Download or read book Optimisation d une cha ne de traitement du signal d un sonar written by Dominique PERCHERON and published by . This book was released on 1986 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book OPTIMISATION PAR TRAITEMENT DE SIGNAL ET AUTOMATIQUE DE LA PURETE SPECTRALE DE FORTS SIGNAUX D EMISSION APPLICATION AUX EMISSIONS SONAR written by NORBERT.. ROSSELLO and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: LORS D'UNE EMISSION SONAR, LES VARIATIONS DE L'ANTENNE ACOUSTIQUE DISTORDENT LES SIGNAUX D'EMISSION. CETTE ETUDE PRESENTE UNE CORRECTION PERMETTANT DE RESOUDRE CE PROBLEME. ELLE CONSISTE EN UNE REGULATION EN BOUCLE FERMEE DU FONCTIONNEMENT DE LA CHAINE D'EMISSION SONAR. C'EST LA CORRECTION PAR ANALYSE SPECTRALE ET BOUCLAGE. LA CORRECTION SE REALISE COMME SUIT: DANS UN PREMIER TEMPS L'ANALYSE SPECTRALE DU SIGNAL D'EMISSION PERMET DE CONNAITRE SA REPARTITION FREQUENTIELLE, ET D'ESTIMER SA PURETE SPECTRALE PAR RAPPORT A UN CRITERE FIXE. DE PAR SES QUALITES DEVELOPPEES DANS CETTE ETUDE, NOUS PROPOSONS L'ANALYSE SPECTRALE INSPIREE DE PRONY. LA DISTORSION DU SIGNAL D'EMISSION EST ALORS CONNUE. DANS UN DEUXIEME TEMPS NOUS ADRESSONS A LA COMMANDE LE MOYEN DE CORRIGER CETTE DISTORSION. CECI NOUS IMPOSE DE RESOUDRE UN SYSTEME NON LINEAIRE AVEC CONTRAINTES. POUR CETTE RESOLUTION, DANS L'ENSEMBLE DES ALGORITHMES PRESENTES, NOUS PROPOSONS CELUI DE NEWTON-RAPHSON A PAS OPTIMISE. LA CORRECTION EST ALORS TOTALEMENT DEFINIE. DES SIMULATIONS EFFECTUEES POUR DIFFERENTES VARIATIONS DE LA CHARGE INTRODUISANT DE LA DISTORSION HARMONIQUE, AINSI QUE POUR DES IMPERFECTIONS DANS LA CHAINE D'EMISSION, ONT PARFAITEMENT VALIDE LE DEVELOPPEMENT THEORIQUE DE CETTE ETUDE
Download or read book Optimisation par traitement de signal et automatique de la purete spectrale de forts signaux d emission Application aux emissions sonar written by Norbert Rossello and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conception et r alisation d une cha ne modulaire d acquisition et de traitement du signal application au sonar large bande written by Bertrand Danet and published by . This book was released on 1995 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE ABORDE LES PROBLEMES QUI SONT POSES PAR LA CONCEPTION DES INSTRUMENTATIONS D'ACQUISITIONS NUMERIQUES MODERNES. LES DIFFICULTES MAJEURES SONT LA CONSEQUENCE DIRECTE DE L'APPARITION DE MICROPROCESSEURS ET DE CIRCUITS D'ACQUISITION OU DE GENERATION DE SIGNAUX DE PLUS EN PLUS PUISSANTS ET COMPLEXES. IL EST DONC DEVENU INDISPENSABLE DE RATIONALISER CETTE CONCEPTION. POUR CELA IL EST PROPOSE UN SCHEMA DIRECTEUR QUI FRACTIONNE CES INSTRUMENTATIONS EN SOUS-MODULES PLUS FACILEMENT REALISABLES ET SURTOUT REUTILISABLES. L'ACCENT EST PARTICULIEREMENT MIS SUR LE MODULE D'ACQUISITION CAR IL EST LE PLUS SPECIFIQUE. UNE STRUCTURE THEORIQUE EST PROPOSEE POUR DECRIRE CES FONCTIONNALITES. UN EXEMPLE DE CHAINE D'ACQUISITION PRENANT LA FORME DE CARTES AU FORMAT NUBUS ET COMPORTANT DES PROCESSEURS DE TRAITEMENT DU SIGNAL ET DES PROCESSEURS CLASSIQUES A ETE REALISE, AVEC UNE BIBLIOTHEQUE DE LOGICIELS ET DE GESTIONNAIRES DE PERIPHERIQUES. POUR VERIFIER LA VALIDITE ET LA SOUPLESSE DE NOTRE OUTIL D'ACQUISITION NOUS L'AVONS UTILISE POUR REALISER UN SONAR LARGE BANDE. CE SONAR TIRE SON ORIGINALITE ET SES PERFORMANCES DE SON PRINCIPE, IL UTILISE UNE SEQUENCE D'EMISSION BINAIRE PSEUDOALEATOIRE ET UNE AUTOCORRELATION DE CELLE-CI AVEC LE SIGNAL DE RETOUR. LA REPONSE IMPULSIONNELLE OBTENUE PERMET DE DEFINIR ET DE CLASSIFIER LA NATURE DES FONDS LACUSTRES. NOTRE INSTRUMENTATION Y TROUVE UNE APPLICATION DE CHOIX, SES CAPACITES DE CALCUL PERMETTANT DE REALISER LES AUTOCORRELATIONS PAR UNE TRANSFORMEE DE HADAMARD RAPIDE EN TEMPS REEL. DES MESURES EFFECTUEES SUR DIFFERENTS TYPES DE FONDS SONT PRESENTES ET MONTRENT LA VALIDITE DE NOTRE APPROCHE
Download or read book Conception et realisation d une chaine modulaire d acquisition et de traitement du signal application au sonar large bande written by Bertrand Danet and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modelling the Wireless Propagation Channel written by Fernando P¿rez Font¿n and published by John Wiley & Sons. This book was released on 2008-09-15 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: A practical tool for propagation channel modeling with MATLAB® simulations. Many books on wireless propagation channel provide a highly theoretical coverage, which for some interested readers, may be difficult to follow. This book takes a very practical approach by introducing the theory in each chapter first, and then carrying out simulations showing how exactly put the theory into practice. The resulting plots are analyzed and commented for clarity, and conclusions are drawn and explained from the obtained results. Key features include: A unique approach to propagation channel modeling with accompanying MATLAB® simulations to demonstrate the theory in practice Contains step by step commentary and analysis of the obtained simulation results in order to provide a comprehensive and structured learning tool Covers a wide range of topics including shadowing effects, coverage and interference, Multipath Narrowband channel, Multipath Wideband channel, propagation in micro and pico-cells, the land mobile satellite (LMS) channel, the directional Multipath channel and MIMO and propagation effects in fixed radio links (terrestrial and satellite) The book comes with an accompanying website that contains the MATLAB® simulations and allows readers to try them out themselves Well suited for lab-use, as reference and as a self-learning tool both for advanced students and professionals Modeling the Wireless Propagation Channel: A simulation approach with MATLAB® will be best suited for postgraduate (Masters and PhD) students and practicing engineers in telecommunications and electrical engineering fields, who are seeking to familiarise themselves with the topic without too many formulas. The book will also be of interest to network engineers, system engineers and researchers
Download or read book Optimisation du rapport signal bruit d une antenne lin aire remorqu e de sonar vis vis des perturbations m caniques longitudinales written by and published by . This book was released on 1996 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 LabView written by Rick Bitter and published by CRC Press. This book was released on 2017-12-19 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Whether seeking deeper knowledge of LabVIEW®’s capabilities or striving to build enhanced VIs, professionals know they will find everything they need in LabVIEW: Advanced Programming Techniques. Now accompanied by LabVIEW 2011, this classic second edition, focusing on LabVIEW 8.0, delves deeply into the classic features that continue to make LabVIEW one of the most popular and widely used graphical programming environments across the engineering community. The authors review the front panel controls, the Standard State Machine template, drivers, the instrument I/O assistant, error handling functions, hyperthreading, and Express VIs. It covers the introduction of the Shared Variables function in LabVIEW 8.0 and explores the LabVIEW project view. The chapter on ActiveX includes discussion of the MicrosoftTM .NET® framework and new examples of programming in LabVIEW using .NET. Numerous illustrations and step-by-step explanations provide hands-on guidance. Reviewing LabVIEW 8.0 and accompanied by the latest software, LabVIEW: Advanced Programming Techniques, Second Edition remains an indispensable resource to help programmers take their LabVIEW knowledge to the next level. Visit the CRC website to download accompanying software.
Download or read book Evolution of Marine Coastal Ecosystems under the Pressure of Global Changes written by Hubert-Jean Ceccaldi and published by Springer Nature. This book was released on 2020-06-15 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coastal and estuarine environments at the interface of terrestrial and marine areas are among the most productive in the world. However, since the beginning of the industrial era, these ecosystems have been subjected to strong anthropogenic pressures intensified from the second half of the 20th century, when there was a marked acceleration in the warming (climate change) of the continents, particularly at high latitudes. Coastal ecosystems are highly vulnerable to alteration of their physical, chemical and biological characteristics (marine intrusion, acidification of marine environments, changes in ecosystems, evolution and artificialization of the coastline, etc.).In contact with heavily populated areas, these environments are often the receptacle of a lot of chemical and biological pollution sources that significantly diminish their resilience. In this context of accelerated evolution and degradation of these areas important for food security of many populations around the world, it is necessary to better identify the factors of pressure and understand, at different scales of observation, their effects and impacts on the biodiversity and on the socio-eco-systems, in order to determine the degree of vulnerability of these coastal ecosystems and the risks they face. A transdisciplinary and integrated approach is required to prevent risks. Within this framework, operational coastal oceanography occupies an important place but also the implementation of a true socio-eco-system approach in order to set up an environmentally friendly development.
Download or read book Artificial Intelligence in Society written by OECD and published by OECD Publishing. This book was released on 2019-06-11 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The artificial intelligence (AI) landscape has evolved significantly from 1950 when Alan Turing first posed the question of whether machines can think. Today, AI is transforming societies and economies. It promises to generate productivity gains, improve well-being and help address global challenges, such as climate change, resource scarcity and health crises.
Download or read book Regional Conference on building a future for sustainable small scale fisheries in the Mediterranean and the Black Sea written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2018-10-31 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: According to the report, the conference focused on the main challenges for the sustainable development of small-scale fisheries, including promoting political commitment and tailored strategies, raising awareness, and sharing knowledge.
Download or read book Strap down Inertial Systems written by and published by . This book was released on 1978 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 2nd Pan African Symposium on the Sustainable Use of Natural Resources in Africa written by Bihini won wa Musiti and published by IUCN. This book was released on 2003 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: This bilingual publication results from a four-day symposium aimed at capturing the general directions and analytical issues that characterize approaches to sustainable use in Africa. The papers included in this work are organized under four major headings: modes of use, devolution, scale issues and external issues. Authors explore these themes through the use of case studies and the description of specific regional experiences. External issues are further explored in a series of commissioned policy papers which have also been included.
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer. This book was released on 1976 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis· seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) *at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac· tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 20 (thesis year 1975) a total of 10,374 theses titles from 28 Canadian and 239 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. The organization of Volume 20 is identical to that of past years. It consists of theses titles arranged by discipline and by university within each discipline.
Download or read book Low Frequency Scattering written by George Dassios and published by Oxford University Press. This book was released on 2000 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scattering theory deals with the interactions of waves with obstacles in their path, and low frequency scattering occurs when the obstacles involved are very small. This book gives an overview of the subject for graduates and researchers, for the first time unifying the theories covering acoustic, electromagnetic and elastic waves.
Download or read book Advances in Pattern Recognition written by Francesc J. Ferri and published by Springer Science & Business Media. This book was released on 2000-08-23 with total page 918 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the joint refereed proceedings of the 8th International Workshop on Structural and Syntactic Pattern Recognition and the 3rd International Workshop on Statistical Techniques in Pattern Recognition, SSPR 2000 and SPR 2000, held in Alicante, Spain in August/September 2000. The 52 revised full papers presented together with five invited papers and 35 posters were carefully reviewed and selected from a total of 130 submissions. The book offers topical sections on hybrid and combined methods, document image analysis, grammar and language methods, structural matching, graph-based methods, shape analysis, clustering and density estimation, object recognition, general methodology, and feature extraction and selection.
