Download or read book Les interactions non lin aires d ondes acoustiques written by Pierre yves Hénnion and published by . This book was released on 1984 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interaction non lin aire faible entre deux ondes acoustiques written by Bernard Fromont and published by . This book was released on 1976 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Après un aperçu général sur l'acoustique non linéaire, on étudie une antenne paramétrique de réception. On analyse le rapport signal/bruit en sortie d'une telle antenne, et un dispositif de rebouclage qui permet d'améliorer ce rapport est décrit et expérimenté. On a obtenu également un certain nombre de données concernant le coefficient de non-linéarité de matériaux couramment utilisés en acoustique.

Download or read book Propagation non lin aire des ondes acoustiques dans les solides written by Michel Planat and published by . This book was released on 1984 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: NOUS ETUDIONS LA PROPAGATION NON LINEAIRE D'ONDES ACOUSTIQUES DANS LES MILIEUX CRISTALLINS PIEZOELECTRIQUES. L'EQUATION D'ONDE OBTENUE EST RESOLUE PAR UTILISATION DE METHODES D'APPROXIMATIONS SUCCESSIVES UNIFORMEMENT VALABLES QUELLE QUE SOIT LA DISTANCE A LA SOURCE D'EXCITATION, AUSSI BIEN EN ONDES DE VOLUME QU'EN ONDES DE SURFACE. LES PHENOMENES D'ANISOCHRONISME DANS LES RESONATEURS, D'INTERMODULATION DANS LA BANDE PASSANTE DES FILTRES ET DE CONVOLUTION DANS LES DISPOSITIFS DE TRAITEMENT DE SIGNAL SONT ANALYSES DU DOUBLE POINT DE VUE THEORIQUE ET EXPERIMENTAL

Download or read book Diffusion multiple et non lin aire des ondes acoustiques dans les milieux bulleux written by Olivier Lombard and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diffusion multiple et non linéarité sont deux phénomènes antagonistes en acoustique, ilest ainsi rare d'observer un couplage de ces deux effets. En acoustique, les effets non linéaires sontimportants souvent lorsqu'ils sont cumulatifs, or la diffusion multiple modifie la relation de dispersiondu milieu et empêche ainsi ce caractère cumulatif. Les bulles sont connues pour avoir un comportementnon linéaire. Elles sont aussi de très bons diffuseurs avec une section efficace de diffusion qui est trèsgrande devant leur section efficace géométrique notamment à leur fréquence de résonance. Les milieuxbulleux semblent ainsi de bons candidats pour observer de la diffusion multiple en régime non linéaire.Trois régimes sont observables dans un milieu bulleux : un régime basse fréquence auquel les effetsnon linéaires sont importants et cumulatifs mais sans diffusion multiple, un régime à la fréquence derésonance des bulles auquel les effets non linéaires ne sont pas cumulatifs mais restent quand mêmeélevés tout comme la diffusion bien qu'atténuée par l'absorption du milieu, et enfin un régime hautefréquence pour lequel les effets de diffusion multiple sont importants mais les effets non linéaires sontabsents. Les travaux décrits dans cette thèse ont porté sur la modélisation et l'expérimentation desrégimes à la fréquence de résonance et à haute fréquence. A haute fréquence, l'observation d'une codadans les milieux bulleux est modélisée par une équation de diffusion. A la fréquence de résonance, lamodélisation, validée par les expériences, conduit ensuite à des applications qui sont : le doubleur defréquence, la diode acoustique et le miroir à conjugaison de phase.

Download or read book Interaction d ondes simples pour des equations completement non lineaires written by Serge Alinhac and published by . This book was released on 1986 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acoustique non lin aire et diffusion multiple dans les suspensions de particules rigides written by Michaël Baudoin and published by . This book was released on 2007 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: LorsquÕune onde acoustique se propage dans une suspension, diffŽrents phŽnom nes physiques peuvent aboutir ˆ lÕattŽnuation et la dispersion de lÕonde selon la nature des particules et la gamme de frŽquences considŽrŽe. Une bonne comprŽhension des mŽcanismes de diffusion peut alors permettre de prŽdire son Žvolution, voire m me de caractŽriser la suspension par rŽsolution du probl me inverse. Ce travail aborde la propagation linŽaire et non linŽaire des ondes acoustiques dans des suspensions de Òparticules rigidesÓ de taille petite devant la longueur d'onde. Une premi re partie est consacrŽe ˆ lÕŽtude thŽorique, numŽrique et expŽrimentale de lÕabsorption dÕune onde de choc acoustique en prŽsence de petits diffuseurs. Une deuxi me partie traite la propagation dans les hydrosols concentrŽs, via un mod le de milieu effectif auto-consistant qui permet de tenir compte des interactions entre particules voisines.

Download or read book Interaction d une onde acoustique plane avec un r seau plan simplement ou doublement p riodique par la technique des quations int grales discr tis es written by Patrick Vidoret and published by . This book was released on 1990 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: LES RESEAUX D'OBSTACLES REPARTIS PERIODIQUEMENT DANS UN PLAN ET ENROBES DANS UNE MATRICE VISCOELASTIQUE POUR FORMER UNE PLAQUE SONT UTILISES COMME BARRIERES ACOUSTIQUES SOUS LE VOCABLE ALBERICH LORSQUE LES INCLUSIONS SONT PLEINES D'AIR. LA PERIODICITE PEUT ETRE SIMPLE COMME DANS LE CAS DU RESEAU DE CYLINDRES PARALLELES, OU DOUBLE. LE BUT DE CETTE ETUDE EST DE DETERMINER LES COEFFICIENTS DE REFLEXION ET DE TRANSMISSION D'UN ALBERICH LORSQU'IL EST SOUMIS A UNE ONDE PLANE HARMONIQUE. TOUS LES MILIEUX SONT SUPPOSES FLUIDES. LA TECHNIQUE EMPLOYEE CONSISTE A UTILISER A L'EXTERIEUR DE LA PLAQUE UN DEVELOPPEMENT EN ONDES PLANES DONT LES COEFFICIENTS SONT LES VALEURS A DETERMINER. A L'INTERIEUR DE LA PLAQUE, LA PERIODICITE PERMET DE LIMITER L'ETUDE A UN DOMAINE ELEMENTAIRE NE CONTENANT QU'UNE SEULE INCLUSION ET QUI CONSTITUE LE MOTIF DU RESEAU. UNE REPRESENTATION INTEGRALE DE LA PRESSION EST UTILISEE DANS LA PLAQUE ET DANS L'INCLUSION. LE PROBLEME EST MIS EN EQUATION EN ECRIVANT DES RELATIONS DE CONTINUITE SUR LES DIFFERENTES FRONTIERES DU DOMAINE ELEMENTAIRE. ENFIN, UNE RESOLUTION NUMERIQUE EST PROPOSEE, NECESSITANT LA TRONCATURE DES DEVELOPPEMENTS EN ONDES PLANES ET LA DISCRETISATION DES FRONTIERES. CE PROCEDE LIMITE LA VALIDITE DES RESULTATS AUX BASSES FREQUENCES. L'APPLICATION DE CETTE TECHNIQUE AU CAS SIMPLEMENT PERIODIQUE A ETE REALISEE POUR UN RESEAU DE CYLINDRES CIRCULAIRES. LES RESULTATS OBTENUS SONT EN BON ACCORD AVEC CEUX FOURNIS PAR DES METHODES ANALYTIQUES ET AVEC DES VALEURS EXPERIMENTALES. LE CAS DU RESEAU DE SPHERES DOUBLEMENT PERIODIQUE A EGALEMENT ETE ETUDIE ET LES RESULTATS ONT ETE COMPARES AVEC DES VALEURS EXPERIMENTALES, AUCUN RESULTAT ISSU DE MODELES ANALYTIQUES N'AYANT ETE TROUVE PAR AILLEURS. L'ACCORD ENTRE CES DEUX TYPES DE RESULTATS EST D'AUTANT MEILLEUR QUE LES MATERIAUX EMPLOYES PEUVENT ETRE ASSIMILES A DES FLUIDES

Download or read book Current Programs written by and published by . This book was released on 1975 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamique Non lin aire Et Le Chaos written by and published by . This book was released on 1993 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Quantum Mechanics Volume 3 written by Claude Cohen-Tannoudji and published by John Wiley & Sons. This book was released on 2019-12-16 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: This new, third volume of Cohen-Tannoudji's groundbreaking textbook covers advanced topics of quantum mechanics such as uncorrelated and correlated identical particles, the quantum theory of the electromagnetic field, absorption, emission and scattering of photons by atoms, and quantum entanglement. Written in a didactically unrivalled manner, the textbook explains the fundamental concepts in seven chapters which are elaborated in accompanying complements that provide more detailed discussions, examples and applications. * Completing the success story: the third and final volume of the quantum mechanics textbook written by 1997 Nobel laureate Claude Cohen-Tannoudji and his colleagues Bernard Diu and Franck Laloë * As easily comprehensible as possible: all steps of the physical background and its mathematical representation are spelled out explicitly * Comprehensive: in addition to the fundamentals themselves, the books comes with a wealth of elaborately explained examples and applications Claude Cohen-Tannoudji was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris where he also studied and received his PhD in 1962. In 1973 he became Professor of atomic and molecular physics at the Collège des France. His main research interests were optical pumping, quantum optics and atom-photon interactions. In 1997, Claude Cohen-Tannoudji, together with Steven Chu and William D. Phillips, was awarded the Nobel Prize in Physics for his research on laser cooling and trapping of neutral atoms. Bernard Diu was Professor at the Denis Diderot University (Paris VII). He was engaged in research at the Laboratory of Theoretical Physics and High Energy where his focus was on strong interactions physics and statistical mechanics. Franck Laloë was a researcher at the Kastler-Brossel laboratory of the Ecole Normale Supérieure in Paris. His first assignment was with the University of Paris VI before he was appointed to the CNRS, the French National Research Center. His research was focused on optical pumping, statistical mechanics of quantum gases, musical acoustics and the foundations of quantum mechanics.

Download or read book Practical Sonochemistry written by Timothy J Mason and published by Woodhead Publishing. This book was released on 2002-11-01 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: This updated version of Practical Sonochemistry for advanced students and teachers in chemistry and chemical engineering conveys the increasing growth in applications and equipment to power ultrasound. Equipment now on the market offers a wider range of frequencies with more reproducible experimentation and a variety of scale-up systems. The book provides detailed descriptions of newer ultrasonic equipment and its applications, and practical laboratory uses of ultrasound technology for industrial scale performance.Modern exercises familiarise readers with recent sonochemical operations. The book also includes methods for estimating ultrasonic energy entering the system (dosimetry), which will standardise sonochemical methodology and enable practitioners to reproduce results from other laboratories. - Conveys the increasing growth in applications and equipment to power ultrasound - Provides detailed descriptions of new ultrasonic equipment and its applications and practical laboratory uses of ultrasound technology for industrial scale performance - Includes methods for estimating ultrasonic energy entering the system (dosimetry), which will standardise sonochemical methodology and enable practitioners to reproduce results from other laboratories

Download or read book Boundary Element Methods for Soil Structure Interaction written by W.S. Hall and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: W S HALL School of Computing and Mathematics, University of Teesside, Middlesbrough, TS1 3BA UK G OLIVETO Division of Structural Engineering, Department of Civil and Environmental Engineering, University of Catania, Viale A. Doria 6, 95125 Catania, Italy Soil-Structure Interaction is a challenging multidisciplinary subject which covers several areas of Civil Engineering. Virtually every construction is connected to the ground and the interaction between the artefact and the foundation medium may affect considerably both the superstructure and the foundation soil. The Soil-Structure Interaction problem has become an important feature of Structural Engineering with the advent of massive constructions on soft soils such as nuclear power plants, concrete and earth dams. Buildings, bridges, tunnels and underground structures may also require particular attention to be given to the problems of Soil-Structure Interaction. Dynamic Soil-Structure Interaction is prominent in Earthquake Engineering problems. The complexity of the problem, due also to its multidisciplinary nature and to the fact of having to consider bounded and unbounded media of different mechanical characteristics, requires a numerical treatment for any application of engineering significance. The Boundary Element Method appears to be well suited to solve problems of Soil- Structure Interaction through its ability to discretize only the boundaries of complex and often unbounded geometries. Non-linear problems which often arise in Soil-Structure Interaction may also be treated advantageously by a judicious mix of Boundary and Finite Element discretizations.

Download or read book Dynamic Soil structure Interaction written by John P. Wolf and published by Prentice Hall. This book was released on 1985 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Philosophy in a Time of Terror written by Giovanna Borradori and published by University of Chicago Press. This book was released on 2013-05-28 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: The idea for Philosophy in a Time of Terror was born hours after the attacks on 9/11 and was realized just weeks later when Giovanna Borradori sat down with Jürgen Habermas and Jacques Derrida in New York City, in separate interviews, to evaluate the significance of the most destructive terrorist act ever perpetrated. This book marks an unprecedented encounter between two of the most influential thinkers of our age as here, for the first time, Habermas and Derrida overcome their mutual antagonism and agree to appear side by side. As the two philosophers disassemble and reassemble what we think we know about terrorism, they break from the familiar social and political rhetoric increasingly polarized between good and evil. In this process, we watch two of the greatest intellects of the century at work.

Download or read book Electric Sound written by Joel Chadabe and published by Pearson. This book was released on 1997 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: The author covers the development of the electronic musical instrument from Thaddeus Cahill's Telharmonium at the turn of the last century to the MIDI synthesizers of the 1990s. --book cover.

Download or read book Current List of Medical Literature written by and published by . This book was released on 1955 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes section, "Recent book acquisitions" (varies: Recent United States publications) formerly published separately by the U.S. Army Medical Library.

Download or read book Experimental Chaos written by Stefano Boccaletti and published by A I P Press. This book was released on 2004-12-14 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 8th Experimental Chaos Conference again demonstrated the broad spectrum of areas where nonlinear dynamics plays an important role, such as circuits, hydrodynamics, optics, chemistry, fracture dynamics, neuroscience, and cognitive science. Additional contributions outline the trends for development and application of concepts and techniques of nonlinear dynamics.