Résultat de la recherche
5 résultat(s) recherche sur le tag 'comparaison' 
Visionner les documents numériques
Affiner la recherche Générer le flux rss de la recherche
Partager le résultat de cette recherche Interroger des sources externesEtude numérique de l'aérodynamique dans les cyclones, comparaison de performance de différentes formes de cyclones / Nadjib Ghiti
Titre : Etude numérique de l'aérodynamique dans les cyclones, comparaison de performance de différentes formes de cyclones Type de document : texte imprimé Auteurs : Nadjib Ghiti ; Université Mentouri, Editeur scientifique ; K. Talbi, Directeur de thèse Année de publication : 2006 Importance : 79 f. Note générale : 01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD Langues : Français (fre) Tags : pérformance Formes Cyclones Comparaison Index. décimale : 620 Génie Mécanique Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=704 Etude numérique de l'aérodynamique dans les cyclones, comparaison de performance de différentes formes de cyclones [texte imprimé] / Nadjib Ghiti ; Université Mentouri, Editeur scientifique ; K. Talbi, Directeur de thèse . - 2006 . - 79 f.
01 Disponible à la salle de recherche 02 Disponibles au magazin de la B.U.C. 01 CD
Langues : Français (fre)
Tags : pérformance Formes Cyclones Comparaison Index. décimale : 620 Génie Mécanique Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=704 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
Titre : Evaluation de la prémédication anesthésique et de la réanimation Type de document : texte imprimé Auteurs : Amir Mansour, Auteur ; El Hacène Bererhi, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 91 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles Langues : Français (fre) Tags : ketamine xylazine acepromazine anesthesia hypothermia association arythmias intramuscular adrenaline Kétamine Acépromazine Xylazine Midazolam comparaison effet secondaire syncope reanimation ??????? ??????????? ???????? ????????? ?????? Index. décimale : 636 Sciences Vétérinaires Résumé : General anesthesia intramuscular became a possible anesthetic technique in current veterinary practice Our study is the comparison of biological parameters, the depth of anesthesia in different period of time (15 minutes, 30 minutes and 1 hour after induction) Reviewed and complications from anesthesia between multiple protocols at fifty female Wistar albino rats of this study also compared the efficacy of two molecules of resuscitation by intramuscular injection at a dosage The association ketamine acepromazine reveals a better state of deep general anesthesia apartir the 30th minute compared to other association the evaluation of muscle relaxation reveals a good quality of this one for three ketamine combination acepromazine, ketamine and xylazine ketamine midazolam reports a ketamine alone.
The association ketamine xylazine appears hypothermic (32 ° C lower on average) bradicadisante (236bats/mn average) and arrhythmogenic 2 of 10 rats have presented ESV) reports by other protocols moments réveil.Par against the association acepromazine ketamine causes a delay of the alarm (203mn average after induction) and a delay in diuresis (227 minutes on average after induction) compared to other protocols, our study indicates that the combination ketamine midazolam has a depression the ventilatory function (respiratory rate 86 breaths / min) over another protocol.
resuscitation adrenaline intramuscularly Revel a insufisant results (2 from 5 rats survived) with secondary effects on cardiac function (arrhythmias).Diplôme : Magistère En ligne : ../theses/veterinaire/MAN6468.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9498 Evaluation de la prémédication anesthésique et de la réanimation [texte imprimé] / Amir Mansour, Auteur ; El Hacène Bererhi, Directeur de thèse . - constantine (Route ain el bey, Algérie) : Université Constantine 1, 2014 . - 91 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : ketamine xylazine acepromazine anesthesia hypothermia association arythmias intramuscular adrenaline Kétamine Acépromazine Xylazine Midazolam comparaison effet secondaire syncope reanimation ??????? ??????????? ???????? ????????? ?????? Index. décimale : 636 Sciences Vétérinaires Résumé : General anesthesia intramuscular became a possible anesthetic technique in current veterinary practice Our study is the comparison of biological parameters, the depth of anesthesia in different period of time (15 minutes, 30 minutes and 1 hour after induction) Reviewed and complications from anesthesia between multiple protocols at fifty female Wistar albino rats of this study also compared the efficacy of two molecules of resuscitation by intramuscular injection at a dosage The association ketamine acepromazine reveals a better state of deep general anesthesia apartir the 30th minute compared to other association the evaluation of muscle relaxation reveals a good quality of this one for three ketamine combination acepromazine, ketamine and xylazine ketamine midazolam reports a ketamine alone.
The association ketamine xylazine appears hypothermic (32 ° C lower on average) bradicadisante (236bats/mn average) and arrhythmogenic 2 of 10 rats have presented ESV) reports by other protocols moments réveil.Par against the association acepromazine ketamine causes a delay of the alarm (203mn average after induction) and a delay in diuresis (227 minutes on average after induction) compared to other protocols, our study indicates that the combination ketamine midazolam has a depression the ventilatory function (respiratory rate 86 breaths / min) over another protocol.
resuscitation adrenaline intramuscularly Revel a insufisant results (2 from 5 rats survived) with secondary effects on cardiac function (arrhythmias).Diplôme : Magistère En ligne : ../theses/veterinaire/MAN6468.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9498 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
Titre : Techniques de commande avancées de la machine asynchrone : étude comparative et applications Type de document : texte imprimé Auteurs : Salah Eddine Rezgui, Auteur ; Hocine Benalla, Directeur de thèse Editeur : Constantine : Université Mentouri Constantine Année de publication : 2015 Importance : 206 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Tags : Commande par mode glissant avancée comparaison réseau de neurones estimation en-ligne
des paramètres commande sans capteurs dSPACE liding mode advanced control comparison artificial neural network on-line parameters
estimation sensorless control ???? ??????????? ????????? ?????? ??? ????? ?????? ?????? ??????? ?????????? ????? ?????????? ??? ??????? ???? ???? ???????Index. décimale : 622 Electro-Technique Résumé : The aim of this work was carried on the experimental comparison of the performance of field oriented vector control and DTC control, and to develop control and observation algorithms with conjoint on-line estimation of the induction motor (IM) parameters, taking into consideration the constraints imposed by the practical realization. We took a special interest to the experimental test-bed as it is an essential step for validating each new control law design.
A theoretical study is devoted to the basic concepts of variable structure systems with sliding mode, and after describing the conventional method, we proceeded to the synthesis of control law that is based on exponential reaching phase (ERL) to achieve more robustness of the system even at transients and to improve its dynamic response.
At the end, a new sensorless control by MRAS with an on-line conjoint estimation of the IM parameters using artificial neural networks is developed. To do so, we proceed with a theoretical study of the MRAS technique evoking its different methods. Then we continue with the process of estimating the IM parameters espacially the stator resistance and the inverse of the rotor time constant using the concept of Popov’s hyperstability. After describing the principles of neural networks and their application to our case in the estimation of the parameters we go further to the practice implementation and interpretation of results.
Diplôme : Doctorat en sciences En ligne : ../theses/electrotec/REZ6753.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9862 Techniques de commande avancées de la machine asynchrone : étude comparative et applications [texte imprimé] / Salah Eddine Rezgui, Auteur ; Hocine Benalla, Directeur de thèse . - Constantine : Université Mentouri Constantine, 2015 . - 206 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : Commande par mode glissant avancée comparaison réseau de neurones estimation en-ligne
des paramètres commande sans capteurs dSPACE liding mode advanced control comparison artificial neural network on-line parameters
estimation sensorless control ???? ??????????? ????????? ?????? ??? ????? ?????? ?????? ??????? ?????????? ????? ?????????? ??? ??????? ???? ???? ???????Index. décimale : 622 Electro-Technique Résumé : The aim of this work was carried on the experimental comparison of the performance of field oriented vector control and DTC control, and to develop control and observation algorithms with conjoint on-line estimation of the induction motor (IM) parameters, taking into consideration the constraints imposed by the practical realization. We took a special interest to the experimental test-bed as it is an essential step for validating each new control law design.
A theoretical study is devoted to the basic concepts of variable structure systems with sliding mode, and after describing the conventional method, we proceeded to the synthesis of control law that is based on exponential reaching phase (ERL) to achieve more robustness of the system even at transients and to improve its dynamic response.
At the end, a new sensorless control by MRAS with an on-line conjoint estimation of the IM parameters using artificial neural networks is developed. To do so, we proceed with a theoretical study of the MRAS technique evoking its different methods. Then we continue with the process of estimating the IM parameters espacially the stator resistance and the inverse of the rotor time constant using the concept of Popov’s hyperstability. After describing the principles of neural networks and their application to our case in the estimation of the parameters we go further to the practice implementation and interpretation of results.
Diplôme : Doctorat en sciences En ligne : ../theses/electrotec/REZ6753.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9862 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire 
Titre : Etude et modélisation de deux distillateurs solaires symétrique et asymétrique à effet de serre Type de document : texte imprimé Auteurs : Abderachid Trad, Auteur ; Abdenacer Kaabi, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 242 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Tags : Distillateur solaire orientation comparaison Productivité Solar still Orientation Comparison Productivity ???? ??????? ??????? ???????? ????????? Index. décimale : 626 Génie Climatique Résumé : A computer program has been developed to simulate the effect of the orientations (east– west and south–north), on the performance of a symmetric double slope solar still compared to those of an asymmetric solar still with a double effect, in order to obtain the optimum design parameters for both types, under climatic conditions of Constantine (Eastern area of Algeria), using meteorological data of 1st August of 2005 as the hottest day selected from the
last decade (2002–2012). The obtained results show that10° is the optimum inclination angle that allows receiving a maximum solar radiation for both stills by increasing the evaporation condensation processes. A water depth of 0.02 m gives higher daily production. The stability of solar radiation seen in a south–north orientation leads to high reception of solar radiation by both stills.The coefficient of heat transfer by evaporation has contributed in major in the production of solar stills (70%), followed by the coefficient of heat transfer by radiation (23%), and the left is for the heat transfer by convection (7%). The practical limit of optimal insulation thickness that gives the maximum efficiency of the two systems of distillation is about 0.10 m. As a consequence, the daily productivity of an asymmetric still, with a double effect process is found higher than that corresponding to the symmetric one with a double slope system, and where at the south–north orientation we notice an increase of 22.57% and at the east–west orientation it is of 16.23%. It is shown also that a south–north orientation enhances the performance of the asymmetric still with a double effect by 16.76%.
Diplôme : Doctorat en sciences En ligne : ../theses/gclim/TRA6716.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9907 Etude et modélisation de deux distillateurs solaires symétrique et asymétrique à effet de serre [texte imprimé] / Abderachid Trad, Auteur ; Abdenacer Kaabi, Directeur de thèse . - constantine (Route ain el bey, Algérie) : Université Constantine 1, 2014 . - 242 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : Distillateur solaire orientation comparaison Productivité Solar still Orientation Comparison Productivity ???? ??????? ??????? ???????? ????????? Index. décimale : 626 Génie Climatique Résumé : A computer program has been developed to simulate the effect of the orientations (east– west and south–north), on the performance of a symmetric double slope solar still compared to those of an asymmetric solar still with a double effect, in order to obtain the optimum design parameters for both types, under climatic conditions of Constantine (Eastern area of Algeria), using meteorological data of 1st August of 2005 as the hottest day selected from the
last decade (2002–2012). The obtained results show that10° is the optimum inclination angle that allows receiving a maximum solar radiation for both stills by increasing the evaporation condensation processes. A water depth of 0.02 m gives higher daily production. The stability of solar radiation seen in a south–north orientation leads to high reception of solar radiation by both stills.The coefficient of heat transfer by evaporation has contributed in major in the production of solar stills (70%), followed by the coefficient of heat transfer by radiation (23%), and the left is for the heat transfer by convection (7%). The practical limit of optimal insulation thickness that gives the maximum efficiency of the two systems of distillation is about 0.10 m. As a consequence, the daily productivity of an asymmetric still, with a double effect process is found higher than that corresponding to the symmetric one with a double slope system, and where at the south–north orientation we notice an increase of 22.57% and at the east–west orientation it is of 16.23%. It is shown also that a south–north orientation enhances the performance of the asymmetric still with a double effect by 16.76%.
Diplôme : Doctorat en sciences En ligne : ../theses/gclim/TRA6716.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=9907 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
Titre : Éléments Poutres en Béton Ordinaire Armé(BOA) et en Béton de Sable Armé (BSA) en Flexion : étude comparative Type de document : texte imprimé Auteurs : Karima Benahmed, Auteur ; A Tekkouk, Directeur de thèse ; C Amouri, Auteur Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2015 Importance : 207 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Tags : Matériaux Béton de Sable Armé Béton Ordinaire Armé Flexion simple Comparaison Sand Reinforced Concrete Ordinary Reinforced Concrete Simple bending ???????? ??????? ??????? ???????? ?????? ???????? Index. décimale : 624 Génie civil Résumé : The compilation of concrete is very extensive; a designer that holds sand concrete like material for a building element has an approach of thought concrete.
This study aimed to estimate the BENEFIT that can bring a reinforced concrete sand (RCS) compared to ordinary reinforced concrete (ORC) by comparison between two concretes, it is based on the analysis of a section of a beam in reinforced concrete subjected to the simple bending at the ultimate limit state.
The choice of steel and concrete stress-strain diagrams is essential, because the objective of a designer is the optimal use of these materials.
In order that materials reach their maximum, the study must be conducted at the ultimate limit state of resistance by crushing concrete, namely the Pivot-B, which corresponds to a relative deformation of the most compressed fibber of concrete reaching its maximum ɛcu, at the same time getting stretched and compressed frames to work in plastic domain to ensure an economic section reinforced concrete that will have a slow break and gives warnings in case of ruin.
The analysis on which the comparative study is based, uses a long analytical method, which involves a set of interdependent parameters (fck, fyk, d’,...) and three variables (M, Ast, and Asc: respectively the bending moment, compressed and stretched steel sections), so it was considered more beneficial to associate with analytical processing graphic treatment by developing charts three-input developed to be used in this comparison, these charts are easy and fast to use with less risk of errors.
The actual calculation is laborious and requires the input of a tool. In this sense a program computation proposed for the realization of these chart, existed under the QBASIC software, but in this work it has been used under the MATLAB software.
In order to directly deduct the BENEFIT made by (RCS) over the (ORC) and operate a greater number of variants of parameters taking into account their impact on these BENEFITS, another computer calculation program has been developed under MATLAB software, this program gives better results and minimizes even more the risk of errors.
This study ends with an estimate of the BENEFITS made by (RCS) section compared to the (ORC) section, in addition to the conclusions.Diplôme : Magistère En ligne : ../theses/gcivil/BEN6906.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10241 Éléments Poutres en Béton Ordinaire Armé(BOA) et en Béton de Sable Armé (BSA) en Flexion : étude comparative [texte imprimé] / Karima Benahmed, Auteur ; A Tekkouk, Directeur de thèse ; C Amouri, Auteur . - [S.l.] : جامعة الإخوة منتوري قسنطينة, 2015 . - 207 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Tags : Matériaux Béton de Sable Armé Béton Ordinaire Armé Flexion simple Comparaison Sand Reinforced Concrete Ordinary Reinforced Concrete Simple bending ???????? ??????? ??????? ???????? ?????? ???????? Index. décimale : 624 Génie civil Résumé : The compilation of concrete is very extensive; a designer that holds sand concrete like material for a building element has an approach of thought concrete.
This study aimed to estimate the BENEFIT that can bring a reinforced concrete sand (RCS) compared to ordinary reinforced concrete (ORC) by comparison between two concretes, it is based on the analysis of a section of a beam in reinforced concrete subjected to the simple bending at the ultimate limit state.
The choice of steel and concrete stress-strain diagrams is essential, because the objective of a designer is the optimal use of these materials.
In order that materials reach their maximum, the study must be conducted at the ultimate limit state of resistance by crushing concrete, namely the Pivot-B, which corresponds to a relative deformation of the most compressed fibber of concrete reaching its maximum ɛcu, at the same time getting stretched and compressed frames to work in plastic domain to ensure an economic section reinforced concrete that will have a slow break and gives warnings in case of ruin.
The analysis on which the comparative study is based, uses a long analytical method, which involves a set of interdependent parameters (fck, fyk, d’,...) and three variables (M, Ast, and Asc: respectively the bending moment, compressed and stretched steel sections), so it was considered more beneficial to associate with analytical processing graphic treatment by developing charts three-input developed to be used in this comparison, these charts are easy and fast to use with less risk of errors.
The actual calculation is laborious and requires the input of a tool. In this sense a program computation proposed for the realization of these chart, existed under the QBASIC software, but in this work it has been used under the MATLAB software.
In order to directly deduct the BENEFIT made by (RCS) over the (ORC) and operate a greater number of variants of parameters taking into account their impact on these BENEFITS, another computer calculation program has been developed under MATLAB software, this program gives better results and minimizes even more the risk of errors.
This study ends with an estimate of the BENEFITS made by (RCS) section compared to the (ORC) section, in addition to the conclusions.Diplôme : Magistère En ligne : ../theses/gcivil/BEN6906.pdf Format de la ressource électronique : Permalink : https://bu.umc.edu.dz/md/index.php?lvl=notice_display&id=10241 Exemplaires
Code-barres Cote Support Localisation Section Disponibilité aucun exemplaire
