Papers by Abdessamad MALAOUI
Several approaches are currently explored to build devices exploiting nano-size effects in energy... more Several approaches are currently explored to build devices exploiting nano-size effects in energy and life-sciences. Self-assembling emerges as a master bottom-up technique to enable the applications of nanomaterials into the real world. Among these applications, image sensing and processing requires capabilities that are beyond the technology of current image sensors, such as automated color-based quality inspection systems operating under varying levels of illumination (2). I will describe the recent outcomes of our network of collaborative research aimed at exploiting the benefits of organic (4), graphene (6),(8), detecting, photocatalysis (1) 'Frontiers in
International Journal of Innovation and Applied Studies, Apr 2, 2016
A new approach is presented in this work, to extract electrical parameters of a photovoltaic cell... more A new approach is presented in this work, to extract electrical parameters of a photovoltaic cell, using the double exponential model. The equivalent circuit parameters of this model are the photocurrent (I ph), ideality factor (ƞ), diffusion current (I od), recombination current (I or), series resistance (R s) and the shunt resistance (R sh). Several research studies have been performed to extract these parameters. The majority of these developed methods are limited on several levels. In this work the proposed technique is based on the equalization of the electric model of photovoltaic cells, and a polynomial model equivalent. The comparison of these two models at I=0, allows representing the electrical parameters with the polynomial model coefficients. This method is tested on a monocrystalline solar panel and obtained results show the advantage of this technique in level of speed, convergence and precision.
Journal of computer sciences and applications, Nov 6, 2015
In this paper, we present an automatic recognition system of electronic components. The recogniti... more In this paper, we present an automatic recognition system of electronic components. The recognition system is based on digital image of Nyquist curves drawn by transfer functions of their equivalent impedances. In the first step, we construct a database of Nyquist diagram of 17 known circuits. In the second step, we apply shape analysis algorithms of curves such as: Fourier Descriptors (FD), Freeman Coding (FC) and Hu Moments (HM). In classification part, we use the Neural Networks (NN). The simulation results demonstrates that the proposed method give a good results.
Modeling and Electrical Parameters Extracting of Polymer Solar Cells
The Polymer Solar Cells (PSCs) have gained increasing interest in the past few years as a possibl... more The Polymer Solar Cells (PSCs) have gained increasing interest in the past few years as a possible alternative to silicon cells and could provide many advantages as a flexibility and low cost... The functioning of PSCs depends heavily on intrinsic electrical parameters through the knowledge of the influence of each parameter on the I-V characteristic of the cell. In this work, we determine the PSC’s electrical parameters of the poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). This identification is based on the experimental current- voltage characteristic using a single diode model. The Least Square Method (LSM) combined with Levenberg Marquardt’s algorithm are proposed to identify these electrical parameters. The obtained results indicate the importance of the proposed method and a high accuracy of the estimated parameters compared with the previous conducting studies.
Retracted: Development and testing of a remote laboratory for practical work based on embedded electronics
Journal of Fundamental and Applied Sciences, Mar 5, 2018
The aim of this work is to implement a remote laboratory that provides real-time access for stude... more The aim of this work is to implement a remote laboratory that provides real-time access for student to control on-line practical works. Based on an embedded system PcDuino and other electronic, the student can manipulate a remote Practical Work and carry out measurements via the Internet. The client can interact with the remote Practical Work through a web page, developed using web technologies, which allows the user to control the components of the Practical Work. This paper also gives a detailed description of this evolutionary architecture by presenting its software and hardware parts. The system implemented allows supervising the practical manipulation remotely by sensors and Webcam.
特異値分解(SVD)に基づく顔認識のための新技術【Powered by NICT】
IEEE Conference Proceedings, 2016
Moroccan Journal of Condensed Matter, 2010
The poly(o-toluidine) (POT) were synthesized by chemically oxidization. Their thin films were fab... more The poly(o-toluidine) (POT) were synthesized by chemically oxidization. Their thin films were fabricated by spincoating on indium-tin-oxide (ITO) coated glass substrate. A Schottky diode with configuration ITO/POT/Al devices is fabricated. The Current-Voltage characteristics of the devices were non-linear indicating rectification behavior. The observed current-voltage characteristics can be satisfactorily fitted using the modified Shockley equation. The diode parameters were calculated from I-V characteristics and discussed. On the other hand, the Capacitance-Frequency and Capacitance-Voltage characteristics are presented and discussed.
International Journal of Innovation and Applied Studies, Sep 2, 2014
This work is a contribution in the technical and instrumentation sides related to the field of ph... more This work is a contribution in the technical and instrumentation sides related to the field of photovoltaic renewable energy. It presents the details of a simple and low cost electronic realization, capable of increasing the production of photovoltaic electricity. This system is based on an electronic device developed with a microcontroller and other components available on the market. In effect, this electronic card can mechanically control the angular orientations of photovoltaic panels, with actuators connected to a power electronics developed to automatically tracking of the sun position. This system is compared with other fixed photovoltaic system, which was experimentally positioned with optimal physical and geometrical parameters. The results of tests and comparison show the energy benefits and economic and technical interest of this realization.
Mathematical modelling of engineering problems, Mar 30, 2019
In recent years, there is an increased requirement including transfers rapidity of information, d... more In recent years, there is an increased requirement including transfers rapidity of information, due to the widespread use of multimedia applications on wireless communication system. The MIMO technology offers a promising solution for increasing spectral efficiency and transmitting data across a multi-antenna transmission and reception network. The goal of this study is to improve the data processing time, which poses a big problem of digital communication. In this article, a solution is proposed to improve this problem. The adopted approach shows that the use of the CORDIC algorithm to calculate the cosine and sine of the DFT / IDFT is very efficient and that the use of the fixed point gives a remarkable speed while maintaining a better accuracy. In addition, the use of a powerful fixed-point processor dedicated to signal processing could also have given better results than other results obtained in the literature. The results obtained conclude that the use of the CORDIC algorithm on a fixed point is faster compared to receiver without the CORDIC algorithm.
This work is a contribution in the technical and instrumentation sides related to the field of ph... more This work is a contribution in the technical and instrumentation sides related to the field of photovoltaic renewable energy. It presents the details of a simple and low cost electronic realization, capable of increasing the production of photovoltaic electricity. This system is based on an electronic device developed with a microcontroller and other components available on the market. In effect, this electronic card can mechanically control the angular orientations of photovoltaic panels, with actuators connected to a power electronics developed to automatically tracking of the sun position. This system is compared with other fixed photovoltaic system, which was experimentally positioned with optimal physical and geometrical parameters. The results of tests and comparison show the energy benefits and economic and technical interest of this realization.
Automatisation en température par microcontrôleur d'un banc de mesure ultrasonore : applications au contrôle qualité en agroalimentaire
Ce travail porte sur la mise au point de nouveaux outils (ou l'amelioration d'outils exis... more Ce travail porte sur la mise au point de nouveaux outils (ou l'amelioration d'outils existants), electronique, thermique et informatique pour l'analyse des ondes ultrasonores qui se propagent dans des milieux liquides. Il rassemble les contributions suivantes : - developpement d'un nouveau modele mathematique precis decrivant la vitesse ultrasonore dans l'eau pure en fonction de la temperature, pour etalonner les montages experimentaux et estimer des donnees non mesurees. - utilisation des derniers developpements innovants de l'electronique integree, programmable, pour la mise au point d'un montage de mesure ultrasonore informatise, regule en temperature par microcontroleur. - developpement d'une plate-forme informatique a l'aide de la programmation G pour visualiser et traiter les resultats sur ordinateur, et des programmes en langage machine pour generer des signaux electriques qui commandent l'electronique de puissance. - realisation du banc des mesures tests pour etalonner le montage et autres pour caracteriser, par la technique ultrasonore, quelques liquides agroalimentaires, en particulier, l'eau de la mediterranee et l'huile d'argan
Amélioration des performances de la commande vectorielle du moteur synchrone à aimants permanents alimenté par un onduleur de tension à MLI
REVUE DE L’ENTREPRENEURIAT ET DE L’INNOVATION, Jul 21, 2018
L’objectif du present travail, est d’ameliorer les performances de la commande vectorielle a flux... more L’objectif du present travail, est d’ameliorer les performances de la commande vectorielle a flux oriente, pour le controle en vitesse du moteur synchrone a aimants permanents alimente par un onduleur de tension. En presentant en premier lieu, une etude comparative entre les correcteurs PI et IP classiques utilises pour la regulation du couple et de la vitesse, dont la synthese de ces derniers repose sur le modele de la MSAP dans le repere (d q) de Park. Ensuite, nous etudions l’influence de la technique de controle de l’onduleur sur le taux de fluctuation du couple et de la vitesse en regime permanent, en evaluant le THD% des courants statoriques, dont nous abordant les deux techniques couramment utilisees dans l’industrie, a savoir, la MLI sinus-triangle (SPWM) et la MLI vectorielle (SVPWM ou SVM). Les resultats de simulation sous l’environnement Matlab/Simulink, montrent une amelioration remarquable des performances avec le correcteur IP. Ainsi qu’une reduction des ondulations du couple et de la vitesse avec la MLI vectorielle
Low cost pedagogic device for practical works using embedded system
This paper discusses design and implementation of an operational architecture of practical work r... more This paper discusses design and implementation of an operational architecture of practical work remote controlled using embedded systems. This architecture relates to university courses in electronics, such as new approaches of low-cost remote labs. Students can access these labs from a local network in the university at any time and frequently compared to conventional teaching, without being fixed by the conventional schedule. This strategy can solve the problems related to the big number of registrants in Moroccan Faculties, particularly in open access institutions. The hardware and software parts of this prototype are presented and analyzed because they can be generalized in other disciplines. The hardware part is formed with a Arduino microcontroller, which controls an electronic manipulation of a single-phase rectifier, considered as example of a remote controlled manipulation. The evaluation of this educational system is performed by students in the discipline of electronics and industrial systems, which shows the benefits of this realization.
Precise electric measurements with temperature using 10-bit embedded system: Application on photovoltaic junctions
In this paper, an electronic temperature control system is presented. This contribution aims to p... more In this paper, an electronic temperature control system is presented. This contribution aims to provide a not expensive prototype, fast and accurate, which can be used by research laboratories to control the temperature for electrical measurements. This device is based on the implementation of the PID algorithm in an embedded system at 10-bit Analog/Digital Converter (ADC). The electronic schematics and results of this controller are presented and compared with those with an old 8-bits ADC controller and with a standard laboratory regulator. Initial tests are performed on the temperature control of a photovoltaic junction to measure its intrinsic electrical parameters. The obtained results show the range and levels of the advantages of this device.
International Journal of Innovation and Applied Studies, Jun 30, 2016
In this paper, we study the application of a non-destructive technique to analyze the argan oil. ... more In this paper, we study the application of a non-destructive technique to analyze the argan oil. This is to measure the velocity and attenuation of acoustic waves that propagate in the oil, depending on the temperature and the concentration of other mixtures oils. Information is derived from these measurements find a correlation between measurable parameters and other physical parameters that characterize the liquid. Analytical and empirical models are extracted and studied through these measures. Significant results are presented and discussed to show the interest of the application of this technique on the quality control of this specific oil.
Fabrication and characterization of Schottky diodes and thin films based on poly(o-toluidine) deposited by spincoating technique
Synthetic Metals, Jul 1, 2010
Poly(o-toluidine) (POT) thin films were fabricated by spin coating on bare glass and indium–tin–o... more Poly(o-toluidine) (POT) thin films were fabricated by spin coating on bare glass and indium–tin–oxide (ITO)-coated glass substrates, from a solution of poly(o-toluidine) in chloroform. The optical transmittance of the as-deposited and doped films was measured in the 250–1200nm wavelength range. These measurements showed that the optical band gaps of the undoped and doped polymer films are on the order of
Accurate temperature control of a ultrasonic cell using a microcontroller
In this paper we present the description of the realization of an electronic system and ultrasoni... more In this paper we present the description of the realization of an electronic system and ultrasonic cell. The electronic system allows the control of cell temperature. This device is a compact system, less expensive and constructed around a microcontroller ST6225. The ultrasonic cell was designed and realized to measure with high precision the time of flight in the agroalimentary liquids
DOAJ (DOAJ: Directory of Open Access Journals), Jun 1, 2010
-Dans ce papier, deux nouvelles méthodes sont développées afin d'extraire les paramètres électriq... more -Dans ce papier, deux nouvelles méthodes sont développées afin d'extraire les paramètres électriques I 0 , R s , R sh et η, du modèle à une exponentielle d'une jonction. La première est basée sur la comparaison et l'égalisation du modèle analytique d'une diode, et un modèle polynomial équivalent. Les dérivées des deux modèles, à l'origine des tensions, permettent de générer un système d'équations qui exprime les paramètres électriques en fonction des coefficients du modèle polynomial. La deuxième méthode développée, est articulée sur l'algorithme de Levenberg Marquardt, en utilisant une approche de la détermination et la pondération de la matrice Hessienne, à partir du modèle exponentiel. Les deux méthodes sont testées, à l'aide des programmes développés avec Matlab, sur deux bases de mesures I-V, réalisées par une diode de Schottky. Des comparaisons, de ces deux approches proposées, ont été effectuées la méthode numérique de Newton-Raphson et une autre graphique. Les résultats obtenus sont discutés sur le plan de la rapidité, la précision et l'ordre des erreurs statistiques définis. Ils montrent les limites de l'utilisation de ces deux approches et l'intérêt qu'elles présentent.
A new method is developed in this work, to extract electrical parameters using an analytical mode... more A new method is developed in this work, to extract electrical parameters using an analytical model for junction based on polymers Al/ PPEEB wish is prepared in two steps. First, the thin layer of polymer PPEEB (derivative polyperlene diimide) is deposited by spin coating, then the aluminum contacts is deposited by vacuum thermal evaporation. Electrical characterization technique is performed by experime ntal equipment carried out by our research team [1]. The Schottky diode (SD) is one o f the most commonly used semiconductor devices, considering their low turn-on voltage and high response frequency. The Schottky diode is used in a variety of circuits (sensors, de tectors, radio frequency applications, rectifiers ...). The developed method is based on the comparison of the simple exponential model of a sample, with an equivalent polynomial model. The eq uality of these two models, at origin current (I=0), gives an analytical solution of the el ctrical parameters based on polynomial ...
International Journal of Innovation and Applied Studies, 2016
In this paper, we study the application of a non-destructive technique to analyze the argan oil. ... more In this paper, we study the application of a non-destructive technique to analyze the argan oil. This is to measure the velocity and attenuation of acoustic waves that propagate in the oil, depending on the temperature and the concentration of other mixtures oils. Information is derived from these measurements find a correlation between measurable parameters and other physical parameters that characterize the liquid. Analytical and empirical models are extracted and studied through these measures. Significant results are presented and discussed to show the interest of the application of this technique on the quality control of this specific oil.
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Papers by Abdessamad MALAOUI