic voltammetry. Good electrochemical response has been observed for polymer films; the observed redox processes indicate that the polymerization on TiO2 nanoparticles produces electroactive polymers. These composite microspheres can potentially be used in commercial applications as fillers for antistatic and anticorrosion coatings. POLYM. COMPOS., 38:E254–E260, 2017. © 2015 Society of Plastics Engineers
Page web de l'auteur

2019
وكالات الاستخدام الخاصة -دراسة للنظام القانوني للهيئات الخاصة للتنصيب في الجزائر
La revue :
Domaine : القانون
Mots Clés : سوق الشغل- مرفق التنصيب- الإتفاقية الدولية رقم 181 - عروض العمل- طلبات العمل-ضبط سوق العمل- الوكالة الوطنية للتشغيل- الهيئات الخاصة للتنصيب.
Auteur :
Issn : Eissn : 2600-6952 vol : 33, Num : 04, pp : 121-153
Résume :
لم يمانع المشرع الجزائري من فتح الوساطة في التشغيل لأشخاص القانون الخاص طبيعيين ومعنويين ،لكنه حصر مشاركتهم في تسجيل العمال،إنتقائهم،وتقديمهم للهيئات المستخدمة قصد تنصيبهم ومن دون الإخلال بالإعتراف لهم بالبحث عن عروض العمل وجمعها وتوزيعها وهو ما يعني أنّه حصر مهمتهم في الوساطة في التنصيب، ما جعله يسمي الأشخاص التي تتولى هذه المهمة بالهيئات الخاصة للتنصيب بدل وكالات الإستخدام الخاصة وفق ما حددته منظمة العمل الدولية. تتناول الورقة البحتية المقدّمة تحديدا لماهية وكالات الإستخدام الخاصة والشكل الذي اختار المشرع الجزائري أن تظهر به أو ما يعرف بهيئات التنصيب الخاصة كاستجابة لتحرير الوساطة في التشغيل،من خلال إعادة النظر في آليات ضبط سوق العمل وتنظيمه ،لتنتقل الوساطة في التشغيل من الإحتكار الكلي للوكالة الوطنية للتشغيل إلى المشاركة المقيّدة لوكالات الإستخدام الخاصة. ABSTRACT The Algerian legislator did not object to the opening of employment mediation to private law persons; however, he limited their participation in the registration, selection and submission of workers to the bodies used for their inauguration without prejudice to their recognition of the search, collection and distribution of work. , which means that inventory their mission on mediation at the inauguration, who undertake this task to the private bodies for installation, instead of private employment agencies as defined by the International Labor Organization. This paper deals with the specific nature of the private employment agencies and the form in which the Algerian legislator chose to be represented by the so-called private instigators, with the aim of liberalizing employment mediation, by revising the mechanisms of regulating and regulating the labor market, in order to restrict participation of private use agencies
Page web de l'auteur

2017
A Leaky Wave Antenna Design Based on Half-mode Substrate Integrated Waveguide Technology for X Band Applications
La revue : International Journal of Electrical and Computer Engineering (IJECE)
Domaine : telecommunications
Mots Clés :
Auteur : S. Doucha, M. Abri, H. Abri Badaoui, B. Fellah
Issn : 2088-8708 Eissn : 10.11591/ijece.v7i6.pp3467-3474 vol : 07, Num : 06, pp : 3467~3474
Résume :
A new type of leaky-wave antenna (LWA) using half-mode substrate integrated waveguide (HMSIW) as the base structure is proposed in this paper. The structure consists of an array of slot, antenna designed to operate in X band applications from 8 to 12 GHz. HMSIW preserves nearly all the advantages of SIW whereas its size is nearly reduced by half. The antenna radiates one main beam that can be steered from the backward to the forward direction by changing frequency. Copyright © 2017 Institute of Advanced Engineering and Science. All rights reserved.
Page web de l'auteur

2019
Simulation and Practical Realization of A 24-Pair Electronic Continuity Test Circuit for MSAN ZTE
La revue : Journal of Telecommunication, Electronic and Computer Engineering
Domaine : Telecommunications
Mots Clés : Electrical Continuity; MDF; MSAN; Dispatcher; ZTE
Auteur : Samir Ghouali, Mohammed Moulay, Mohammed Feham
Issn : 2180-1843 Eissn : 2289-8131 vol : 11, Num : 04, pp : 19-23
Résume :
The continuity test of a telephone line is a technique used very often by every Telecom site engineer. Continuity refers to communication that does not face any interruption. Very often, the continuity measurement takes place during troubleshooting to ensure that the lines are intact. The work presented in this paper is based on the principle of MDF continuity rule lines for MSAN site. It presents the practical realization of a continuity tester circuit to verify several telephone lines simultaneously, specifically 24 pairs (24 subscribers) at the same time. Our solution suggested for making troubleshooting in one of the outages/ malfunctions more flexible and fluid in terms of intervention and time for repair. A case study involving 18 sites in two different regions in Algeria, Constantine (without circuit) and El Oued (with circuit) was conducted and the results showed there was a gain ratio estimated at about 338/1361 (Min).
Page web de l'auteur

2017
les oeuvress social des travailleures entre le concept des services sociaux et les domaines de la protection sociale
La revue : Arrachidia
Domaine : Droit
Mots Clés : oeuvres social .service social
Auteur : B.kamel.Y.souad.A.rachid
Issn : 2170-0907 Eissn : vol : , Num : 9, pp : 311-324
Résume :
les oeuvres sociales des travailleures sont etroitement liees a la politique sociale de letat ayant une humanitaire vu le premier concept duquel elles sont generees a savoire le service social. cependant limiter l objet des oeuvres sociales dans le cadre des relations de travaile comme l une des branches de la protection sociale lui confere le caractere du droit conscacre par la loi que tout emploiyeure doit garantir dans les limites des possiblites qui lui sont offertes.
Page web de l'auteur

-0001
Theoretical study of correlated disorder in superlattices under bias voltage
La revue :
Domaine :
Mots Clés :
Auteur : R.Djelti, S. Bentata, Z. Aziz and A.. Besbes
Issn : Eissn : vol : , Vol. 23, Num : No. 25 5067 , pp :
Page web de l'auteur

-0001
Erbium/Ytterbium-Doped Waveguide Amplifier (EYDWA) for extended reach of Wavelength Division Multiplexing based free space optics system (WDM/FSO)
La revue : Journal of Optical Communications
Domaine :
Mots Clés :
Auteur : Attaouia. Bentahar, Malika. Kandouci, Samir. Ghouali
Issn : Eissn : vol : , Num : , pp :
Résume :
This work is focused to carry out the investigation of wavelength division multiplexing (WDM) approach on free space optical (FSO) transmission systems using Erbium Ytterbium Doped Waveguide Amplifier (EYDWA) integrated as post-or pre-amplifier for extending the reach to 30 Km for the cost-effective implementation of FSO system considering weather conditions. Furthermore, the performance of proposed FSO-wavelength division multiplexing (WDM) system is also evaluated on the effect of varying the FSO range and results are reported in terms of Q factor, BER, and eye diagrams. It has been found that, under clear rain the post-amplification was performed and was able to reach transmission distance over 27 Km, whereas, the FSO distance has been limited at 19.5 Km by using pre-amplification.
Page web de l'auteur

2016
التحليل الاحصائي و نمذجة سوق العمل في الجزائر
La revue : Revue Des Politiques Economiques En Algérie « POLDEVA»,
Domaine : Economie
Mots Clés :
Auteur : خذير أسامة، بلمقدم مصطفى، قليل محمد صغير
Issn : 1112-9786 Eissn : vol : 5, Num : , pp : 206-228
Page web de l'auteur

-0001
Characteristics and Electrical Parameters of Silicon Nanowires (SiNWs) Solar Nanocells
La revue : JOURNAL OF NANO- AND ELECTRONIC PHYSICS
Domaine : Material
Mots Clés :
Auteur : M. Hebali, M. Bennaoum, H.A. Azzeddine, B. Ibari, M. Benzohra, D. Chalabi
Issn : 2077-6772 Eissn : vol : 12, Num : 06, pp : 1-4
Page web de l'auteur

2016
PANI-derived polymer/Al2O3 nanocomposites: synthesis, characterization, and electrochemical studies
La revue : Colloid and Polymer Science
Domaine : Materials
Mots Clés : Polyaniline 2-Chloroaniline Aluminum oxide Nanocomposite Electrochemical properties
Auteur : S. Benykhlef
Issn : 0303-402X Eissn : vol : 294, Num : , pp : 1877-1885
Résume :
This paper presents the physicochemical, conductive, and electrochemical properties of different polyaniline (PANI)-derived polymer/Al2O3 nanocomposites synthesized by chemical oxidation polymerization method carried out in two stages: first, activation of the surface of the Al2O3 nanoparticles by hydrochloric acid and second, polymerization of 2-chloroaniline (2ClANI), aniline (ANI), and the copolymer (2ClANI-ANI) in the presence of Al2O3 by using ammonium persulfate as oxidant in aqueous hydrochloric acid. XRD and TEM results reveal the growth of the polymers on Al2O3 nanoparticles and the formation of PANI-derived polymer/Al2O3 nanocomposites. FTIR and UV-Vis show a systematic shifting of the characteristic bands of the polymers with the presence of Al2O3 nanoparticles. Moreover, these nanoparticles enhance the thermal stability of the polymers, as found by thermogravimetric analysis (TGA). Although the incorporation of Al2O3 nanoparticles reduces the electric conductivity of the polymers, the resulting nanocomposites still keep high conductivities, ranging between 0.3 × 10−2 and 9.2 × 10−2 S cm−1. As a result, the polymer/Al2O3 nanocomposites exhibit a good voltammetric response. All these synergetic features of the nanocomposites are assigned to the effective interaction of the polymers and Al2O3 particles at nanoscale.
Page web de l'auteur

2016
Study of a new electrostatic precipitator with asymmetrical wire-to-cylinder configuration for cement particles collection
La revue : Journal of Electrostatics
Domaine : Elsevier
Mots Clés : Electrostatic precipitator Corona discharge High resistivity particles Asymmetrical geometry Collection efficiency
Auteur : F Kherbouche, Y Benmimoun, A Tilmatine, A Zouaghi, N Zouzou
Issn : 0304-3886 Eissn : vol : 83, Num : , pp : 7-15
Résume :
In this paper, a new electrostatic precipitator (ESP) with asymmetrical wire-to-cylinder configuration is investigated experimentally and numerically. The main objective is to evaluate the collection efficiency of high resistivity particles.The electrical measurements show that the corona discharge behavior is similar to that obtained in symmetrical wire-to-cylinder configuration. Results show that the collection efficiency can reach 95% in the case of negative corona discharge. In order to understand the particle trajectories inside the ESP, the experimental results are compared with numerical simulation by using a coupled model. Numerical results indicate that particles can be collected on the collecting electrode backside.
Page web de l'auteur

-0001
Electronic States Nature of Trimer Height Barrier Disorder Superlattices
La revue : Journal of Applied Sciences
Domaine :
Mots Clés :
Auteur : R. Djelti, S. Bentata and Z. Aziz
Issn : Eissn : vol : , Num : , pp :
Page web de l'auteur

2014
Backstepping control with integral action of PMSM integrated according to the MRAS observer
La revue : IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
Domaine : Electrotechnic
Mots Clés : Backstepping control, Lyapunov theorem, Integral action, Permanent Magnet Synchronous Motor (PMSM), Model Reference Adaptive System (MRAS), observer
Auteur : A. Larbaoui, B. Belabbes, A. Meroufel, A. Tahour, and D. Bouguenna*
Issn : 2320-3331 Eissn : vol : 9, Num : 4, pp : 59-68
Résume :
The work developed in this article, has aims to control design law is based on Backstepping method to ensure the servo-control of the permanent magnet synchronous motors (PMSM). The slow convergence of adaptation can result, in some cases; irreversible instabilization loop, especially in the presence of nonlinearity and/or couplings. Hence, the Backstepping method coupled with introduction of integral actions is an alternative choice. Moreover, the Backstepping theory is a recursive design methodology that makes use of the Lyapunov stability theory. Strong properties of overall and asymptotic stability can be achieved. The second part of this work is a direct application of the control proposed to associate an observer, is the Model Reference Adaptive System (MRAS) to observe the position and the rotor speed of the MRAS. Furthermore, the simulation under the Matlab/Simulink software allows highlighting the performance of the control strategy adopted
Page web de l'auteur

-0001
Experimental and Numerical Fracture Modeling Using XFEM of Aluminum Plates
La revue : International Journal of Engineering Research in Africa
Domaine :
Mots Clés :
Auteur : Ali Taghezout, Bendouba Mostefa ,Djebli Abdelkader ,Aid Abdelkarim et Habib Khellafi
Issn : Eissn : vol : 46, Num : , pp : 45-52
Résume :
In this paper a numerical modeling was carried out to study the problem of plane elasticity in a medium cracked by the method of the extended finite elements (XFEM) in a thin cracked plate made of aluminum using the software Abaqus 6.13.This method improved the capability of the classical finite element method especially the crack propagation problems. Furthermore, the extended finite elements method has been used to simulate tensile and fracture behavior of the study materials. Based on variation in size and shape of crack, the results obtained will be compared with those obtained experimentally, this comparison shows a good agreement.
Page web de l'auteur

2018
An epidemic of plagiarism strikes our Universities The current threat and the delayed treatment: A literature review analysis
La revue : JIL MAGAZINE
Domaine : SCHOOL PSYCHOLOGY
Mots Clés : Plagiarism, online plagiarism, offline plagiarism, self plagiarism, cheating in exams
Auteur : BENMESMOUDI AALI
Issn : 2311-5181 Eissn : vol : , Num : 48, pp : 139-147
Résume :
In this paper we clarify the phenomenon of plagiarism which threatens the credibility of both the examination and the learning process
Page web de l'auteur

2016
Modélisation Mathématique de la Production Pétrolière des Pays Membres de L’OPAEP
La revue : Revue Des Politiques Economiques En Algérie « POLDEVA»,
Domaine : Economie
Mots Clés :
Auteur : Mohammed Seghir GUELLIL , Mostéfa BELMOKADDEM
Issn : 1112-9786 Eissn : vol : 4, Num : , pp : 1-15
Page web de l'auteur

1 2 3 4 5 6 7 8 9 10