نتایج جستجو برای: modelisation
تعداد نتایج: 237 فیلتر نتایج به سال:
Sodium cooled fast neutron reactors (SFR) are one of the selected reactor concepts in framework Generation IV International Forum. In this concept, unprotected loss cooling flow transients (ULOF), for which non-triggering backup systems is postulated, regarded as potential initiators core melting accidents. During an ULOF transient, spatial distributions fuel, structure and sodium temperatures ...
This thesis is focused on the application of statistical learning methods for the temperature prediction of anelectronic component embedded in a radar. We study a simplified case of real systems, the system under study islimited to a single component mounted on a reduced cooling system. The first chapter is devoted to heat transfermodelisation. After presenting the major mechani...
M. Perucho § Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany E-mail: [email protected] The high kinetic energy outflowing in the jets of microquasars is delivered to the surrounding interstellar medium. This energy input can cause the formation of bow shocks and cocoons that may be detectable from radio to gamma-ray energies. Evidences or hints of emission...
This thesis deals with fractal compression of still images based on the theory of iterated function systems IFS After an overview of the main lossy and lossless still image compression methods we introduce the IFS theory Then we detail the main fractal compression algorithms proposed in the literature A coder involves compari sons between two sets of blocks A block in the partition of the origi...
Vic Norris1,2, Abdallah Zemirline1,3, Patrick Amar1,4, Pascal Ballet1,3, Eshel Ben Jacob5, Gilles Bernot1, Guillaume Beslon1,6, Eric Fanchon1, Jean-Louis Giavitto1,7, Nicolas Glade1, Patrick Greussay1, Yohann Grondin1, James A. Foster8, Guillaume Hutzler1, Francois Kepes1, Olivier Michel1,7, Gradimir Misevic1,2, Franck Molina1,9, Jacqueline Signorini1, Pasquale Stano10 and Alain Thierry1,11 1Ep...
Electronic noses are customized devices employed to detect and to identify gaseous mixtures, even to give the concentration of the atmosphere components. Nowadays, the research in this domain is more and more growing, in Europe and other countries in the world, for many applications, such as environmental protection, food industries, perfumery, public safety, medicine, and pharmacy. Electronic ...
ABSTRACT Speckle noise is often correlated due to image post-processing or imperfect imaging transfer function. in order to filter correlated speckle noise in a multiscale framework (stationary wavelet decomposition), we propose two approaches, respectively parametric and non parameteric. The first approach is based on a parametric modelisation of the speckle autocorrelation function using a co...
This thesis presents the use of sequential and variational methods for tracking applications in image se-quences. These techniques aim at estimating a system state from a dynamical model and a set of noisy andsparse observations. Sequential methods are usually used in computer vision community but limited to smalldimensional state spaces. In metorology or oceanography, data assimila...
Dealing with the plane behaviour of a composite quasi-unidirectional elementary ply made of E glasslpolyester, this paper contributes to the study of impact phenomena on ceramic/composite bi-layered targets. Firstly, a quasistatic modelisation of the elementary ply behavior, in plane tensile and plane shear, is presented. It allows a good description of the residual strains and of stiffness los...
Wheat (Triticum aestivum L. cv Etoile de Choisy) microsomes catalyzed the cytochrome P-450-dependent oxidation of the herbicide diclofop to three hydroxy-diclofop isomers. Hydroxylation was predominant at carbon 4, with migration of chlorine to carbon 5 (67%) and carbon 3 (25%). The 2,4-dichloro-5-hydroxy isomer was identified as a minor reaction product (8%). Substrate-specificity studies show...
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