Institutional repository of university M'Hamed Bougara Boumerdes
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دور المؤسسات الناشئة في تفعيل التنمية المحلية : دراسة ميدانية ببلدية المسيلة 2019/2023
No full text276 ص. ، 30 سمهدفت هذه الدراسة إلى إبراز الدور الذي تلعبه المؤسسات الناشئة كأحد العوامل والفواعل المهمة في تفعيل التنمية المحلية ، خاصة في ظل التزايد الكبير للإهتمام بالموضوع ليس من قبل الأساتذة والباحثين فحسب بل أصبحت تحتل مكانة مميزة لدى صناع القرار لحل الكثير من المشاكل الإقتصادية وتحقيق نتائج مثمرة في ظل الصعوبات التي تعرفها المؤسسات والشركات الكبرى على مختلف الأصعدة.
تم تخصيص الجزء النظري للدراسة والتقرب ومعرفة المفاهيم المتعلقة بالمؤسسات الناشئة وحاضنات الأعمال كآلية مرتبطة بها ، ومعرفة مكانتها في التنمية المحلية خاصة في ظل الإهتمام والمكانة المتزايدة لها في اقتصاديات الدول الكبرى ، بالنسبة للجزائر وإدراكا منها لدور المؤسسات الناشئة في إحداث تنمية محلية عملت الدولة إلى توفير إطار ملائم بها خاصة بعد استحداث وزارة منتدبة ، واستكمالا لهذا المسار ولو بشكل متأخر استحداث كذلك هيئات لدعمها وتمويلها ويأتي الصندوق الخاص بتمويل المؤسسات الناشئة على رأسها.
وعن دراسة الحالة الميدانية ، تم اختيار بلدية المسيلة كبلدية رائدة في ولايات الوطن بفضل وجود حاضنة الأعمال على مستوى جامعة المسيلة والتي تخرجت منها العديد من المشاريع وهي الآن مؤسسات ناشطة في الميدان ، ولها نتائج طيبة من خلال توفير العديد من السلع والمناصب للشباب البطال والإنفتاح على نشاطات وقطاعات مختلفة ومتنوعة.
وفي الأخير توصلت الدراسة إلى العديد من النتائج ،أبرزها الحاجة إلى الأخذ بهذه التجربة (المؤسسات الناشئة) وتعميمها على باقي بلديات الوطن ،خاصة أنها لعبت دورا مهما في التنمية الإجتماعية والإقتصادية للسكان المحليين ببلدية المسيلة ،إضافة إلى تشجيع وتنوييع الحركية الاقتصادية على المستوى المحلي ،الأمر الذي يمكن أن يعطي نتائج أكثر إيجابية في حال الاستفادة من الأخطاء وتصحيح المسار القائم سابقا على موارد النفط والطاقة ،وضرورة أن يكون الإقتصاد الصغير هو الركيزة الأساسية والمحرك للإقتصاد العام للبلاد مستقبل
Fundamental Electronic 1: Course Handout For L2 students: License LMD & Engineering Major: Electrical Engineering groups-ST
No full textCourse description:
Electronics can be classified into two primary categories according to their functions:
analogue and digital. They employ several techniques for signal processing and transmission,
in addition to measurement and control. In contrast to digital circuits, which operate with
discrete values that alternate between two states (often 0 and 1), analogue circuits utilize
continuous or alternative currents and voltages that vary over time.
The course handout "Fundamental Electronic 1" includes the analogue electronics
component and reflects the culmination of sixteen years of presenting analogue electronics
program at Boumerdes University’s Faculty of Technology.
This course material is developed in accordance with the course outline established by the
National Pedagogical Committee of the Science and Technology Domain (CPND-ST) and is
designed for second-year students in the LMD license and engineering program for the
electrical engineering group, domain Sciences and Technology (ST). This program aims to
familiarize students with the field of electronics, providing to both beginners and those seeking
to enhance their comprehension of electronic principles.
Upon completion of the handout, you will possess a solid understanding of fundamental
electrical principles and be equipped to explore more difficult topics in subsequent educational
years. Furthermore, it is essential to remember that the analysis of electronic circuits demands
extensive study and extra practice.
The course is structured into five chapters. In this handout, we will explore key concepts
such as fundamental theorems for electronic circuit analysis and two-port networks. We will
also introduce the essential electronic components like diode, transistor, and operational
amplifier.
The first chapter examines the fundamental theorem for electronic circuit analysis,
beginning with the Kirchhoff law. Moreover, profound theorems such as Superposition,
Thevenin, Millman, and Norton are thoroughly examined using pertinent application examples.
The second chapter focuses on two-port networks and passive filters, discussing their
properties, parameters, and representations and providing mathematical expressions for these
xii
representations. The second part explores passive filters, including high-pass and low-pass
filters, their properties, frequency responses, and connection configurations.
The third chapter will delve into the operation mechanisms, characteristic curves, and
applications of the diode.
In the fourth chapter, we will describe the bipolar transistor, studying its properties and
operating modes, and then we will analyze its usage and applications.
In the final chapter, we will examine operational amplifiers (OAs), beginning with their
schematic symbol, analyzing their principal characteristics, and investigating their diverse
applications.
The handout includes an appendix at the end, representing the module content according to
the CPND-ST framework proposed in 2018/2019
Automatisation de la nouvelle unité de production d’Azote au sein du complexe «GL3/Z»
No full text114 p. : ill. ; 30 cmNotre Mission consiste à réaliser l'automatisation et la supervision de la nouvelle unité de production d'azote au sein du complexe GL3/Z. Dans un premier temps, nous entreprenons une étude approfondie du fonctionnement de l'unité en exploitant l'ensemble de la documentation disponible, incluant les diagrammes logiques, les documents de contrôle narratif et les schémas P&ID. Par la suite, nous procéderons à la sélection du matériel nécessaire, notamment l'automate programmable et les modules d'entrées/sorties, avant d'identifier les entrées/sorties requises pour contrôler les séquences de démarrage, d'arrêt et d'urgence. Pour le développement du programme et la conception de l'interface HMI, nous avons opté pour l'utilisation de l'automate programmable industriel Siemens S7 1500. La simulation et la vérification du programme ont été réalisées à l'aide du logiciel TIA Portal
Machine learning-based Shapley additive explanations approach for corroded pipeline failure mode identification
No full textRapid failure mode identification of oil and gas pipelines can prevent catastrophic consequences, improve fast intervention and enhance the design safety of these critical systems. This paper proposes explainable-based machine learning models using to determine the failure mode of corroded pipelines as a function of geometric configurations, material properties, and corrosion defect details. To determine the best identification model, this study examined eight machine learning models, including Nave Bayes, K-Nearest Neighbors, Decision Tree, Random Forest, Adaptive Boosting, Extreme Gradient Boosting, Light Gradient Boosting Machine, and Category Boosting, based on a comprehensive experimental database for steel pipelines with various corrosion/crack defect configurations. Furthermore, the Shapley additive explanations approach is utilized to rank the input variables for failure mode identification and explains the machine learning model predicting a specific failure mode for a given sample. In identifying the failure mode of corroded pipelines, the proposed Extreme Gradient Boosting model indicated the highest accuracy in term of performance evaluation compared to all other proposed models. In addition, the model-explanation findings show that the important parameter influencing the failure mechanism of corroded pipelines is the depth of corrosion defects followed by the pipeline wall thickness. The proposed framework is adaptable enough to allow further use of experimental results for having new insights
Impact de l'encrassement sur l'efficacité énergétique des Aéroréfrigérants «100-AM-101 A/H» : étude de cas et solutions
No full text62 p. : ill. ; 30 cmL'Encrassement des aéroréfrigérants, provoqué par l'accumulation de dépôts sur les surfaces d'échange thermique, réduit considérablement leur efficacité énergétique. Ce phénomène augmente la résistance thermique, réduit le transfert de chaleur et entraîne une consommation d'énergie plus élevée pour maintenir des performances optimales. Cela peut également accélérer la dégradation des matériaux, augmentant ainsi les coûts de maintenance et de réparation et affectant la continuité de la production. Cette étude analyse les facteurs responsables de l'encrassement et ses conséquences, tout en proposant des solutions pour minimiser ce phénomène. L'objectif est d'améliorer l'efficacité énergétique et de prolonger la durée de vie des équipements, tout en réduisant les coûts opérationnels et les interruptions de production
Assessing fragility functions of unreinforced masonry buildings
No full textThe seismic vulnerability entrenched within the historical urban landscapes of
Algeria serves as a poignant reminder of the pressing need for comprehensive risk
management strategies, particularly concerning low and medium height
unreinforced masonry (URM) structures. These architectural gems, rich in cultural
significance, stand as tangible embodiments of Algeria's storied past. However,
their susceptibility to seismic disturbances presents an immediate threat,
demanding meticulous attention and innovative methodologies for effective risk
assessment and mitigation. In a pioneering scholarly pursuit, this research
embarks on an ambitious exploration, melding fragility functions and a
sophisticated vulnerability index method to unravel the intricate tapestry of seismic
risk assessment. Through the lens of fragility functions, the study delves into a
nuanced analysis, probabilistically delineating the vulnerabilities entrenched within
the complex framework of URM buildings. Furthermore, the meticulous derivation
of vulnerability functions via the vulnerability index method enhances the
granularity of risk assessment, providing a multifaceted perspective to discern
vulnerabilities accurately. Central to this investigation is the Belouizdad district, a
microcosm of historical significance nestled within the vibrant metropolis of Algiers.
By scrutinizing seismic scenarios spanning a spectrum of intensities (ranging from
VII to X), the study orchestrates a symphony of empirical data and analytical
prowess, unraveling the potential seismic reverberations poised to impact the
district's architectural heritage. In essence, this scholarly endeavor transcends the
confines of mere academic pursuit, serving as a guiding light illuminating the path
towards tailored seismic reduction policies. It stands as a clarion call to safeguard
Algeria's architectural patrimony, fostering resilience amidst the tremors of uncertainty and ensuring the preservation of its cultural legacy for generations to
come
الأمن الغذائي، الانتاجية الزراعية و الاستثمار الزراعي في الجزائر : تحليل باستعمال نماذج التوازن العام الحسابية
No full text268 ص. ، 30 سمالهدف الرئيسي من هذه الدراسة هو تسليط الضوء على أهمية نماذج التوازن العام MEG)) لدراسة المشاكل المتعلقة بالقطاع الزراعي (الأمن الغذائي، الإنتاجية الزراعية، الاستثمار الزراعي...)، و لقد نجحت هذه النماذج أن تحل محل نماذج الاقتصاد القياسي الكلية في عملية رسم السياسات الاقتصادية عن طريق تحليل اثر الصدمات العشوائية على الاقتصاد من خلال سيناريوهات. من خلال الدراسة يتضح أن نماذج التوازن العام MEG)) أداة تحليلية بد?لة لتق??م السياسات، تمكن من فهم سلوك الوحدات الاقتصادية في مختلف القطاعات و خاصة القطاع الزراعي، ولبناء مثل هذه النماذج من الضروري الحصول على قاعدة بيانات في جميع قطاعات الاقتصاد و إعداد مصفوفة المحاسبة الاجتماعية (MCS) ، كما يتطلب برمجة حاسوب عالية مثل برامج (GAMS
Analysis of a reactive porous separation effects on depollution and indoor air quality: Application of LBM-MRT to heat and mass transfers
No full textThe reduction of energy demand and the indoor air quality associated with energy demand are the main goals of thermal buildings. This work is devoted to the study of the effect of a reactive porous separation on the ventilation (cooling) and depollution capacity in a rectangular room ventilated by air displacement. The model is considered as a cavity heated on its right verticle wall and thermally isolated by the other three walls. A porous separation divides the room into two compartments. The system of equations was solved using the Lattice Boltzmann method with multiple relaxation times. The extended Darcy Brinkman-Forchheimer model was used to simulate the porous material. An additional linear term is added to the standard transport equations (material diffusion) to account for reaction effects, this term was derived from Arrhenius' law. Over a wide range of Richardson and Darcy numbers, the results of the computations show the influence of these parameters on the flow structure, making it possible to categorize the different convection phenomena (natural, forced and mixed). The most important point to note is that the addition of reaction (fixing reaction) improves indoor air quality and can achieve a 55 % reduction in air renewal time, thus saving on energy costs. However, this reactif effect has no influence on the thermal efficiency of the proposed model