Résultat de la recherche
27 recherche sur le tag
'pérformance' 
Visionner les documents numériques
Affiner la recherche Générer le flux rss de la recherche
Partager le résultat de cette recherche Interroger des sources externesPerformances des systèmes frigorifiques trans-critiques utilisant le CO2 comme fluide frigorigène / Nabil Khellaf
Titre : Performances des systèmes frigorifiques trans-critiques utilisant le CO2 comme fluide frigorigène Type de document : texte imprimé Auteurs : Nabil Khellaf, Auteur ; Rabah Gomri, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 161 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie ClimatiqueTags : Réfrigération Cycles Trans-critiques Dioxyde de Carbone Transfert de Chaleur Évaporation Simulation Optimisation Performance Refrigeration transcritical cycles Carbon Dioxide Heat Transfer Evaporation Optimization التبريد دورات عبر حرجة ثاني أكسيد الكربون انتقال الحرارة التبخر محاكاة التحسين الأداء Index. décimale : 626 Génie Climatique Résumé : The negative impact of synthetic fluids on the environment has led researchers to
natural refrigerants, although these fluids are not harmful on the environment, some of them are dangerous because of their flammability and toxicity. Therefore, carbon dioxide goes into very good position among the other natural fluids. The thermodynamic properties of CO2 require a trans-critical cycle. Unfortunately, this cycle has low performance compared to conventional cycles. The main objective of this work is to improve the performance of the refrigeration systems using CO2 as refrigerant and study the heat transfer of carbon dioxide in evaporation.
Based on the first law of thermodynamics and the optimization analysis several trans-critical cycles were studied, in addition, new proposed cycles have been proposed and studied.
As regards the study of heat transfer during evaporation of CO2, literature review has shown that there are several correlations used to predict the coefficient of heat transfer. In order to evaluate these correlations and select the best correlation allowing the optimal design of evaporator, which ensures the required cooling capacity, an experimental database was extracted from different papers available in the literature and compared with these correlations.
Diplôme : Doctorat En ligne : ../theses/gclim/KHE6996.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10398 Performances des systèmes frigorifiques trans-critiques utilisant le CO2 comme fluide frigorigène [texte imprimé] / Nabil Khellaf, Auteur ; Rabah Gomri, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2017 . - 161 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie ClimatiqueTags : Réfrigération Cycles Trans-critiques Dioxyde de Carbone Transfert de Chaleur Évaporation Simulation Optimisation Performance Refrigeration transcritical cycles Carbon Dioxide Heat Transfer Evaporation Optimization التبريد دورات عبر حرجة ثاني أكسيد الكربون انتقال الحرارة التبخر محاكاة التحسين الأداء Index. décimale : 626 Génie Climatique Résumé : The negative impact of synthetic fluids on the environment has led researchers to
natural refrigerants, although these fluids are not harmful on the environment, some of them are dangerous because of their flammability and toxicity. Therefore, carbon dioxide goes into very good position among the other natural fluids. The thermodynamic properties of CO2 require a trans-critical cycle. Unfortunately, this cycle has low performance compared to conventional cycles. The main objective of this work is to improve the performance of the refrigeration systems using CO2 as refrigerant and study the heat transfer of carbon dioxide in evaporation.
Based on the first law of thermodynamics and the optimization analysis several trans-critical cycles were studied, in addition, new proposed cycles have been proposed and studied.
As regards the study of heat transfer during evaporation of CO2, literature review has shown that there are several correlations used to predict the coefficient of heat transfer. In order to evaluate these correlations and select the best correlation allowing the optimal design of evaporator, which ensures the required cooling capacity, an experimental database was extracted from different papers available in the literature and compared with these correlations.
Diplôme : Doctorat En ligne : ../theses/gclim/KHE6996.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10398 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité KHE/6996 KHE/6996 Thèse Bibliothèque principale Thèses Disponible
Titre : Influence de l’apporten vitamines et antistress sur les performances zootechniques et le profil hématologique chez le poulet de chair. Type de document : texte imprimé Auteurs : Nedjma Choudar, Auteur ; A. Mekroud, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2019 Importance : 174 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Sciences VétérinairesTags : Hygiene et sante animale:aviculture et Pathologie de la volaille vitamines poulet de chair performances hématologie vitamins broiler performance hematology الفيتامينات دواجن لاحمة كفاؤات وجودةالسلالة الاستقلاب و التعبيرات الدموية Index. décimale : 636 Sciences Vétérinaires Résumé :
Two groups of 200 broilers, strain ISA15, have been raised in the same building with the same ambient conditions, lighting, and feeding, during two periods, the first, in spring time (April- May). ) and the second in the autumn period (October-November).broilers received three vitamin treatments in the drinking water (chicktonic premix, vitE / selenium and antistress, betamint)from 1day to 48 day. In order to avoid cases of rickets or growth retardation, as well as breeding stress , all chickens in the summer treated with chicktonic as miltivitamin and betamint. The lots were identified according to the following therapeutic schema: control lot CH (chicktonic 1ml /, betamint 1ml / then 2ml / l from day 41). Lot CH + 41 (chicktonic 1ml / l then 2.5 ml / l from day 41, betamint, same as controllot ). Lot CH + 13 (chicktonic 1ml / l, then increasing the dose gradually from day 13). Lot VitE / Se + 41 (1ml / l then 2.5 ml / l from day 41, betamint, same as controllot ). Lot VitE / Se + 13 (1ml / l, then increase the dose gradually from day 13). Lot Bet + 13: chicktonic 1ml / l, betamint 1ml / l, then increase the dose gradually from day 13). The results obtained are significant at the p< 0.05, for live weight, yields, and blood profile. We obtained the best live weight (2821.33 g ± 229.77) with the increase in the dose of vitamin E / Selenium from day 41. Increased doses of chicktonic from day 41 improved performance, IC (2.08 ± 1.0) and IP (358.24 ± 313.25) and CV% (8.3), as well as serum cholesterol (1.23 g / l ± 0.17) and blood glucose (2.34 g / l ± 0.21), but carcass yield (74.70% ± 4.99) and that of organs are better when the doses were increased from day 13. Increasing the selvite dose from day 13 gave a lower IC (1.6 ± 1.6). The organ yield is better with the lowest abdominal fat yield (0.69 ± 0.28). The increase in dose of antistressBetamint, gave a high level of total protein (34.50 g / l ± 4.63), that of cholesterol (1.32 g / l ± 0.17) and that white blood cells (952.2610 ^ 3 / μl ± 26.60). With respect to the mortality rate, the three treatments gave low values between 0.10% and 0.33%.Diplôme : Doctorat en sciences En ligne : ../theses/veterinaire/CHO7467.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11298 Influence de l’apporten vitamines et antistress sur les performances zootechniques et le profil hématologique chez le poulet de chair. [texte imprimé] / Nedjma Choudar, Auteur ; A. Mekroud, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2019 . - 174 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Sciences VétérinairesTags : Hygiene et sante animale:aviculture et Pathologie de la volaille vitamines poulet de chair performances hématologie vitamins broiler performance hematology الفيتامينات دواجن لاحمة كفاؤات وجودةالسلالة الاستقلاب و التعبيرات الدموية Index. décimale : 636 Sciences Vétérinaires Résumé :
Two groups of 200 broilers, strain ISA15, have been raised in the same building with the same ambient conditions, lighting, and feeding, during two periods, the first, in spring time (April- May). ) and the second in the autumn period (October-November).broilers received three vitamin treatments in the drinking water (chicktonic premix, vitE / selenium and antistress, betamint)from 1day to 48 day. In order to avoid cases of rickets or growth retardation, as well as breeding stress , all chickens in the summer treated with chicktonic as miltivitamin and betamint. The lots were identified according to the following therapeutic schema: control lot CH (chicktonic 1ml /, betamint 1ml / then 2ml / l from day 41). Lot CH + 41 (chicktonic 1ml / l then 2.5 ml / l from day 41, betamint, same as controllot ). Lot CH + 13 (chicktonic 1ml / l, then increasing the dose gradually from day 13). Lot VitE / Se + 41 (1ml / l then 2.5 ml / l from day 41, betamint, same as controllot ). Lot VitE / Se + 13 (1ml / l, then increase the dose gradually from day 13). Lot Bet + 13: chicktonic 1ml / l, betamint 1ml / l, then increase the dose gradually from day 13). The results obtained are significant at the p< 0.05, for live weight, yields, and blood profile. We obtained the best live weight (2821.33 g ± 229.77) with the increase in the dose of vitamin E / Selenium from day 41. Increased doses of chicktonic from day 41 improved performance, IC (2.08 ± 1.0) and IP (358.24 ± 313.25) and CV% (8.3), as well as serum cholesterol (1.23 g / l ± 0.17) and blood glucose (2.34 g / l ± 0.21), but carcass yield (74.70% ± 4.99) and that of organs are better when the doses were increased from day 13. Increasing the selvite dose from day 13 gave a lower IC (1.6 ± 1.6). The organ yield is better with the lowest abdominal fat yield (0.69 ± 0.28). The increase in dose of antistressBetamint, gave a high level of total protein (34.50 g / l ± 4.63), that of cholesterol (1.32 g / l ± 0.17) and that white blood cells (952.2610 ^ 3 / μl ± 26.60). With respect to the mortality rate, the three treatments gave low values between 0.10% and 0.33%.Diplôme : Doctorat en sciences En ligne : ../theses/veterinaire/CHO7467.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11298 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité CHO/7467 CHO/7467 Thèse Bibliothèque principale Thèses Disponible
Titre : Contribution à l'amélioration des performances d'un séparateur statique tourbillonnaire Type de document : texte imprimé Auteurs : Michel Pellerej ; M. Alquier, Directeur de thèse ; Institut national polyyechnique, Éditeur scientifique Année de publication : 1981 Importance : 281 p. Note générale : Disponible au magasin de la bibliothèque centrale Langues : Français (fre) Catégories : Français - Anglais
Génie MécaniqueTags : pérformance Séparateur Index. décimale : 620 Génie Mécanique Permalink : index.php?lvl=notice_display&id=909 Contribution à l'amélioration des performances d'un séparateur statique tourbillonnaire [texte imprimé] / Michel Pellerej ; M. Alquier, Directeur de thèse ; Institut national polyyechnique, Éditeur scientifique . - 1981 . - 281 p.
Disponible au magasin de la bibliothèque centrale
Langues : Français (fre)
Catégories : Français - Anglais
Génie MécaniqueTags : pérformance Séparateur Index. décimale : 620 Génie Mécanique Permalink : index.php?lvl=notice_display&id=909 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité PEL/2294 PEL/2294 Thèse Bibliothèque principale Thèses Disponible
Titre : American cultural imperialism and Chinese resistance through performance : from a postcolonial perspective. Type de document : texte imprimé Auteurs : Allal Belaid, Auteur ; Brahim Harouni, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 226 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Anglais (eng) Catégories : Français - Anglais
Langue AnglaiseTags : The United States China Imperialism Hegemony Americanization CultureIdeology Resistance Performance Etats-Unis Chine Impérialisme Hégémonie Américanisation Culture Idéologie Résistance الولايات المتحدة الصين الامبريالية الهيمنة الثقافة الاديولوجية المقاومة التطور Index. décimale : 420 Anglais et vieil anglais (anglo-saxon) : indice de base 42 Résumé : The wide spread of American culture has recently triggered a controversial debate among scholars in the field of Humanities. The hegemonic phenomenon has affected societies from different corners of the globe, and it appears that even most conservative societies are not safe from such global homogenization. Accordingly, this thesis attempts to describe and analyze American cultural imperialism in light of the twenty-first century global changes and cultural configurations. From a postcolonial view, it examines the complex relationship within the American-Chinese couple. The theoretical part is devoted to study and define the key concepts and their relation with Uncle Sam's expansionist culture. It provides an overall picture of the classic history of the United States to underline the fact that culture has always been the basis of American hegemonic practices around the world. From its creation to the globalization era, passing through continental Americanization, the US has chiefly relied on culture to build up its modern empire. On the way, the thesis examines Chinese society to give evidences about cultural expansion and its impacts on both social structure and consumption. It synthesizes that culture has a great role in controlling societies and more importantly in gaining the US ideological and consuming markets. At last, the thesis investigates the reaction of the Chinese administration, with at its head the Communist Party, against American cultural incursion that plainly impacted Chinese identity and sovereignty. It goes through three important performances which show how China converted a cultural struggle against American imperialism into a prosperous cultural move.
Diplôme : Doctorat En ligne : ../theses/anglais/BEL1521.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10965 American cultural imperialism and Chinese resistance through performance : from a postcolonial perspective. [texte imprimé] / Allal Belaid, Auteur ; Brahim Harouni, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 226 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Anglais (eng)
Catégories : Français - Anglais
Langue AnglaiseTags : The United States China Imperialism Hegemony Americanization CultureIdeology Resistance Performance Etats-Unis Chine Impérialisme Hégémonie Américanisation Culture Idéologie Résistance الولايات المتحدة الصين الامبريالية الهيمنة الثقافة الاديولوجية المقاومة التطور Index. décimale : 420 Anglais et vieil anglais (anglo-saxon) : indice de base 42 Résumé : The wide spread of American culture has recently triggered a controversial debate among scholars in the field of Humanities. The hegemonic phenomenon has affected societies from different corners of the globe, and it appears that even most conservative societies are not safe from such global homogenization. Accordingly, this thesis attempts to describe and analyze American cultural imperialism in light of the twenty-first century global changes and cultural configurations. From a postcolonial view, it examines the complex relationship within the American-Chinese couple. The theoretical part is devoted to study and define the key concepts and their relation with Uncle Sam's expansionist culture. It provides an overall picture of the classic history of the United States to underline the fact that culture has always been the basis of American hegemonic practices around the world. From its creation to the globalization era, passing through continental Americanization, the US has chiefly relied on culture to build up its modern empire. On the way, the thesis examines Chinese society to give evidences about cultural expansion and its impacts on both social structure and consumption. It synthesizes that culture has a great role in controlling societies and more importantly in gaining the US ideological and consuming markets. At last, the thesis investigates the reaction of the Chinese administration, with at its head the Communist Party, against American cultural incursion that plainly impacted Chinese identity and sovereignty. It goes through three important performances which show how China converted a cultural struggle against American imperialism into a prosperous cultural move.
Diplôme : Doctorat En ligne : ../theses/anglais/BEL1521.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10965 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BEL/1521 BEL/1521 Thèse Bibliothèque principale Thèses Disponible 
Titre : Analyse des annotations dans les productions écrites des élèves de la 4ème année moyenne Type de document : texte imprimé Auteurs : Nadjia Bestandji, Auteur ; Daouia Hanachi, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2013 Importance : 229 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles Langues : Français (fre) Catégories : Français - Anglais
Langue FrançaiseTags : annotation performance travail erreur performances work error الملاحظة المستوى العمل الخطأ Index. décimale : 440 Langues romanes. Français Résumé : The annotation constitutes an essential device to help the pupils to improve their performances. Indeed, when a teacher gives an annotated work, the pupil, for little that it includes/understands the remarks that are made to him, has auto-évaluatives reactions that have effects on its later behaviors. Our study consisted in examining, on the one hand, the appreciations related to the copy, on the other hand, the way in which the errors are announced to the pupils. According to the result of the analysis, we made a certain number of proposals aiming at improving the FLE. Diplôme : Magistère En ligne : ../theses/francais/BES1333.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=6328 Analyse des annotations dans les productions écrites des élèves de la 4ème année moyenne [texte imprimé] / Nadjia Bestandji, Auteur ; Daouia Hanachi, Directeur de thèse . - constantine [Algérie] : Université Constantine 1, 2013 . - 229 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Langue FrançaiseTags : annotation performance travail erreur performances work error الملاحظة المستوى العمل الخطأ Index. décimale : 440 Langues romanes. Français Résumé : The annotation constitutes an essential device to help the pupils to improve their performances. Indeed, when a teacher gives an annotated work, the pupil, for little that it includes/understands the remarks that are made to him, has auto-évaluatives reactions that have effects on its later behaviors. Our study consisted in examining, on the one hand, the appreciations related to the copy, on the other hand, the way in which the errors are announced to the pupils. According to the result of the analysis, we made a certain number of proposals aiming at improving the FLE. Diplôme : Magistère En ligne : ../theses/francais/BES1333.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=6328 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BES/1333 BES/1333 Thèse Bibliothèque principale Thèses Disponible Documents numériques
texte intégraleAdobe Acrobat PDF
Permalink
PermalinkPermalink
Permalink
Permalink
Permalink
Permalink
Permalink
Permalink
Permalink
PermalinkChoix et optimisation des paramètres de fonctionnement d'un capteur solaire utilise pour la climatisation / Amel Ghellab
Permalink
Permalink
