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Author: Sergio FERREIRA
Publisher:
ISBN:
Category :
Languages : fr
Pages : 170
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Book Description
Author: Sergio FERREIRA
Publisher:
ISBN:
Category :
Languages : fr
Pages : 170
Get Book Here
Book Description
Author: Simon Morel
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Book Description
Dans un contexte d'électrification massive de nos modes de vie (Transports, Industrie, activités tertiaires), des structures de conversion d'énergie toujours plus performantes ( en terme de sobriété, d'efficacité ou ayant un moindre impact sur l'environnement) sont recherchées. Limitées par l'accès et l'utilisation de matériaux rares ou polluants mais également par leurs coûts de mise en œuvre, nos technologies ont été constamment améliorées et optimisées depuis un siècle mais atteignent aujourd'hui une asymptote. De nouvelles technologies en rupture présentent un moyen de faire des bonds significatifs dans cette évolution mais demandent à être découvertes, analysées, modélisées, vérifiées et mises en valeur par les laboratoires de recherche pour être intégrées par le monde industriel. Cette thèse porte sur l'étude, la modélisation et le dimensionnement d'un système innovant et original associant une électronique de puissance non-linéaire et une machine électrique. Cette technologie, encore très peu étudiée aujourd'hui, offre de nouveaux degrés de liberté dans la conception de la chaine de conversion électromécanique pour la génération d'électricité ou la motorisation par exemple.Ce travail ambitionne donc de proposer une lecture claire du fonctionnement non linéaire de la chaine de conversion proposée et d'en comprendre les bénéfices mais aussi les limites et les coûts. Par non-linéaire, on entend ici que ces systèmes sont capables de modifier la topologie profonde ou fondamentale du circuit ou système dans lequel ils sont mis en œuvre et sont capables d'agir sur la dynamique des tensions et courants. Ils peuvent ainsi agir sur la gestion de l'énergie réactive, le facteur de puissance mais aussi sur les niveaux de tensions et courants et par extension de la puissance active et d'en garantir le contrôle.Le travail synthétisé dans ce manuscrit permet dans un premier temps de recenser les rares exemples adoptant cette philosophie et d'en jeter les bases, permettant à différentes topologies inédites d'y être identifiées. Dans un second volet, une méthodologie de modélisation en phase d'esquisse du système entier est présentée et testée permettant de mener des simulations et des dimensionnements. Fort de cette méthode, un troisième volet conceptuel porte sur son application aux machines électriques et démontre les nouveaux compromis et nouvelles performances possibles, comme l'augmentation sensible des performances mécaniques ou la réduction du volume d'aimant nécessaire. Enfin, un dernier volet expérimental permet de vérifier en pratique les différents résultats théoriques grâce à la mise en place d'un banc d'essai à échelle industrielle.
Author: Willem Willems
Publisher:
ISBN: 9789088903861
Category : Business & Economics
Languages : en
Pages : 434
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Book Description
Water is vital for life, and its availability has been a concern for mankind throughout the ages. Its presence has always been ascertained in a variety of ways and the development of human society everywhere is connected with various forms of water management. Man also needed to manage water to find protection from its dangers and the need for that is increasing. In the coming decades, the impact of climate change is expected to intensify floods and droughts, affect groundwater resources, raise sea levels, increase pollution and enhance the frequency and magnitude of disasters. Societies around the world are challenged to adapt to these threats to ensure water security, economic prosperity and environmental and cultural sustainability. This book deals with the heritage of water management and the use that was made of water, as well as the impact of water management on heritage. An example of the former may be an ancient irrigation system in the Filipines or in the Middle East that still functions today, while the latter may reflect the importance of maintaining groundwater levels for the preservation of organic remains on archaeological sites or of wooden piles underneath standing buildings. In either case the papers in this book reflect the dynamic nature of water, and hence the equally dynamic relation between water management and heritage. This publication follows up on a Heritage and Water conference in Amsterdam, the first of its kind. Its main purpose is to credibly present the importance and value of heritage and historical experience for water and sustainable development, and vice versa, present the importance of water management for the protection of heritage. It presents evolving insights and concepts about Water and about Heritage from a variety of disciplines, policy and public perspectives illustrated with cases studies and aims to connect decision makers with experts such as engineers, archaeologists, historians, geographers, ecologist and landscape architects
Author: Sven Boermeester
Publisher:
ISBN: 9781949677072
Category :
Languages : en
Pages :
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Book Description
Innovate Bristol highlights and celebrates those companies and individuals that are actively working at building a better tomorrow for all. Innovation Ecosystems thrive through the involvement and support of companies and individuals from all industries, which is why the Innovate series not only focuses on the innovators but also those people whom the Innovation Ecosystem, would not be able to thrive without.
Author: OECD
Publisher: OECD Publishing
ISBN: 9264545190
Category :
Languages : en
Pages : 152
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Book Description
The artificial intelligence (AI) landscape has evolved significantly from 1950 when Alan Turing first posed the question of whether machines can think. Today, AI is transforming societies and economies. It promises to generate productivity gains, improve well-being and help address global challenges, such as climate change, resource scarcity and health crises.
Author: Roy MacLeod
Publisher: Springer Science & Business Media
ISBN: 1402054904
Category : Science
Languages : en
Pages : 292
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Book Description
This book represents a first considered attempt to study the factors that conditioned industrial chemistry for war in 1914-18. Taking a comparative perspective, it reflects on the experience of France, Germany, Austria, Russia, Britain, Italy and Russia, and points to significant similarities and differences. It looks at changing patterns in the organisation of industry, and at the emerging symbiosis between science, industry and the military.
Author: Alan D. Lopez
Publisher: World Bank Publications
ISBN: 0821362631
Category : Medical
Languages : en
Pages : 511
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Book Description
Strategic health planning, the cornerstone of initiatives designed to achieve health improvement goals around the world, requires an understanding of the comparative burden of diseases and injuries, their corresponding risk factors and the likely effects of invervention options. The Global Burden of Disease framework, originally published in 1990, has been widely adopted as the preferred method for health accounting and has become the standard to guide the setting of health research priorities. This publication sets out an updated assessment of the situation, with an analysis of trends observed since 1990 and a chapter on the sensitivity of GBD estimates to various sources of uncertainty in methods and data.
Author: Stephenie Meyer
Publisher: Little, Brown Books for Young Readers
ISBN: 0316007447
Category : Young Adult Fiction
Languages : en
Pages : 379
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Book Description
Fall in love with the addictive, suspenseful love story between a teenage girl and a vampire with the book that sparked a "literary phenomenon" and redefined romance for a generation (New York Times). Isabella Swan's move to Forks, a small, perpetually rainy town in Washington, could have been the most boring move she ever made. But once she meets the mysterious and alluring Edward Cullen, Isabella's life takes a thrilling and terrifying turn. Up until now, Edward has managed to keep his vampire identity a secret in the small community he lives in, but now nobody is safe, especially Isabella, the person Edward holds most dear. The lovers find themselves balanced precariously on the point of a knife -- between desire and danger. Deeply romantic and extraordinarily suspenseful, Twilight captures the struggle between defying our instincts and satisfying our desires. This is a love story with bite. It's here! #1 bestselling author Stephenie Meyer makes a triumphant return to the world of Twilight with the highly anticipated companion, Midnight Sun: the iconic love story of Bella and Edward told from the vampire's point of view. "People do not want to just read Meyer's books; they want to climb inside them and live there." -- Time "A literary phenomenon." -- The New York Times
Author: Aditya Johri
Publisher: Cambridge University Press
ISBN: 1107785855
Category : Technology & Engineering
Languages : en
Pages : 1124
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Book Description
The Cambridge Handbook of Engineering Education Research is the critical reference source for the growing field of engineering education research, featuring the work of world luminaries writing to define and inform this emerging field. The Handbook draws extensively on contemporary research in the learning sciences, examining how technology affects learners and learning environments, and the role of social context in learning. Since a landmark issue of the Journal of Engineering Education (2005), in which senior scholars argued for a stronger theoretical and empirically driven agenda, engineering education has quickly emerged as a research-driven field increasing in both theoretical and empirical work drawing on many social science disciplines, disciplinary engineering knowledge, and computing. The Handbook is based on the research agenda from a series of interdisciplinary colloquia funded by the US National Science Foundation and published in the Journal of Engineering Education in October 2006.
Author: Unesco
Publisher: UNESCO
ISBN: 9231041568
Category : Technology & Engineering
Languages : en
Pages : 392
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Book Description
This report reviews engineering's importance to human, economic, social and cultural development and in addressing the UN Millennium Development Goals. Engineering tends to be viewed as a national issue, but engineering knowledge, companies, conferences and journals, all demonstrate that it is as international as science. The report reviews the role of engineering in development, and covers issues including poverty reduction, sustainable development, climate change mitigation and adaptation. It presents the various fields of engineering around the world and is intended to identify issues and challenges facing engineering, promote better understanding of engineering and its role, and highlight ways of making engineering more attractive to young people, especially women.--Publisher's description.
