Contribution à l'étude de systèmes de transmission numérique à partage en fréquence PDF Download
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Author: Thierry Liethoudt
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Author: Thierry Liethoudt
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
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Author: Fabien Merlaud
Publisher:
ISBN:
Category :
Languages : fr
Pages : 257
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Book Description
Dans les lignes de transmissions optiques où la dispersion chromatique est compensée régulièrement pour laisser une dispersion moyenne positive, dispersion chromatique et effets non linéaires permettent l'existence de Solitons Gérés en Dispersion (SGD) stationnaires et périodiques de comportements analogues aux solitons. Nous étudions les propriétés spectrales, de périodicité, de résistance aux perturbations des SGD via des méthodes variationnelles appliquées à des impulsions gaussiennes chirpées. La théorie des perturbations nous permet de caractériser l'influence du canal de transmission non linéaire: interaction, XPM, ICFWM qui induisent gigues temporelle, d'amplitude et fréquentielle. Puis nous étudions l'influence de techniques de contrôle en ligne classiques: filtrage optique, modulation synchrone de phase ou d'amplitude. Nous terminons par l'étude numérique de systèmes " réalistes ": systèmes terrestres non-linéaires du type SMF/DCF puis transatlantiques à base de NZDSF- et SMF.
Author: NA NA
Publisher: Springer
ISBN: 1349623288
Category : Science
Languages : en
Pages : 334
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Book Description
This book offers an authoritative study of election observation in Africa and its relation with democratization processes. Election observation is a hotly debated issue in contemporary international relations and in political science. It is seen by donor- countries and the international community as a means to enhance democratization, but has been controversial with regard to the `mandates' of the observers, the cases of its misappropriation by authoritarian governments and its masking of other donor-country interests. The book addresses fundamental issues of elections and democrat-ization in Africa, evaluation policies and implementation, as well as the historical backgrounds. A range of case studies leads to new interpretations, which challenge previous empiricist accounts of election observation in Africa. Greater attention to historical and cultural context is required than has been present in previous, somewhat prescriptive accounts. An interdisciplinary approach gives fair coverage of the historical, political and cultural issues involved in elections and election observation in Africa. Key examples of the interface between election observation and democratization processes in various important countries in Africa are presented, linking an analysis of policies and practice. The book contributes to topical debates on the dilemmas and challenges of 'good governance' and on the varieties of democracy as a global phenomenon.
Author: International Association for Analog Computation
Publisher:
ISBN:
Category : Electronic analog computers
Languages : en
Pages : 810
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Book Description
Author: Leslie Rainer
Publisher: Getty Publications
ISBN: 1606060430
Category : Architecture
Languages : fr
Pages : 438
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Book Description
Earthen architecture constitutes one of the most diverse forms of cultural heritage and one of the most challenging to preserve. It dates from all periods and is found on all continents but is particularly prevalent in Africa, where it has been a building tradition for centuries. Sites range from ancestral cities in Mali to the palaces of Abomey in Benin, from monuments and mosques in Iran and Buddhist temples on the Silk Road to Spanish missions in California. This volume's sixty-four papers address such themes as earthen architecture in Mali, the conservation of living sites, local knowledge systems and intangible aspects, seismic and other natural forces, the conservation and management of archaeological sites, research advances, and training.
Author: Fredric M. Jablin
Publisher: SAGE Publications, Incorporated
ISBN: 9780803923874
Category : Language Arts & Disciplines
Languages : en
Pages : 792
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Book Description
Organizational communication is a rapidly evolving field of communication studies. How has it developed over the last decade? How do the pioneers of the discipline see its future? The Handbook of Organizational Communication brings you up-to-date with the latest advances in this exciting field. Leading scholars review and synthesize important developments in research and theory. They also suggest future directions for research.
Author: Souter, David
Publisher: UNESCO Publishing
ISBN: 9231003143
Category : Human rights
Languages : en
Pages : 197
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Book Description
Author: Guillaume Lecointre
Publisher: Harvard University Press
ISBN: 9780674021839
Category : Science
Languages : en
Pages : 568
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Book Description
Did you know that you are more closely related to a mushroom than to a daisy? That dinosaurs are still among us? That the terms "fish" and "invertebrates" do not indicate scientific groupings? All this is the result of major changes in classification. This book diagrams the tree of life according to the most recent methods of this system.
Author: Pascal Le Masson
Publisher: Springer
ISBN: 3319502778
Category : Technology & Engineering
Languages : en
Pages : 390
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Book Description
This textbook presents the core of recent advances in design theory and its implications for design methods and design organization. Providing a unified perspective on different design methods and approaches, from the most classic (systematic design) to the most advanced (C-K theory), it offers a unique and integrated presentation of traditional and contemporary theories in the field. Examining the principles of each theory, this guide utilizes numerous real life industrial applications, with clear links to engineering design, industrial design, management, economics, psychology and creativity. Containing a section of exams with detailed answers, it is useful for courses in design theory, engineering design and advanced innovation management. "Students and professors, practitioners and researchers in diverse disciplines, interested in design, will find in this book a rich and vital source for studying fundamental design methods and tools as well as the most advanced design theories that work in practice". Professor Yoram Reich, Tel Aviv University, Editor-in-Chief, Research In Engineering Design. "Twenty years of research in design theory and engineering have shown that training in creative design is indeed possible and offers remarkably operational methods - this book is indispensable for all leaders and practitioners who wish to strengthen theinnovation capacity of their company." Pascal Daloz, Executive Vice President, Dassault Systèmes
Author: Ahmed Belasri
Publisher: Springer Nature
ISBN: 9811554447
Category : Technology & Engineering
Languages : en
Pages : 659
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Book Description
This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
