Download or read book SIMULATION NUMERIQUE BIDIMENSIONNELLE DES DIODES LASERS EN REGIME STATIQUE written by Grégoire Debaisieux and published by . This book was released on 1997 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL PORTE SUR L'ETUDE ET LA REALISATION DE LOGICIELS DE SIMULATION POUR LES LASERS A SEMI-CONDUCTEURS, DE TYPE FABRY-PEROT, EN REGIME STATIQUE. LES LOGICIELS DEVELOPPES PERMETTENT LA SIMULATION BIDIMENSIONNELLE DES LASERS MASSIFS DANS UN PLAN TRANSVERSE A LA DIRECTION DE PROPAGATION DE LA LUMIERE ET LA SIMULATION UNIDIMENSIONNELLE DES LASERS A PUITS QUANTIQUES DANS LA DIRECTION PERPENDICULAIRE AU PLAN DES PUITS QUANTIQUES. LA COMPLEXITE DU FONCTIONNEMENT DES LASERS A SEMI-CONDUCTEUR NOUS A CONDUIT A INTRODUIRE DE NOMBREUX EFFETS PHYSIQUES DANS LE MODELE. AINSI, NOUS FAISONS APPEL A LA PHYSIQUE DES SEMI-CONDUCTEURS MASSIFS ET DES PUITS QUANTIQUES, A LA DESCRIPTION CLASSIQUE DU TRANSPORT DES PORTEURS A TRAVERS LES HETEROJONCTIONS ET A L'OPTIQUE GUIDEE. LES EQUATIONS ELECTRIQUES ET OPTIQUES NECESSAIRES A LA DESCRIPTION DU FONCTIONNEMENT DU LASER SONT RESOLUES DE FACON COUPLEE. CECI CONDUIT A L'OBTENTION DE L'ENSEMBLE DES GRANDEURS PHYSIQUES DE MANIERE AUTO-COHERENTE POUR UN POINT DE POLARISATION DONNE. NOUS AVONS EGALEMENT MIS EN OEUVRE DES OUTILS PERMETTANT D'EVALUER CERTAINS PARAMETRES DE LA SIMULATION TELS QUE LE COEFFICIENT DE REFLEXION SUR LES FACETTES DU LASER OU LE GAIN MATERIAU DANS LES LASERS MASSIFS ET LES LASERS A PUITS QUANTIQUES. LES OUTILS DE SIMULATION DEVELOPPES ONT FAIT L'OBJET DE VALIDATION A PARTIR DE RESULTATS EXPERIMENTAUX, SUR DES STRUCTURES TELLES QUE LES LASERS A RUBAN ENTERRE OU LES AMPLIFICATEURS OPTIQUES POUR LA VALIDATION DU MODELE DE GAIN OPTIQUE. NOUS OBTENONS UN BON ACCORD ENTRE LA SIMULATION ET L'EXPERIENCE COMPTE TENU DE L'INCERTITUDE SUR LES PARAMETRES MATERIAUX INJECTES DANS LE MODELE. LES PROBLEMES DE LA SIMULATION BIDIMENSIONNELLE DES LASERS A PUITS QUANTIQUES AINSI QUE CEUX LIES AUX LIMITES DU MODELE DE TRANSPORT ELECTRONIQUE DE DERIVE-DIFFUSION DANS LES PUITS QUANTIQUES SONT ETUDIES.

Download or read book CONTRIBUTION A LA MODELISATION ET A L ANALYSE DES DIODES LASER A 1 3 MICRON written by Alain Changenet and published by . This book was released on 1988 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: A PARTIR DE LA SIMULATION NUMERIQUE DES MECANISMES DE CONDUCTION D'UN DIODE LASER, L'INFLUENCE DES PRINCIPAUX TERMES DE RECOMBINAISONS SUR LA CARACTERISTIQUE COURANT-TENSION D'UN LASER EST ETUDIE. CETTE ETUDE PERMET DE DEFINIR UN MODELE SIMPLIFIE, NE COMPRENANT QUE 3 PARAMETRES INDEPENDANTS, CAPABLE DE DECRIRE LA CARACTERISTIQUE ELECTRIQUE. IL EST MONTRE COMMENT, A PARTIR DE MESURES EXPERIMENTALES, IL EST POSSIBLE DE TROUVER LA VALEUR DES PARAMETRES DU MODELE. LE MODELE ELECTRIQUE EST ENSUITE COMPLETE PAR L'EQUATION DE GAIN DE LA CAVITE POUR PREDIRE LE COMPORTEMENT OPTIQUE AU SEUIL. LES COURANTS DE FUITE SONT PRIS EN COMPTE POUR FAIRE L'ANALYSE COMPLETE D'UNE STRUCTURE PARTICULIERE. DES RESULTATS DE VIEILLISSEMENT CONCERNANT UNE FAMILLE DE LASERS SONT DONNES

Download or read book Annales des t l communications written by and published by . This book was released on 1997 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Theory of Propellers written by Theodore Theodorsen and published by . This book was released on 1944 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: A technical method is given for calculating the axial interference velocity of a propeller. The method involves the use of certain weight functions P, Q, and F. Numerical values for the weight functions are given for two-blade, three-blade, and six-blade propellers.

Download or read book Space Systems as Contributors to the NATO Defence Mission written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Mission Systems Panel. Symposium and published by . This book was released on 1997 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Theory of Ionization of Gases by Collision written by Sir John Townsend and published by . This book was released on 1910 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Hydroinformatics written by Philippe Gourbesville and published by Springer. This book was released on 2015-08-21 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of extended papers based on presentations given during the SIMHYDRO 2014 conference, held in Sophia Antipolis in June 2014. It focuses on the modeling and simulation of fast hydraulic transients, on 3D modeling, and on uncertainties and multiphase flows. The book explores both the limitations and performance of current models and presents the latest developments based on new numerical schemes, high-performance computing, multiphysics and multiscale methods, and better interaction with field or scale model data. It addresses the interests of practitioners, stakeholders, researchers and engineers active in this field.

Download or read book Genmix written by D Brian Spalding and published by Elsevier. This book was released on 2014-05-18 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genmix: A General Computer Program for Two-dimensional Parabolic Phenomena explains a computer program called GENMIX. The main intention of the program is to be used as a tool of instructions. The name of the program is a mixture of two considerations: its generality and its concern for mixing processes. The book aims to help the potential user to understand the physical and mathematical basis of the topic computer program. It is also the aim of the book to make the program applicable to practical problems. The book is arranged in such a way as to parallel a course of lectures and associated computer-workshop sessions wherein the student is allowed to do some elementary computations as soon as he has gained some knowledge of the method. The book contains the mathematical, physical, and computer-coding aspects of the program. Concepts such as the boundary layer, two-dimensional, and steady- flow are defined and discussed in depth. The text will be a useful tool for computer instructors and students.

Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.

Download or read book Granular Materials written by S Joseph Antony and published by Royal Society of Chemistry. This book was released on 2007-10-31 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: Granular materials play an important role in many industries. Continuous ingenuity and advancement in these industries necessitates the ability to predict the fundamental behaviour of granular materials under different working environments. With contributions from international experts in the field Granular Materials; Fundamentals and Applications details recent advances made in theoretical computational and experimental approaches in understanding the behaviour of granular materials including industrial applications. Topics covered include: * key features of granular plasticity * high temperature particle interactions * influence of polymers on particulate dispersion stability: scanning probe microscopy investigations * in-process measurement of particulate systems Presented by world renowned researchers this book will be welcomed by scientists and engineers working across a wide spectrum of engineering disciplines.

Download or read book Aircraft Fire Safety written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Propulsion and Energetics Panel. Symposium and published by . This book was released on 1989 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Conference Proceedings contains 38 papers presented at the Propulsion and Energetics Panel 73rd Symposium on 'Aircraft Fire Safety' which was held 22 - 26 May 1989 in Sintra, Portugal. The Symposium was arranged in the following sessions: Review of Fire-Related Aircraft Accidents (3); Fire Safety Standards and Research Programmes (6); Aircraft Internal Fires (9); Aircraft External Fires (2); Fire Safety of Military Weapon Systems (3); Fire Hardening by Advanced Materials and Structural Design (8); Passenger Behaviour in Emergency Situations (3); and Passenger Protective Equipment (4). The Technical Evaluation Report and and Addendum are included at the beginning of the Proceedings. Questions and answers of the discussions follow each paper. The last AGARD review on the subject took place in a Specialists' Meeting in 1975, followed by a Working Group Report in 1979 and Lecture Series in 1982. The purpose of the Symposium was a review of the present state-of-the-art and of the last improvements. Although the safety standards in aviation are already very high, there is still room for improvements. They are listed in the Conclusions and Recommendations of the Technical Evaluation Report and in the Addendum.

Download or read book Heat and Mass Transfer in Boundary Layers written by Suhas V. Patankar and published by . This book was released on 1970 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Applied Reactor Physics written by Alain Hébert and published by Presses inter Polytechnique. This book was released on 2009 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Auxiliary power systems papers presented at the Propulsion and Energetics Panel 61st B specialists meeting held in Copenhagen Denmark 30 31 May 1983 written by AGARD. and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Frequency and Time written by P. Kartaschoff and published by . This book was released on 1978 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ZnO Thin Films written by Paolo Mele and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.

Download or read book Transport Theory written by James J. Duderstadt and published by John Wiley & Sons. This book was released on 1979 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: Problems after each chapter