Author: Michel Sotom
Publisher:
ISBN:
Category :
Languages : fr
Pages : 160
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Book Description
PROCEDE DE CARACTERISATION DE L'OUVERTURE ET DE LA TRANSMITTANCE ANGULAIRES BASE SUR L'INJECTION D'UN FAISCEAU LASER SOUS INCIDENCE BIEN DETERMINEE DANS UNE FIBRE FIXE PAR L'INTERMEDIAIRE D'UN JEU DE MIROIR TOURNANTS GERE PAR UN MICROORDINATEUR. SONT CARACTERISEES DES FIBRES MULTIMODES DONT UN DES CONSTITUANTS AU MOINS EST UN VERRE ORGANIQUE. LE PROCEDE PERMET D'ITENTIFIER LES DIFFERENTS MECANISMES RESPONSABLES DES PERTES DE PUISSANCE ET LE ROLE DE L'ABSORBANCE DE LA GAINE. APPLICATION A L'ETUDE DES PROPRIETES DE TRANSMISSION DE FIBRES SOUMISES A DES CONTRAINTES THERMIQUES.
Author: L.. JEUNHOMME
Publisher:
ISBN:
Category :
Languages : fr
Pages : 49
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Book Description
ETUDE EXPERIMENTALE DU COUPLAGE DE MODES INDUIT DANS DES FIBRES OPTIQUES MULTIMODES PAR DES MICROCOURBURES DE L'AXE DE LA FIBRE. DE TRES FAIBLES DEFAUTS EXERCENT UNE INFLUENCE IMPORTANTE SUR LA REPARTITION D'ENERGIE SUIVANT LES MODES. ETABLISSEMENT D'UNE EQUATION DE PROPAGATION TENANT COMPTE DE CES COUPLAGES ET RESOLUTION DE CETTE EQUATION.
Author: Xavier Begaud
Publisher: John Wiley & Sons
ISBN: 1118586573
Category : Technology & Engineering
Languages : en
Pages : 217
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Book Description
Ultra Wide Band Technology (UWB) has reached a level of maturity that allows us to offer wireless links with either high or low data rates. These wireless links are frequently associated with a location capability for which ultimate accuracy varies with the inverse of the frequency bandwidth. Using time or frequency domain waveforms, they are currently the subject of international standards facilitating their commercial implementation. Drawing up a complete state of the art, Ultra Wide Band Antennas is aimed at students, engineers and researchers and presents a summary of internationally recognized studies.
Author: Alain Sibille
Publisher: Academic Press
ISBN: 0123821959
Category : Technology & Engineering
Languages : es
Pages : 385
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Book Description
Foreword from Arogyaswami Paulraj, Professor (Emeritus), Stanford University (USA) - The first book to show how MIMO principles can be implemented in today's mobile broadband networks and components - Explains and solves some of the practical difficulties that arise in designing and implementing MIMO systems - Both theory and implementation sections are written in the context of the most recent standards: IEEE 802.11n (WiFi); IEEE 802.16 (WIMAX); 4G networks (3GPP/3GPP2, LTE)
Author:
Publisher:
ISBN:
Category : High technology
Languages : en
Pages : 160
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Book Description
Author: Roberto Verdone
Publisher: Springer Science & Business Media
ISBN: 144712314X
Category : Computers
Languages : en
Pages : 696
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Book Description
Reporting the findings of COST 2100, a major European intergovernmental project, this volume offers system designers a good source of guidelines based on channel characterization and measurement-based modeling, as well as worthwhile ideas for future research.
Author: Michael Möser
Publisher: Springer Science & Business Media
ISBN: 3540927239
Category : Technology & Engineering
Languages : en
Pages : 540
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Book Description
Suitable for both individual and group learning, Engineering Acoustics focuses on basic concepts and methods to make our environments quieter, both in buildings and in the open air. The author’s tutorial style derives from the conviction that understanding is enhanced when the necessity behind the particular teaching approach is made clear. He also combines mathematical derivations and formulas with extensive explanations and examples to deepen comprehension. Fundamental chapters on the physics and perception of sound precede those on noise reduction (elastic isolation) methods. The last chapter deals with microphones and loudspeakers. Moeser includes major discoveries by Lothar Cremer, including the optimum impedance for mufflers and the coincidence effect behind structural acoustic transmission. The appendix gives a short introduction on the use of complex amplitudes in acoustics.
Author: Andrew F. Monk
Publisher: Academic Press
ISBN: 1483276759
Category : Reference
Languages : en
Pages : 312
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Book Description
Fundamentals of Human-Computer Interaction aims to sensitize the systems designer to the problems faced by the user of an interactive system. The book grew out of a course entitled ""The User Interface: Human Factors for Computer-based Systems"" which has been run annually at the University of York since 1981. This course has been attended primarily by systems managers from the computer industry. The book is organized into three parts. Part One focuses on the user as processor of information with studies on visual perception; extracting information from printed and electronically presented text; and human memory. Part Two on the use of behavioral data includes studies on how and when to collect behavioral data; and statistical evaluation of behavioral data. Part Three deals with user interfaces. The chapters in this section cover topics such as work station design, user interface design, and speech communication. It is hoped that this book will be read by systems engineers and managers concerned with the design of interactive systems as well as graduate and undergraduate computer science students. The book is also suitable as a tutorial text for certain courses for students of Psychology and Ergonomics.
