03.Seminars

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1st International Seminar on Valorization of Bioresources in Environment & Health 10-11 May 2023
(University Of Eloued جامعة الوادي, 2023-05-10) Faculty of natural and life science
1st National Seminar: Biotechnology, Health & Agro-Environment. NSBHAE 2022
(University of Eloued جامعة الوادي, 2022-03-14) Department of biology
The application of innovative technology in the health, agronomy and ecology sector requires describing the heritage, the constraints and the challenges linked to its application. There are intersections of different types between these sectors; from the point of view of the use of bioresources in the food and medical industries which may present an environmental pollutant. Indeed; The current observation of our environment and the elements that constitute it (air, water, earth ...), invite us to reflect on its future and especially on the natural capital that we will bequeath to future generations. Besides, various living beings contain in addition primary or secondary metabolism substances (Bioactive Substances), the presence of these substances makes these organisms of therapeutic, agricultural or industrial value. Meetings aimed at describing the application of biotechnology in the fields already mentioned are necessary. Thus, we are forced to develop bio-products with a low or neglected polluting effect.
2-Orthogonal Polynomials and Darboux Transforms
(University of Eloued جامعة الوادي, 2019-04-23) Faghmous, Chadia; Bouras, Mohamed Cherif; Ali Khelil, Karima
In this work we present a new interpretation of Darboux transforms in the context of 2-orthogonal polynomials and nd condi- tions in order for any Darboux transform to yield a new set of 2- orthog- onal polynomials. We also introduce the LU and UL factorizations of the monic Jacobi matrix associated with a quasi-de nite linear functional de ned on the linear space of polynomials with real coe¢ cients.
3D Finite element simulation of metal waste compaction process
(University of Eloued جامعة الوادي, 2018-12-10) Bokhors, S.; Benhizia, A.; Outtas, T.
This paper presents a numerical study of the dynamic compaction of random cylindrical metal waste assembly. The analysis of the process is based on a new method to place the waste randomly in the chamber, using the 3D collision detection function in SolidWorks that can highlight interferences and collisions. The material is considered to be elasto-plastic. A threedimensional study was carried out using the finite element method in an explicit dynamic analysis. The study offer useful information on the packing density variation within the loading applied. The results provide a better understanding of the dynamic compaction process.
3rd International Conference in Operator Theory, PDE and Applications
(University of Eloued جامعة الوادي, 2019-03-12) Mathematics Department
A Demonstratif Overview of Photovoltaic Systems Faults
(University of Eloued جامعة الوادي, 2019-02-24) Bouraiou Ahmed; Ammar Neçaibia; Rachid Dabou; Abderrezzaq Ziane; Nordine Sahouane; Abdeldjalil Slimani
Abstract—The faults occurring in any industrial systems affects its performance. Moreover, the knowing of the photovoltaic systems faults is a key task for insuring the PV system reliability and good operation, this paper reviews the different defects of the components of photovoltaic (PV) systems (stand-alone, grid- connected). Focusing on the photovoltaic modules defects presentation which are the sensitive component in this chain.
A dynamic contact problem between elasto-viscoplastic piezoelectric bodies with normal compliance adhesion and damage
(University Of Eloued جامعة الوادي, 2020-02-23) Maiza Laid; Tedjani Hadj ammar
We consider a dynamic frictionless contact problem between two elasto-viscoplastic piezo- electric bodies with damage. The evolution of the damage is described by an inclusion of parabolic type. The contact is modelled with normal compliance condition. The adhesion of the contact surfaces is considered and is modelled with a surface variable, the bonding eld whose evolution is described by a rst order di erential equation: .......................... We derive variational formulation for the model and prove an existence and uniqueness result of the weak solution. The proof is based on argu- ments of nonlinear evolution equations with monotone operators, a classical existence and uniqueness result on parabolic inequalities, di erential equations and xed-point arguments.
A Hybrid Intelligent Control of A Doubly Fed Asynchronous Generator in Wind Turbine
(University Of Eloued جامعة الوادي, 2020-02-23) Guediri Abdelhafid; Guediri Abdelkarim; Lammouchi zakaria
This paper presents an A Hybrid Intelligent control of a doubly fed asynchronous machine (DFAM) is proposed. First, a mathematical model of DFAM written in an appropriate d q reference f rame is established to investigate simulations results. and to maintain the constant voltage of the DC link. Performance is also tested in different situations. In order to control the rot ary currents from DFAM, the torque tracking control law is manufact ured using PI controllers; the stator side power factor is controlled at unity level. Specifically neuro fuzzy systems are created to overcome the disadvantages of neural networks and The effectiveness of the proposed control strategy is evaluated under di fferent operating conditions such as reference speed and torque step changes at nominal parameters and in the presence of a difference in the parameter. Simulation results show that the mysterious logical console is stronger than the traditional IP console in the face of differing parameters and uncertainty, and is less sensitive to torque disturbance in external load with a rapid dynamic response; Its simulated displays are then compared to the performance of th e classic PI controller
A Hybrid Optimization Approach to identification problem in thermodynamic models
(Universty of El-oued جامعة الوادي, 2019-02-24) Merzougui.A1,2; Hasseine.A1,2; Laiadi.D1,2
The interaction parameter estimation problem in thermodynamic models is an important requirement and a common task in many areas of chemical engineering because these models form the basis for synthesis, design, optimization and control of process. For bad starting values the use gradient based result in local optimal solutions. To overcome this drawback, a global optimization approach, Simulated Annealing and genetic algorithm, has been coupled with a Nelder-Mead simplex method. To improve the accuracy of the interaction parameter estimate. The experimental ternary LLE data for extraction of toluene from n-heptane with aniline were considered in the NRTL and UNIQUAC activity coefficient model. In conclusion, the different obtained results of the prediction of liquid–liquid equilibrium are compared. These results were obtained to justify that the process of optimization recommended is very practical to estimate the interaction parameters of this ternary system.
A Hydraulic Comparison between Center Pivot Irrigation Traditional and Modern Type ANABIB
(University of Eloued, 2019-02-24) Hadji Mohammed Salah; Guerrah Ayoub; Mansouri Khaled
The objective of this article is to realize a hydraulic comparison between the traditional and modern irrigation pivot system (Type ANABIB). This comparison is based on evolution of hydraulic parameters like pressure, flow and length between the sprinklers (nozzles) to obtain a homogeneous distribution of water over the entire irrigated area. Center Pivot irrigation has an important agricultural component in Algeria, especially in the South such (El Oued, Ouargla, Biskra, Meniaa, Adrar, etc.). However, this irrigation technique is often used by farmers, who don’t have the scientific expertise to develop and improve the performance of their equipment, taking into account the weather conditions of desert areas, as well as the sizing of the pumping system. Farmers in Souf deal with the traditional pivot system and don’t accept the modern type ANABIB with suitable normalization factor because its high cost. Therefore, the necessity to improve hydraulic performance of the traditional system until it has a high normalization factor and good uniformity of irrigation. However in well-designed devices we can get a good hydraulic efficiency the order of 85%. The results of the work observed for the hydraulic parameters of traditional system commonly used by farmers give us 59,58 and 70,76% of Cuh that values gives us the possibility to improve its uniformity of irrigation by the predominant effect of the sprinkler distance to get an acceptable values of normalization factor (over than 85%), on the other hand ANABIB system gives 95,98 and 97,28% of Cuh that considers as a perfect values . It is intended that this article be served as a starting point from which improved uniformity may be developed in the future
A new classification of clock Synchronization in Wireless Sensor Networks
(University of Eloued, 2019-02-24) Habib Aissaoua; Makhlouf Aliouat; Abdelkader Laouid; Farid Lalem
Since the birth of computer networks and distributed systems, the clock synchronization issue has been considered as a major challenge. In fact, the importance to have clocks synchronized resides in the fact that a wide range of communication protocols and applications necessitate a common notion of time for the overall network nodes to operate perfectly. MAC protocols and node sleep scheduling are protocol examples based on synchronized clocks. The design of synchronization protocols is challenged by the uncertainty arising from message latency and clock drifting, and also by resource constrained nodes. In this work, we first exhibit the basic concepts of the clock synchronization issue, and we provide a thorough classification based on the features that have to be considered when designing synchronization protocols in such networks
A New robust Level Set image segmentation method based Signed Pressure Force function : Application to Medical Images
(Universty of Eloued جامعة الوادي, 2019-02-24) Messaouda LARBI; Abdelghani ROUINI; Zoubeida MESSALI; Samira LARBI
Segmentation is an extremely active field of research since it is an important step in the treatment and the interpretation of the medical images. It represents one of the most difficult step for relevant parameters extraction from images. In this paper, we study A New robust Level Set image segmentation method is developed by formulating Signed Pressure Force Function (SPF). The advantages of this method are Firstly, the Function of Signed Pressure can efficiently stop the contours at weak or blurred edges, Second, exterior and interior boundaries can be detected no matter where the initial contour starts. We compare this method with Chan Vese (C-V) model and Geodesic Active Contours (GAC). The performance of each method can be evaluated either visually, or from similarity measurements between a reference and the results of the segmentation. We have applied each method for different medical images. Through simulated results, we have demonstrated that the best results are achieved by the proposed method.
A New Rotor Broken Bar Fault Diagnosis by Using CNN Based Current Signal of An Induction Motor
(University of Eloued, 2023-12-11) ADAIKA Hamza; TIR Zoheir; SAHRAOUI Mohamed
Abstract— In industrial contexts, the efficient operation of induction motors is paramount, necessitating robust condition monitoring and fault diagnosis techniques to mitigate costly disruptions. In this study, we introduce an innovative approach for intelligent fault detection of broken rotor bars in induction motors, harnessing the "Signal2Image" method and convolutional neural networks (CNN). Leveraging a comprehensive current signal dataset from Aline Elly Treml Western Parana State University, encompassing various levels of broken rotor bar (BRB) faults and diverse loading conditions, our method automatically extracts essential features from input data. The "Signal2Image" process transforms time-domain current signals into 2D grayscale pixel images, facilitating CNN-based image classification to identify fault-related patterns. Through meticulous CNN parameter tuning, we achieve an impressive fault classification accuracy of 88% across all fault cases while optimizing computational efficiency. A significant contribution of this work is the substantial reduction in computational time for fault classification, surpassing existing approaches. This research enhances fault detection accuracy and streamlines the process, contributing to the field of predictive maintenance for induction motors.
A Rule-based Energy Management of Solar-PV and Battery supplying Dc Load S.
(university Of Eloued جامعة الوادي, 2020-02-23) S. Boualem; M.Benmeddour; M.Kermadi; H. Serhoud; M.Maamir; H.Cherif
The paper presents an energy management controller (EMC) using the Rules based strategy (RBS). The system consists of a photovoltaic array with 4.6kw as the main source and an energy storage system composed of load acid battery that supplies a sta ndalone DC load. Also The power of every source (PV module, battery) is modulated via a proper side static converters. And The different components of the system are simulated under Matlab/Simulink environment. T hus t he obtained results prove the feasibili ty of the proposed approach, where the system switches smoothly between the operating modes.
A Simple Efficient Finite Element for the Sandwich and Laminated Composites Plates Analysis
(Universty of El-oued جامعة الوادي, 2019-02-24) Khmissi BELKAID; Khmissi BELKAID; Gaagaia Djamel Edinne.; Aouaichia Hamza; Fergani Nadir; Boutasseta Nadir
In this work, the theory of Reddy’s third order shear deformation Kinematic and from the equivalent approach single layer are used in order to suggest a simple efficient finite element for the analysis of isotropic and composite laminated and sandwich plates. The proposed element is an isoparametric 2D quadrilateral C0 four-node with seven degrees of freedom (7DOF) per node, three translation, two rotations and two higher order rotational degrees. The selective numerical integration technique is presented for the formulation in order to improve the performance of model and to surmount the locking problem in thin plate case. Furthermore, the performance and reliability of the proposed model are investigated by comparing the author’s results with those obtained using the three dimensional elasticity theory, analytical solutions and other advanced finite element models.
A simple equation for estimating hourly water consumption in CSP plants
(University of Eloued جامعة الوادي, 2019-02) T.E. Boukelia; A. Ghellab; A. Laouafi; A. Bouroui
Abstract— Unlike conventional thermal power plants which are generally erected in the coastal regions near water bodies, seas and oceans, where water resource availability is not a critical factor, concentrating solar power (CSP) plants are usually installed in high sunny zones which generally characterized by semi-arid and arid climates, where water resources are hard to find and/or to employ. On the other side, the hourly simulations of water consumption in CSP plants are very complex and require many calculations, data analysis and time consuming. Therefore, the aim of this paper is to develop a simple equation to estimate the hourly water consumption of a solar tower plant based on its generated power, and the existing power plant Gemasolar has been chosen to establish the methodology. The obtained results of the statistical analysis show that the cubic model based on the generated power, can be used as a simple and general model to predict hourly water consumption in a large scale solar tower power plant.
A solution based on prediction for cloud resources allocation
(University Of Eloued جامعة الوادي, 2020-02-23) Djelid raouf
The phenomenon of the clouds makes it possible to have a dynamic resource management. The effectiveness of this management becomes an important issue with the increasing size of the number of resources and the number of users. Because of a non-negligible initialization cost, a precise prediction needs must be made. In this article, we offer an approach to the prediction of the Identification based on the use of resources in the history of a platform. We represent the algorithm of resources allocation witch uses this method to assist the system to use resource allocation decisions as well as results of utilization expertise of cloud resources historical load.
A solution based on prediction for cloud resources allocation
(University Of Eloued جامعة الوادي, 2020-02-23) Djelid Raouf
The phenomenon of the clouds makes it possible to have a dynamic resource management. The effectiveness of this management becomes an important issue with the increasing size of the number of resources and the number of users. Because of a non-negligible initialization cost, a precise prediction needs must be made. In this article, we offer an approach to the prediction of the Identification based on the use of resources in the history of a platform. We represent the algorithm of resources allocation witch uses this method to assist the system to use resource allocation decisions as well as results of utilization expertise of cloud resources historical load.
A State of the Art : Heat Transfer within a MOSFET System
(university Of Eloued جامعة الوادي, 2020-02-23) Oussama Zobiri; Abdelmalek Atia
The FET (field effect transistor) is the backbone of today's semiconductor electronics. The Metal Oxide Semiconductor Field Effect Transistor (MOSFET) is the most popular type of isolated gate FET used in a variety of electronic circuits. In recent years, the MOSFET miniaturization has gained considerable interest. As the size of the device decreases ( nano-scale) , the heat generated influences the efficiency of the device. There have been many thermal studies to improve the operation of the device. This paper gives an idea on the MOSFET and heat transfer phenomena within it.
A Survey on modulation approaches for Z-source
(Universty of El-oued جامعة الوادي, 2019-02-24) Ali TETA; Mohamed Mounir REZAOUI; Abdellah KOUZOU; Aicha DJALAB
This paper discusses and compares several control strategies for the Z-source inverter, contrary to the traditional inverters the impedance network in the ZSI provides one extra switching state called shoot-through state which ensures the unique buck-boost voltage feature. This study aims to analyze and compare four control methods namely, SBC simple boost control, MBC maximum boost control, MCBC maximum constant boost control and maximum constant boost control with third harmonic injection.

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