Download or read book D finition analyse et optimisation d un nouveau concept de traitement de carter au moyen d outils num riques written by Laurent Soulat and published by . This book was released on 2010 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pour les turbomachines, les écoulements de jeu entre parties mobiles et fixes peuvent être une source non négligeable de dégradation des performances. Afin de contrer ces écoulements, on fait souvent appel à un traitement de carter. Cette étude est axée sur la définition, l'analyse et l'optimisation d'un nouveau concept de traitement de carter applicable aux turbomachines basse vitesse. Plusieurs outils numériques sont nécessaires pour mener à bien cette étude. Pour la simulation numérique, il convient de disposer de schémas spatiaux adaptés aux maillages non-uniformes, lesquels sont développés ici. L'analyse pratique du traitement de carter fait intervenir une technique de dérivation d'ordre élevé du champ aérodynamique, permettant ensuite une reconstruction rapide des différentes géométries et des champs aérodynamiques associés. Cette technique de dérivation est couplée avec un algorithme génétique afin d'optimiser le traitement de carter. Un outil d'analyse et de visualisation du front de Pareto est alors employé. Le nouveau traitement de carter proposé est un rainurage hélicoïdal du carter. Ce dispositif est utilisé pour réduire le débit de jeu et la giration de l'écoulement de jeu dans le cas de turbomachines présentant une virole. Le traitement de carter est modélisé afin de valider le concept même du rainurage. L'analyse des performances montre une amélioration par rapport à un jeu standard. L'étude du champ aérodynamique associé aux rainures fait ressortir des structures tourbillonnaires complexes et couplées. Une étude paramétrique permet de caractériser finement le comportement du nouveau traitement de carter relativement aux paramètres géométriques définissant la forme des rainures. On valide l'ensemble des variations obtenues avec la méthode de dérivation d'ordre élevé. Le rainurage est alors optimisé en utilisant la base de donnée constituée par ces variations. L'analyse du front de Pareto permet de choisir une configuration optimale de traitement de carter. Cette solution est appliquée à un ventilateur de refroidissement. L'écoulement et les performances de l'ensemble [rotor+traitement de carter] sont étudiés précisément. Dans cette configuration, on améliore remarquablement les caractéristiques de l'écoulement de jeu.
Download or read book Analyse num rique et optimisation written by Grégoire Allaire and published by Editions Ecole Polytechnique. This book was released on 2005 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce livre est issu d'un cours enseigné à l'École Polytechnique dont l'objectif, au delà de la présentation de l'analyse numérique et de l'optimisation, est d'introduire les étudiants au monde de la modélisation mathématique et de la simulation numérique. La modélisation et la simulation ont pris une importance considérable ces dernières décennies dans tous les domaines de la science et des applications industrielles (ou sciences de l'ingénieur). En effet, depuis leur apparition au lendemain de la seconde guerre mondiale les ordinateurs ont profondément transformé les mathématiques en en faisant une science expérimentale : on fait des ± expériences numériques » (des calculs sur ordinateurs) comme d'autres font des expériences physiques. L'analyse numérique est justement la discipline qui conçoit et analyse les méthodes ou algorithmes de calcul. La simulation numérique permet aux mathématiciens de s'attaquer à des problèmes beaucoup plus complexes et concrets qu'auparavant, issus de motivations immédiates industrielles ou scientifiques, auxquels on peut apporter des réponses à la fois qualitatives mais aussi quantitatives : c'est la modélisation mathématique. Remarquons qu'à coté des champs d'applications traditionnels que sont la chimie, le mécanique et la physique se sont ouverts de nouvelles perspectives en biologie, environnement, finance, médecine et sciences sociales. Par ailleurs, l'ingénieur ou le scientifique qui a réussi à simuler numériquement son problème ne s'arrête pas en si bon chemin: il veut ensuite pouvoir intervenir sur certains paramètres pour améliorer ou optimiser le fonctionnement, le rendement, ou la réponse d'un système en maximisant (ou minimisant) des fonctions associées. C'est précisément le but de l'optimisation qui fournit des outils théoriques ou numériques pour ce faire. L'analyse numérique et l'optimisation sont donc deux outils essentiels et complémentaires de la modélisation mathématique. Des travaux pratiques de simulation numérique à l'aide des logiciels Scilab et FreeFem++ accompagnent cet ouvrage et sont disponibles sur le site web http://www.cmap.polytechnique.fr/~allaire/
Download or read book ALGORITHMES ET OUTILS POUR L ANALYSE DES FLUX DE PRODUCTION A L AIDE DU CONCEPT D ORDRE written by JIANDE.. ZHOU and published by . This book was released on 1998 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE ETUDE CONTRIBUE A L'ELABORATION D'UNE METHODE D'ANALYSE DES FLUX DE PRODUCTION EN VUE DE LA RECONCEPTION DU SYSTEME DE PRODUCTION. ELLE TRAITE DIFFERENTES FACETTES DE L'ANALYSE FONCTIONNELLE DES FLUX SELON LE CONCEPT D'ORDRE. UN NOUVEAU PROBLEME D'OPTIMISATION COMBINATOIRE NOMME PRODUCTION LINE FORMATION PROBLEM (PLFP) EST NOTAMMENT ETUDIE. LE PLFP EST LE TRADITIONNEL WEIGHTED FEEDBACK ARC SET PROBLEM (WFASP) AUGMENTE DE CONTRAINTES PARTICULIERES ADAPTEES A L'ANALYSE DES FLUX DE PRODUCTION. LE PREMIER CHAPITRE ETUDIE LA RESOLUTION DU PLFP A PARTIR DU CONCEPT DE VOISINAGE. IL PROPOSE DES ALGORITHMES CAPABLES DANS UN ENVIRONNEMENT BRUITE DE DECELER L'EXISTENCE D'UN FLUX DOMINANT A L'AIDE DES GAMMES DE FABRICATION. UNE METHODE D'ENCADREMENT DE LA MEILLEURE VALEUR DU CRITERE A OPTIMISER EST PROPOSEE POUR LE WFAS. ELLE PERMET D'EVALUER ET DE MONTRER LA QUALITE DES ALGORITHMES PROPOSES. L'ANALYSE DE LA COHERENCE DES CONTRAINTES DU PLFP EST EGALEMENT TRAITEE. LE SECOND CHAPITRE ABORDE LA RESOLUTION DU WFASP PAR DECOMPOSITION RECOMPOSITION. IL S'AGIT DE TRANSFORMER OU DECOMPOSER LE PROBLEME INITIAL EN UN OU PLUSIEURS SOUS-PROBLEMES PLUS PETITS OU TRIVIAUX DE SORTE A REDUIRE LES TEMPS DE RESOLUTION DU PROBLEME GLOBAL. DIVERSES TECHNIQUES DE DECOMPOSITION ISSUES DE LA THEORIE DES GRAPHES SONT PROPOSEES. LA DIVERSITE DES DECOMPOSITIONS POSSIBLES MISES EN EVIDENCE LORS DE CETTE ETUDE INCITE A L'EXPLOITATION DES OUTILS DE DECOMPOSITION DANS LE CADRE D'UNE ANALYSE INTERACTIVE (HOMME-MACHINE) DES FLUX. LE TROISIEME CHAPITRE MONTRE A TRAVERS DEUX EXEMPLES SUR DES DONNEES REELLES L'APPORT DE L'ANALYSE DES FLUX SELON LE CONCEPT D'ORDRE. CES EXEMPLES MONTRENT COMMENT ANALYSER LA STRUCTURE DES DONNEES APRES DETERMINATION DE LEUR WFAS. LA COMBINAISON ET LA SUPERPOSITION DE LA STRUCTURE D'ORDRE A D'AUTRES STRUCTURES SONT TRAITEES EN FILIGRANE. UN COURT CHAPITRE DE CONCLUSION RAPPELLE LES DIVERSES CONTRIBUTIONS ET PRESENTE LES PERSPECTIVES LAISSEES PAR CES TRAVAUX.
Download or read book Optimization of Complex Systems Theory Models Algorithms and Applications written by Hoai An Le Thi and published by Springer. This book was released on 2019-06-15 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains 112 papers selected from about 250 submissions to the 6th World Congress on Global Optimization (WCGO 2019) which takes place on July 8–10, 2019 at University of Lorraine, Metz, France. The book covers both theoretical and algorithmic aspects of Nonconvex Optimization, as well as its applications to modeling and solving decision problems in various domains. It is composed of 10 parts, each of them deals with either the theory and/or methods in a branch of optimization such as Continuous optimization, DC Programming and DCA, Discrete optimization & Network optimization, Multiobjective programming, Optimization under uncertainty, or models and optimization methods in a specific application area including Data science, Economics & Finance, Energy & Water management, Engineering systems, Transportation, Logistics, Resource allocation & Production management. The researchers and practitioners working in Nonconvex Optimization and several application areas can find here many inspiring ideas and useful tools & techniques for their works.
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
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 Microreaction Technology written by M. Matlosz and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt: IMRET 5 featured more than 80 oral and poster communications, covering the entire interdisciplinary field from design, production, modeling and characterization of microreactor devices to application of microstructured systems for production, energy and transportation, including many analytical and biological applications. A particularly strong topic was the investigation of the potential of microstructuring of reactors and systems components for process intensification. Perspectives of combining local, in situ, data acquisition with appropriate microstructuring of actuators and components within chemical and biological devices were explored in order to enhance process performance and facilitate process control.
Download or read book Individual Malaria Control written by United States. Department of the Army and published by . This book was released on 1977 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AGARD Conference Proceedings written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The International Levee Handbook written by CIRIA. and published by . This book was released on 2013 with total page 1332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessing the National Health Information System written by Health Metrics Network and published by World Health Organization. This book was released on 2008 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Health Metrics Network (HMN) was launched in 2005 to help countries ... improve global health by strengthening the systems that generate health-related information for evidence-based decision-making."--Introd.
Download or read book Epidemiological Surveillance in Animal Health written by Barbara Dufour and published by Fao. This book was released on 2009 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the result of collaboration among epidemiological surveillance specialists at all the operational echelons of an epidemiological surveillance network: organisation, training, data management and evaluation. The coordinators of various networks contributed their valuable experience to this practical guide. This practical guide is aimed at all those responsible for epidemiological surveillance network design, organisation and operation in both the northern and southern hemispheres
Download or read book Estimation with Applications to Tracking and Navigation written by Yaakov Bar-Shalom and published by John Wiley & Sons. This book was released on 2004-04-05 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: Expert coverage of the design and implementation of state estimation algorithms for tracking and navigation Estimation with Applications to Tracking and Navigation treats the estimation of various quantities from inherently inaccurate remote observations. It explains state estimator design using a balanced combination of linear systems, probability, and statistics. The authors provide a review of the necessary background mathematical techniques and offer an overview of the basic concepts in estimation. They then provide detailed treatments of all the major issues in estimation with a focus on applying these techniques to real systems. Other features include: * Problems that apply theoretical material to real-world applications * In-depth coverage of the Interacting Multiple Model (IMM) estimator * Companion DynaEst(TM) software for MATLAB(TM) implementation of Kalman filters and IMM estimators * Design guidelines for tracking filters Suitable for graduate engineering students and engineers working in remote sensors and tracking, Estimation with Applications to Tracking and Navigation provides expert coverage of this important area.
Download or read book Phronesis as Professional Knowledge written by Elizabeth Anne Kinsella and published by Springer Science & Business Media. This book was released on 2012-07-30 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phronesis is the Aristotelian notion of practical wisdom. In this collected series, phronesis is explored as an alternate way of considering professional knowledge. In the present context dominated by technical rationalities and instrumentalist approaches, a re-examination of the concept of phronesis offers a fundamental re-visioning of the educational aims in professional schools and continuing professional education programs. This book originated from a conversation amongst an interdisciplinary group of scholars from education, health, philosophy, and sociology, who share concerns that something of fundamental importance – of moral signi?cance – is missing from the vision of what it means to be a professional. The contributors consider the ways in which phronesis offers a generative possibility for reconsidering the professional knowledge of practitioners. The question at the centre of this inquiry is: “If we take phronesis seriously as an organising framework for professional knowledge, what are the implications for professional education and practice?” A multiplicity of understandings emerge as to what is meant by phronesis and how it might be reinterpreted, understood, applied, and extended in a world radically different to that of the progenitor of the term, Aristotle. For those concerned with professional life this is a conversation not to be missed.
Download or read book Principles of Thematic Map Design written by Borden D. Dent and published by Addison Wesley Publishing Company. This book was released on 1985 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spatial Statistics and Models written by G. L. Gaile and published by . This book was released on 2014-09-01 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Rotorcraft Technology written by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Flight Vehicle Integration Panel. Symposium and published by . This book was released on 1997 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
