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Titre : Modélisation mathématique des problèmes électro-élastique de contact avec frottement Type de document : texte imprimé Auteurs : Ammar Derbazi, Auteur ; Mohamed Dalah, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2016 Importance : 58 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
MathématiquesTags : Antiplan Matériau électro-élastique Matériau électro-viscoélastique Loi de Contact Loi de Frottement Formulation Variationnelle Inéquation Variationnelle Solution Faible Electro-elastic Material Electro-viscoelastic Material Contact Law Friction Law Variational Formulation Variational Inequality Weak Solution ?? ????? ???? ???? ???? ???? ???? ???? ???? ????
????? ???????? ?????? ???????? ????????? ????????Index. décimale : 510 Mathématiques Résumé :
The purpose of this disertation is to study two types of antiplan contact problems with friction between a deformable body and a foundation. We assume along this disertation that the process is static for electroelastic materials and electro-viscoelastic materials. In first time, we try to construct a variational formulation of each problem and, we describe all the assumptions and equations for the each model of antiplan contact problem. In the second time, we give the boundary conditions with friction. Finally, the results we get on the existence and uniqueness of weak solutions of these problems will be confirmed and based by using the standard arguments of variational inequalities. The last part of this disertation contained an annex about some tools of functional analysis.Diplôme : Doctorat en sciences En ligne : ../theses/math/DER6911.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10250 Modélisation mathématique des problèmes électro-élastique de contact avec frottement [texte imprimé] / Ammar Derbazi, Auteur ; Mohamed Dalah, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2016 . - 58 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
MathématiquesTags : Antiplan Matériau électro-élastique Matériau électro-viscoélastique Loi de Contact Loi de Frottement Formulation Variationnelle Inéquation Variationnelle Solution Faible Electro-elastic Material Electro-viscoelastic Material Contact Law Friction Law Variational Formulation Variational Inequality Weak Solution ?? ????? ???? ???? ???? ???? ???? ???? ???? ????
????? ???????? ?????? ???????? ????????? ????????Index. décimale : 510 Mathématiques Résumé :
The purpose of this disertation is to study two types of antiplan contact problems with friction between a deformable body and a foundation. We assume along this disertation that the process is static for electroelastic materials and electro-viscoelastic materials. In first time, we try to construct a variational formulation of each problem and, we describe all the assumptions and equations for the each model of antiplan contact problem. In the second time, we give the boundary conditions with friction. Finally, the results we get on the existence and uniqueness of weak solutions of these problems will be confirmed and based by using the standard arguments of variational inequalities. The last part of this disertation contained an annex about some tools of functional analysis.Diplôme : Doctorat en sciences En ligne : ../theses/math/DER6911.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10250 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité DER/6911 DER/6911 Thèse Bibliothèque principale Thèses Disponible
Titre : الإكتئاب الأساسي لدى مريض السرطان كنشاط عقلي مميز Type de document : texte imprimé Auteurs : آمال فاسي ; جامعة منتوري, Editeur scientifique ; صالح معاليم, Directeur de thèse Année de publication : 2010 Importance : 328 ورقة Format : 30 سم Note générale : 02 نسخ في مخزن المكتبة المركزية 01 قرص مضغوط Langues : Arabe (ara) Catégories : Arabe
علم النفسTags : ???????? ??????? ???? ??????? ???? ???? ???? Index. décimale : 150 علم النفس En ligne : ../theses/psychologie/AFAS3171.pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=6387 الإكتئاب الأساسي لدى مريض السرطان كنشاط عقلي مميز [texte imprimé] / آمال فاسي ; جامعة منتوري, Editeur scientifique ; صالح معاليم, Directeur de thèse . - 2010 . - 328 ورقة ; 30 سم.
02 نسخ في مخزن المكتبة المركزية 01 قرص مضغوط
Langues : Arabe (ara)
Catégories : Arabe
علم النفسTags : ???????? ??????? ???? ??????? ???? ???? ???? Index. décimale : 150 علم النفس En ligne : ../theses/psychologie/AFAS3171.pdf Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=6387 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité فاس/3171 فاس/3171 Thèse Bibliothèque principale Thèses Disponible 
Titre : Conception des filtres optiques a base de cristaux photoniques pour application dans les routeurs optiques dans les reseaux de telecomunications optiques Type de document : texte imprimé Auteurs : Abdelali Boudissa, Auteur ; Malek Benslama, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2013 Importance : 87 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles Langues : Français (fre) Catégories : Français - Anglais
ElectroniqueTags : Cristaux photoniques couplage cavité-guide d’onde cavité résonante filtre optique Filtre Passe Bande Channel Drop Filter la méthode FDTD la méthode PWE Photonic crystal coupled cavity waveguides resonant cavity optical filter Band Pass Filter FDTD method PWE method ???????? ??????? ?????? ?????? ????? ???? ???? ???? ??? ?????? ?????PW ?????FDTD ???? ???? ???? Index. décimale : 621 Electronique Résumé : The implanting of optical routers in telecommunication optical network necessitates the modeling constituent’s amounts and approvals which encircle the considered router. For it, in this work, we investigate three types of filters with base 2D photonic crystals. The first, it is a narrow band optical filter, this system is constituted with two waves guides obtained by omitting one row of holes of the photonic crystal, coupled among them by a resonant cavity formed by a point of defect in the crystal. Near the resonant frequency (??a/2πc = 0.38), light from the input waveguide can couple into the cavity, and the cavity in turn can couple into the output waveguide, is that the peak transmission is precisely 100%.Then a Band Pass Filter is proposed, the out put transmission spectra of our filter covered three band. Band I covers the wavelength range from 1.331 to 1.355 μm has 86% of transmission power, Band II, from 1.390 to 1.427 μm, has 98% of the transmission power and Band III from 1.46 to 1.507 μm, and has 27% of the transmission power. The full width at half maximum bandwidth of these bands is 9.7, 13.1 and 16.4 nm,respectively. And finally a new constitution of “Channel Drop Filter " is simulated, it consists of two waveguides bends coupled among them by linear resonant cavity. The power dropped from the input waveguide bend into the drop channel at 1550 nm (the resonant frequency)is about 89%; the power transferred to the other channels is less than 5%. The Band of out put transmission spectra of the drop channel cover the wavelength range from 1505 to 1600 nm and the bandwidth is about 12.7 nm and the Q factor is 122.
The temporal and spectral behavior of the device is studied using two dimensional Finite Difference Time Domain Method (2D-FDTD) and Plane Wave Expansion (PWE) methods respectively.Diplôme : Doctorat en sciences En ligne : ../theses/electronique/BOU6325.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=6291 Conception des filtres optiques a base de cristaux photoniques pour application dans les routeurs optiques dans les reseaux de telecomunications optiques [texte imprimé] / Abdelali Boudissa, Auteur ; Malek Benslama, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2013 . - 87 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
ElectroniqueTags : Cristaux photoniques couplage cavité-guide d’onde cavité résonante filtre optique Filtre Passe Bande Channel Drop Filter la méthode FDTD la méthode PWE Photonic crystal coupled cavity waveguides resonant cavity optical filter Band Pass Filter FDTD method PWE method ???????? ??????? ?????? ?????? ????? ???? ???? ???? ??? ?????? ?????PW ?????FDTD ???? ???? ???? Index. décimale : 621 Electronique Résumé : The implanting of optical routers in telecommunication optical network necessitates the modeling constituent’s amounts and approvals which encircle the considered router. For it, in this work, we investigate three types of filters with base 2D photonic crystals. The first, it is a narrow band optical filter, this system is constituted with two waves guides obtained by omitting one row of holes of the photonic crystal, coupled among them by a resonant cavity formed by a point of defect in the crystal. Near the resonant frequency (??a/2πc = 0.38), light from the input waveguide can couple into the cavity, and the cavity in turn can couple into the output waveguide, is that the peak transmission is precisely 100%.Then a Band Pass Filter is proposed, the out put transmission spectra of our filter covered three band. Band I covers the wavelength range from 1.331 to 1.355 μm has 86% of transmission power, Band II, from 1.390 to 1.427 μm, has 98% of the transmission power and Band III from 1.46 to 1.507 μm, and has 27% of the transmission power. The full width at half maximum bandwidth of these bands is 9.7, 13.1 and 16.4 nm,respectively. And finally a new constitution of “Channel Drop Filter " is simulated, it consists of two waveguides bends coupled among them by linear resonant cavity. The power dropped from the input waveguide bend into the drop channel at 1550 nm (the resonant frequency)is about 89%; the power transferred to the other channels is less than 5%. The Band of out put transmission spectra of the drop channel cover the wavelength range from 1505 to 1600 nm and the bandwidth is about 12.7 nm and the Q factor is 122.
The temporal and spectral behavior of the device is studied using two dimensional Finite Difference Time Domain Method (2D-FDTD) and Plane Wave Expansion (PWE) methods respectively.Diplôme : Doctorat en sciences En ligne : ../theses/electronique/BOU6325.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=6291 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/6325 BOU/6325 Thèse Bibliothèque principale Thèses Disponible Documents numériques
texte intégraleAdobe Acrobat PDF
Titre : Conception et intégration d’un nouveau piezo-generateur et d’un système de stockage hybride batteries-supercondensateurs pour la génération et l’amélioration de la qualité d’énergie électrique Type de document : texte imprimé Auteurs : Yahia Bouzelata, Auteur ; Rachid Chenni, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 208 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Electro-techniqueTags : piézoélectricité générateur PZT circuits d’extraction stokage hypride batteries supercondensateur qualité d'énergie piezoelectric PZT generator extraction circuit hybrid storage Battery-supercapacitor energy quality ?????? ????? ???? ???? ???? ???? ????????? ??????? ?????? ????????? ???????? ??????? ????? ?????? Index. décimale : 622 Electro-Technique Résumé : A large number of studies have been published in the last decade on the possibility of harvesting vibratory energy using piezoelectricity as a conversion mechanism. Several aspects have been studied ranging from different electromechanical models through harvester forms maximizing performance to electrical circuits allowing an improvement of the harvesting energy. By spreading through the distribution electrical networks, the problem of harmonic pollution is becoming more and more worrying with the increasing use of electronic components and nonlinear loads, which leads to harmful consequences and therefore a malfunction of several devices sensitive to this kind of problems. Active power filtering is one of the most effective solutions to this problem. The contribution that brings this thesis, in the energy harvester and improvement field, consists to design a new optimal wind vibratory energy harvester using piezoelectric elements. The work of this thesis revolves around five objectives:
1. Design and experimental validation of a power generator based on piezoelectric
transduction and wind flow.
2. Development of an analytical model to predict the performances and explain the chosen
geometry of the piezoelectric wind energy harvester.
3. Development of an energy extraction circuit to maximize the harvested power by the
piezoelectric elements and adapt the generated voltages to a high level.
4. Design of a hybrid supercapacitors batteries system to store the harvested energy by the
wind piezoelectric generator and provide the power difference when an active power
imbalance occurs in the harvester system.
5. Development of an active filter compensation model based on piezoelectric harvester not only to mitigate the harmonic currents and voltages in the distribution electrical networks but also to compensate the reactive power on the source side.
In order to meet these objectives, at the beginning, we started with a reminder of the potential sources of harvested energy and the different conversion types including piezoelectric conversion and we have established a state of the art of the energy harvesting from piezoelectric elements. Then we presented theoretical notions of piezoelectricity followed by a detailed study of the piezoelectric phenomenon in order to use it in a vibratory energy harvesting structure and we have exposed a state of the art of piezoelectric generators with a macroscopic structure. Next, we have described bimetallic piezoelectric type structure as an example of application. After that, we presented the design, modeling, and the description of the proposed wind piezoelectric harvester, and we have established a literature review of the different generators models based on piezoelectric transduction and wind flow. In addition, the experimental validation of the piezoelectric generator model constituting our original contribution for that a large space was reserved for the presentation of the design process, fabrication and experimental assembly of the device after having developed a special analytical model. Besides, we showed how the extraction of the harvested energy can be conceived in order to maximize the power and adapt the generated voltages to the different electrical uses and how the storage of energy can be reached by a hybrid supercapacitors batteries system in a piezoelectric transduction mode. In the last step, we presented globally the problem of harmonics and the active filters as an effective solution. In addition, on the one hand, we applied a group of 8 identical PZT generators to the parallel active filter for current harmonics compensation, and on the other hand, we associated a group of 8 GEPZT to the series active filter to react against voltage harmonics and in the target to demonstrate its flexibility with piezoelectric systems.
Diplôme : Doctorat En ligne : ../theses/electrotec/BOU7382.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=11032 Conception et intégration d’un nouveau piezo-generateur et d’un système de stockage hybride batteries-supercondensateurs pour la génération et l’amélioration de la qualité d’énergie électrique [texte imprimé] / Yahia Bouzelata, Auteur ; Rachid Chenni, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2018 . - 208 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Electro-techniqueTags : piézoélectricité générateur PZT circuits d’extraction stokage hypride batteries supercondensateur qualité d'énergie piezoelectric PZT generator extraction circuit hybrid storage Battery-supercapacitor energy quality ?????? ????? ???? ???? ???? ???? ????????? ??????? ?????? ????????? ???????? ??????? ????? ?????? Index. décimale : 622 Electro-Technique Résumé : A large number of studies have been published in the last decade on the possibility of harvesting vibratory energy using piezoelectricity as a conversion mechanism. Several aspects have been studied ranging from different electromechanical models through harvester forms maximizing performance to electrical circuits allowing an improvement of the harvesting energy. By spreading through the distribution electrical networks, the problem of harmonic pollution is becoming more and more worrying with the increasing use of electronic components and nonlinear loads, which leads to harmful consequences and therefore a malfunction of several devices sensitive to this kind of problems. Active power filtering is one of the most effective solutions to this problem. The contribution that brings this thesis, in the energy harvester and improvement field, consists to design a new optimal wind vibratory energy harvester using piezoelectric elements. The work of this thesis revolves around five objectives:
1. Design and experimental validation of a power generator based on piezoelectric
transduction and wind flow.
2. Development of an analytical model to predict the performances and explain the chosen
geometry of the piezoelectric wind energy harvester.
3. Development of an energy extraction circuit to maximize the harvested power by the
piezoelectric elements and adapt the generated voltages to a high level.
4. Design of a hybrid supercapacitors batteries system to store the harvested energy by the
wind piezoelectric generator and provide the power difference when an active power
imbalance occurs in the harvester system.
5. Development of an active filter compensation model based on piezoelectric harvester not only to mitigate the harmonic currents and voltages in the distribution electrical networks but also to compensate the reactive power on the source side.
In order to meet these objectives, at the beginning, we started with a reminder of the potential sources of harvested energy and the different conversion types including piezoelectric conversion and we have established a state of the art of the energy harvesting from piezoelectric elements. Then we presented theoretical notions of piezoelectricity followed by a detailed study of the piezoelectric phenomenon in order to use it in a vibratory energy harvesting structure and we have exposed a state of the art of piezoelectric generators with a macroscopic structure. Next, we have described bimetallic piezoelectric type structure as an example of application. After that, we presented the design, modeling, and the description of the proposed wind piezoelectric harvester, and we have established a literature review of the different generators models based on piezoelectric transduction and wind flow. In addition, the experimental validation of the piezoelectric generator model constituting our original contribution for that a large space was reserved for the presentation of the design process, fabrication and experimental assembly of the device after having developed a special analytical model. Besides, we showed how the extraction of the harvested energy can be conceived in order to maximize the power and adapt the generated voltages to the different electrical uses and how the storage of energy can be reached by a hybrid supercapacitors batteries system in a piezoelectric transduction mode. In the last step, we presented globally the problem of harmonics and the active filters as an effective solution. In addition, on the one hand, we applied a group of 8 identical PZT generators to the parallel active filter for current harmonics compensation, and on the other hand, we associated a group of 8 GEPZT to the series active filter to react against voltage harmonics and in the target to demonstrate its flexibility with piezoelectric systems.
Diplôme : Doctorat En ligne : ../theses/electrotec/BOU7382.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=11032 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/7382 BOU/7382 Thèse Bibliothèque principale Thèses Disponible
Titre : L'évaluation des bornes du système hyper-chaotique de Lorenz-Haken. Type de document : texte imprimé Auteurs : Ahmed Diar, Auteur ; Mohamed Denche, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 59 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles. Langues : Français (fre) Catégories : Français - Anglais
MathématiquesTags : Système hyper-chaotique solution bornées système de Lorenz-Haken limite ultime système financier complexe Hyper-chaotic system Boundness solution Lorenz-Haken system Ultimate boundedness complex financial system ???? ??? ?????? ???? ???? ???? ??????-????? ???? ??????? ???? ???? ???? Index. décimale : 510 Mathématiques Résumé : The first part of this thesis is dedicated to the study a dynamic complex financial system, the boundedness of solutions of this system is concerned. We have obtained the ultimate bound for the system.Furthermore, its rich dynamics are investigated through numerical simulations. By using the Lyapunov exponents technic, it is found that the variation of system parameters can induce the parameter ranges of chaos are different. Finally, numerical simulations are given to verify the effectiveness and correctness of the obtained results.
The second part of this thesis is dedicated to the study of the hyper-chaotic Lorenz-Haken system is considered and the solution bounds of such a system are investigated. Based on the Time-domain approach. Finally a numerical example is provided to illustrate the main result.
Diplôme : Doctorat en sciences En ligne : ../theses/math/DIA7210.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10779 L'évaluation des bornes du système hyper-chaotique de Lorenz-Haken. [texte imprimé] / Ahmed Diar, Auteur ; Mohamed Denche, Directeur de thèse . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2018 . - 59 f. ; 30 cm.
2 copies imprimées disponibles.
Langues : Français (fre)
Catégories : Français - Anglais
MathématiquesTags : Système hyper-chaotique solution bornées système de Lorenz-Haken limite ultime système financier complexe Hyper-chaotic system Boundness solution Lorenz-Haken system Ultimate boundedness complex financial system ???? ??? ?????? ???? ???? ???? ??????-????? ???? ??????? ???? ???? ???? Index. décimale : 510 Mathématiques Résumé : The first part of this thesis is dedicated to the study a dynamic complex financial system, the boundedness of solutions of this system is concerned. We have obtained the ultimate bound for the system.Furthermore, its rich dynamics are investigated through numerical simulations. By using the Lyapunov exponents technic, it is found that the variation of system parameters can induce the parameter ranges of chaos are different. Finally, numerical simulations are given to verify the effectiveness and correctness of the obtained results.
The second part of this thesis is dedicated to the study of the hyper-chaotic Lorenz-Haken system is considered and the solution bounds of such a system are investigated. Based on the Time-domain approach. Finally a numerical example is provided to illustrate the main result.
Diplôme : Doctorat en sciences En ligne : ../theses/math/DIA7210.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10779 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité DIA/7210 DIA/7210 Thèse Bibliothèque principale Thèses Disponible
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