Application d'une méthode de continuation à la résolution d'un problème de diffusion-réaction et à l'optimisation de quelques systèmes d'origine biochimique PDF Download
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Book Description
Cette thèse se décompose en deux parties. Elle est consacrée à la résolution numérique de divers problèmes non-linéaires à l'aide d'une méthode de continuation. La première partie traite d'un problème de diffusion-réaction dans une membrane enzymatique chargée. La résolution de ce problème de perturbation singulière est délicate et couteuse par les moyens traditionnels. L'étude asymptotique du problème permet de dégager un problème non perturbé dont la résolution est plus aisée et conduit sans difficulté à une approximation de la différence de potentiel dans la membrane. La résolution de ce problème en fonction de divers paramètres est facilitée par l'emploi d'une méthode de continuation. La seconde partie, quant à elle, est consacrée à la résolution de quelques problèmes d'optimisation dans des systèmes à état multiples. Nous utilisons une méthode de minimisation classique pour rechercher soit un point limite, soit un point de bifurcation de Hopf sur une branche d'états stationnaires d'un système différentiel. Le contrôle dans les systèmes distribués est ensuite abordé par une méthode de pénalisation ou à l'aide d'une méthode d'optimisation déduite d'une méthode de continuation. Enfin l'optimisation d'un point de doublement de période a été réalisée par cette dernière méthode.
Book Description
Cette thèse se décompose en deux parties. Elle est consacrée à la résolution numérique de divers problèmes non-linéaires à l'aide d'une méthode de continuation. La première partie traite d'un problème de diffusion-réaction dans une membrane enzymatique chargée. La résolution de ce problème de perturbation singulière est délicate et couteuse par les moyens traditionnels. L'étude asymptotique du problème permet de dégager un problème non perturbé dont la résolution est plus aisée et conduit sans difficulté à une approximation de la différence de potentiel dans la membrane. La résolution de ce problème en fonction de divers paramètres est facilitée par l'emploi d'une méthode de continuation. La seconde partie, quant à elle, est consacrée à la résolution de quelques problèmes d'optimisation dans des systèmes à état multiples. Nous utilisons une méthode de minimisation classique pour rechercher soit un point limite, soit un point de bifurcation de Hopf sur une branche d'états stationnaires d'un système différentiel. Le contrôle dans les systèmes distribués est ensuite abordé par une méthode de pénalisation ou à l'aide d'une méthode d'optimisation déduite d'une méthode de continuation. Enfin l'optimisation d'un point de doublement de période a été réalisée par cette dernière méthode.
Author: Willem Willems Publisher: ISBN: 9789088903861 Category : Business & Economics Languages : en Pages : 434
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: Clive L. N. Ruggles Publisher: ISBN: 9780954086770 Category : Archaeoastronomy Languages : en Pages : 304
Book Description
This joint venture between ICOMOS, the advisory body to UNESCO on cultural sites, and the International Astronomical Union is the second volume in an ongoing exploration of themes and issues relating to astronomical heritage in particular and to science and technology heritage in general. It examines a number of key questions relating to astronomical heritage sites and their potential recognition as World Heritage, attempting to identify what might constitute "outstanding universal value" in relation to astronomy. "Heritage Sites of Astronomy and Archaeoastronomy--Volume 2" represents the culmination of several years' work to address some of the most challenging issues raised in the first ICOMOS-IAU Thematic Study, published in 2010. These include the recognition and preservation of the value of dark skies at both cultural and natural sites and landscapes; balancing archaeoastronomical considerations in the context of broader archaeological and cultural values; the potential for serial nominations; and management issues such as preserving the integrity of astronomical sightlines through the landscape.Its case studies are developed in greater depth than those in volume 1, and generally structured as segments of draft nomination dossiers. They include seven-stone antas (prehistoric dolmens) in Portugal and Spain, the thirteen towers of Chankillo in Peru, the astronomical timing of irrigation in Oman, Pic du Midi de Bigorre Observatory in France, Baikonur Cosmodrome in Kazakhstan, and Aoraki-Mackenzie International Dark Sky Reserve in New Zealand. A case study on Stonehenge, already a World Heritage Site, focuses on preserving the integrity of the solstitial sightlines.As for the first ICOMOS-IAU Thematic Study, a international team of authors including historians, astronomers and heritage professionals is led by Professor Clive Ruggles for the IAU and Professor Michel Cotte for ICOMOS.
Author: Francis Rouessac Publisher: John Wiley & Sons ISBN: 1118681878 Category : Science Languages : en Pages : 494
Book Description
Completely revised and updated, Chemical Analysis: Second Edition is an essential introduction to a wide range of analytical techniques and instruments. Assuming little in the way of prior knowledge, this text carefully guides the reader through the more widely used and important techniques, whilst avoiding excessive technical detail. Provides a thorough introduction to a wide range of the most important and widely used instrumental techniques Maintains a careful balance between depth and breadth of coverage Includes examples, problems and their solutions Includes coverage of latest developments including supercritical fluid chromatography and capillary electrophoresis
Author: Satinder Kaur Brar Publisher: Elsevier ISBN: 0128030046 Category : Science Languages : en Pages : 530
Book Description
Platform Chemical Biorefinery: Future Green Chemistry provides information on three different aspects of platform chemical biorefinery. The book first presents a basic introduction to the industry beneficial for university students, then provides engineering details of existing or potential platform chemical biorefinery processes helpful to technical staff of biorefineries. Finally, the book presents a critical review of the entire platform chemical biorefinery process, including extensive global biorefinery practices and their potential environmental and market-related consequences. Platform chemicals are building blocks of different valuable chemicals. The book evaluates the possibility of renewable feedstock-based platform chemical production and the fundamental challenges associated with this objective. Thus, the book is a useful reference for both academic readers and industry technical workers. The book guides the research community working in the field of platform chemical biorefinery to develop new pathways and technologies in combination with their market value and desirability. - Offers comprehensive coverage of platform chemicals biorefineries, recent advances and technology developments, potential issues for preventing commercialization, and solutions - Discusses existing technologies for platform chemicals production, highlighting benefits as well their possible adverse effects on the environment and food security - Includes a global market analysis of platform chemicals and outlines industry opportunities - Serves as a useful reference for both academic readers and industry technical workers
Author: Satinder Kaur Brar Publisher: ASCE Press ISBN: 9780784414088 Category : Nanotechnology Languages : en Pages : 642
Book Description
This text presents the most current knowledge on the environmental impact of materials and products developed using nanotechnology. Although nanomaterials are revolutionising electronics, medicine, transportation and many other industries, they pose risks to living beings and ecosystems that are barely understood. Leading researchers here consider the science of nanomaterials, their behaviour in the environment, risk assessment and toxicology, and the future of nanomaterials.
Author: Jim Keith Publisher: Illuminet Press ISBN: 9781881532217 Category : Political Science Languages : en Pages : 128
Book Description
The era of chemical and biological megadeath is upon us, and the potential of deadly biowarfare attacks from governments, militant independent groups, and even individuals is far greater than it has been at any time in the past. At this time, more than twenty-five countries are developing, or have stockpiles of chemical and biological weapons, in many cases in sufficient quantities to wipe out the entire population of the world. So far the danger of chemical and biological aggression has been little acknowledged, and, at least in America, little prepared for by federal and local government. Most terrorist threats and attacks are not widely reported in the mainstream media. Although information about the proliferation of man-made diseases is carefully suppressed by governments and the media they will be covered in the pages of this book. Not only is America unprepared and ignorant of what is happening, but the people in government and scientific professions who do know, who should be warning the American public about the dangers of chemical and biological terrorism, are instead doing their utmost to hide this information from us; information that is vital for our survival.The information that is contained in the pages of this book will not be measured or calculated to reassure people that everything is fine, when reassurance is the exact opposite of what is needed at this time. It may even give you nightmares when you realise the real circumstance that we are in. The information in the pages that follow will be the truth about the biowarfare threat to America.
Author: Marta Peris-Ortiz Publisher: Springer ISBN: 3319188577 Category : Business & Economics Languages : en Pages : 280
Book Description
The aim of this book is to show how wine tourism can be used as a model for sustainable economic development, driving economic growth and social development in some locations. It will explore the interaction between tourism and viticulture in wine tourism destinations, while also explaining some of the repercussions of these activities. This book covers various topics including regional development, environmental management, sustainable viticulture, quality management in wineries and wine tourism routes among others. Wine tourism, which combines two important yet distinct economic activities (i.e., tourism and viticulture), has recently emerged as a new tourism product driven by tourists’ search for new experiences and wineries’ need to diversify their businesses and seek new revenue streams to boost sales. This new form of tourism, which typically takes place in rural areas and which combines wine production with tourist activities, is becoming important for such regions by providing a complementary income source. It provides a model for sustainable economic development for these regions, which for various reasons may otherwise struggle to develop. Featuring cases and business implications from various locations, this book provides an important source of knowledge—both theoretical and practical—suitable to academics, scholars, researchers, and practitioners in the tourism sector and the wine industry.
Author: Michael Lee Cain Publisher: Sunderland, Mass. : Sinauer Associates ISBN: 9780393940558 Category : Science Languages : en Pages : 800
Book Description
Thoroughly revised and updated, Discover Biology, Second Edition, presents the essential concepts of modern biology in a text designed specifically for nonmajors. The authors emphasize a level of detail appropriate for nonmajors, freeing instructors to focus on the scientific issues-HIV, global climate change, DNA fingerprinting, genetic engineering, cancer-that students read about in the paper, vote on in elections, and face in their daily lives. With two new chapters, refined pedagogy and art programs, and a powerful ancillary package, Discover Biology, Second Edition, is the best choice for the nonmajors introductory course.
Author: Alain Trubuil
Author: Alain Trubuil
Author: Willem Willems
Author: Clive L. N. Ruggles
Author: Francis Rouessac
Author: Satinder Kaur Brar
Author: Satinder Kaur Brar
Author: Jim Keith
Author: Giuseppe Anastasi
Author: Marta Peris-Ortiz
Author: Michael Lee Cain