Tesis sobre el tema "Analyse corrélative"
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Pouget, Fabien. ""Système distribué de capteurs pots de miel: discrimination et analyse corrélative des processus d'attaques"". Phd thesis, Télécom ParisTech, 2006. http://pastel.archives-ouvertes.fr/pastel-00001751.
Texto completoGainnier, Marc. "Analyse corrélative des événements physiologiques, électrophysiologiques et biochimiques au cours du travail musculaire dynamique". Aix-Marseille 2, 2002. http://www.theses.fr/2002AIX20673.
Texto completoGuyot, Claire. "Analyse chimique avancée des diodes électroluminescentes organiques". Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALT029.
Texto completoSince their invention in 1987 by Tang and Van Slyke, organic light-emitting diodes (OLEDs) have achieved tremendous progress leading to their commercialization twenty years later. Nevertheless, the integration of these devices in certain applications faces a number of challenges, notably in terms of efficiency, lifetime and stability. To improve the electro-optical performance of OLEDs, it is essential to understand the degradation mechanisms at play during device operation, in order to propose new structures, molecules and dopants.Time of flight secondary ion mass spectrometry and X-ray photoelectron spectroscopy (XPS) are routinely used to study chemical composition of multilayers. With the development in the early 2000s of new cluster ion sputtering sources such as argon clusters, a reliable analysis of organic multilayer and interfaces has become possible. However, analysis can damage organic molecules and therefore hide small chemical changes related to the aging of OLEDs.A new methodology has been developed to minimize those damages related to analysis and also correlate both characterization techniques. This method is based on the analysis of the surface of a shallow angle bevel crater (with an angle of about 0,01°). The crater is fabricated by varying the fluence of the sputtering beam over the surface of the sample, therefore revealing the organic stack over the surface of the crater. The in-depth information is converted into lateral information over the surface of the bevel crater. This method enables the correlation of ToF-SIMS and XPS results on the same area whilst providing similar depth information compared to dual-beam depth profiling.This protocol was used to analyze electrically aged OLEDs. Multiple degradation mechanisms were highlighted. A dissociation of the organic molecules has been observed with aging, inducing the accumulation of charge carrier traps as well as the formation of non-radiative recombination centers. XPS analysis reveal the apparition of energy barriers that degrade the charge carrier equilibrium and shift the recombination zone. Finally, the emissive layer as well as the electron transport layers are particularly linked to the loss of performances of the devices, demonstrating the interest in developing new stable molecules or dopants for electron transport.Two inorganic elements (calcium and silver) for the doping of the electron transport layer were studied. The formation of a complex between BPhen molecules and silver was observed by ToF-SIMS and XPS. The doping and electro-optical characteristics (I-V-L) of both layers are similar. A better electrical and air-exposure stability was demonstrated for the doping with silver atoms. This doping is very promising to increase the electro-optical performances of OLEDs
Gemin, Olivier. "Analyse morphométrique et modélisation d'épines des dendrites basales de neurones pyramidaux des couches 2-3 du cortex somato-sensoriel : une étude en microscopie corrélative optique-électronique". Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEE039.
Texto completoDendritic spines receive most excitatory synaptic contacts in the cortex, and spine morphology shapes the compartmentalization of synaptic signals. The aim of my thesis has been to develop a correlative light-electron microscopy (CLEM) approach in order to quantify the morphological parameters of identified dendritic spines in intact cortical circuits. I used CLEM to characterize spine ultrastructure along basal dendrites of identified neurons. These measurements were used to constrain a model of dendritic integration. Our model enabled quantifying which proportion of reconstructed spines effectively compartmentalized electrical signals, and we used it to approach the function of a subset of spines that harbour a supernumerary inhibitory contact, the role of which is yet unknown. Our modeling effort unveils a signaling mechanism, prominent in dually-innervated spines, by which an inhibitory signal can attenuate the calcium influx generated in the spine head by an excitatory signal, while depolarization amplitude is unabated, which potentially impacts synaptic plasticity
Partouche, David. "Analyse de l’assemblage de peptides amyloïdes bactériens". Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLX084/document.
Texto completoHfq is a pleiotropic bacterial protein that determines several phenotypic characteristics. Its main function is to facilitate responses to stresses that bacteria may encounter during environmental changes, mainly by using post-transcriptional genetic control. The protein, by its capacity to interact with RNA, in particular small non-coding RNA, enables a rapid regulation of gene expression. In addition, the protein also interacts with DNA and compacts it. From a structural point of view, the protein adopts an Sm-like fold, characterized by a toroidal oligomer formed by a continuous 30-stranded β-sheet. Besides its conserved N-terminal Sm domain, Hfq also possesses a C-terminal region (CTR) that can vary in size and sequence between bacteria. My PhD work focused on the analysis of this CTR region in Escherichia coli bacteria. Indeed, this region has the capacity to form an amyloid structure. This structural dynamic is related to the formation of self-assembled structures in vivo, in the proximity of the inner membrane and in the nucleoid.Using various physicochemical techniques (molecular microscopy, spectroscopy and infrared microscopy, circular dichroism and small angle X-ray scattering), my work consisted in characterizing the assembly of this region of Hfq, as well as the factors influencing its assembly (in particular, the presence of nucleic acids). A part of my work consisted in setting up an innovative correlative–imaging method to analyze the chemical and morphological signature of a single amyloid fibre. Finally, my work focused on the analysis of the effect of compounds that inhibit the aggregation of the amyloid structure, which could constitute a new way to develop a novel class of antibiotics
Bouziane, Ahmed. "Étude corrélative d'un plasma multipolaire d'oxygène et des diélectriques formés dans ce plasma sur un substrat semi-conducteur : application à la passivation du phosphure d'indium". Nancy 1, 1993. http://www.theses.fr/1993NAN10039.
Texto completoOrgambide, Guy. "Exopolysaccharides de Pseudomonas solanacearum : analyse structurale et corrélation avec la virulence". Toulouse 3, 1990. http://www.theses.fr/1990TOU30013.
Texto completoDiallo, Mamadou Hawa Hann. "Analyse quantitative tomodensitométrique des poumons de patients emphysémateux : corrélation radio-fonctionnelles". Bordeaux 2, 2000. http://www.theses.fr/2000BOR28808.
Texto completoNumerous parameters derived from the lung histogram could be used to assess emphysema, nevertheless only the average lung density (Dm) i. E. The first moment (m1) of the distribution and the fifth percentile were currently used in these quantitative studies. Decrease in Dm could be related to either distension, tissue loss or a combination of the two abnormalities and may not be interpreted accurately on morphological basis. The aims of the present study were to establish, 1) if the parameters of the histogram curve are valid indewes for quantifying emphysema, 2) if tissue loss occurs in emphysematous lungs and 3) to relate these changes to lung function. Contiguous 8 mm thick scans of the whole lungs, were obtained at Functional Residual Capacity (FRC) in 115 emphysematous patients and 18 healthy subjects. Histograms were sampled between -1000 to -350 HU and studied using descriptive statistics. Lung mass (M density (Dm) and distension corrected density (Dc) were computed. Skewness and kurtosis were higher in the emphysema group. The mode (Mo) median (me) and m1, were significantly lower than in healthy subjects and were correlated significantly to the parameters of obstruction and distension, however functional parameters could explain only between 51 and 67 % of the models estimate of the parameters. Lung mass was normal or increase in most cases (> 80 %), but significant loss of tissue was reported in the lung base in some patients. In this group with low lung mass there was a trend of alteration in body weight and lung function. Multivariate analysis showed that there was a significant relationship between structural lung characteristics and the clinical types of emphysema. Parameters of the histogram are valid indexes for characterisation of emphysema and give supplementary informations compared to function. The clinical types of emphysema were related to structural individualities
Rincon, Mejia Carlos Andrés. "Caractérisation des émissions gazeuses et des odeurs en compostage : étude de la corrélation entre la concentration d'odeur et la composition chimique des émissions". Thesis, Rennes 1, 2019. http://www.theses.fr/2019REN1S019/document.
Texto completoWaste valorization through composting and methanization are actively promoted by the EU policies. However, these waste recycling technologies face a crucial challenge regarding the release and control of odorous and hazardous gas emissions. Indeed, odor pollution is the principal cause for public opposition to waste processing, leading to the closure and lawsuits for waste treatment units. Currently, there is a lack of odor and chemical emissions inventories to support odor and air pollution management plans due to the complexity of odor assessments, generally involving sensory and chemical analysis. Hence, the aim of this PhD thesis was to characterize extensively the gas emissions and odors released during the composting process. To this end, the patterns of odor and pollutant emissions were first traced throughout different operational stage of composting process, namely, storage, active phase, turning and curing. The results showed that the active phase and turning played a pivotal role in odor nuisance generations which were mainly caused by volatile sulfur compounds (VSC). Then, further efforts were focused on characterizing the gas emissions released along the composting active phase of fifteen solid wastes and digestate. The results corroborated the relevance of VSC on odors production during composting and enabled to differentiate the odor impact of gas emissions as a function of the wastes’ feedstock. The last part of this research work was devoted to correlate both, sensory and chemical measurements, through univariate and multivariate regression analysis to ease and strength odor monitoring in waste treatment units. Notably, a partial least squares model improved odor concentration prediction based on the chemical composition of emitted gases
Handika, Nuraziz. "Multi-fissuration des structures en béton armé : analyse par corrélation d'images et modélisation". Thesis, Toulouse, INSA, 2017. http://www.theses.fr/2017ISAT0001/document.
Texto completoThe modelling of cracking of reinforced concrete using the finite element method requires taking into account, in addition to the concrete damage, three phenomena: the specificity of the steel-concrete bond, the self-stress due to shrinkage, and the probabilistic scale effect due to the heterogeneity of concrete. This research is based on an experimental campaign to obtain the behaviour of the bond and the characteristics of the cracks on structural elements. The technique of digital image correlation was used to observe the spacing and opening of the cracks.The steel-concrete bond is considered in modelling using elastoplastic interface elements based on the experimental results of the pull-out tests. The effects of shrinkage are taken into account via a poro-mechanical framework. Finally, the probabilistic scale effect is integrated into the modelling via a random field method and then a weakest link one. Modelling is applied to the reinforced concrete structural element studied in the laboratory, which makes it possible to quantify the relative importance on cracking of the steel-concrete bond, the stresses induced by shrinkage, and the tensile strength heterogeneity of the material
Vergne, Maxime. "Analyse du relief, corrélation avec le drainage : application au bassin de la Garonne". Toulouse 3, 1994. http://www.theses.fr/1994TOU30101.
Texto completoMartin, Guillaume. "Méthode de corrélation calcul/essai pour l'analyse du crissement". Thesis, Paris, ENSAM, 2017. http://www.theses.fr/2017ENAM0012/document.
Texto completoBrake squeal is a nuisance commonly encountered in the car industry which often results in financial penalties towards brake manufacturers, even if no robust solution exists for the conception. Numerical simulation and experimental characterizations are the classical two-track approaches to analyze squeal phenomena. Numerical simulation allows a fine analysis of vibration behaviors and the evaluation of conception modification impacts, but models are not perfect and their validity domain must be defined. Measurement guarantees that every parameter is taken into account, but it is often spatially poor and not really suited for modification prediction. In this context, the thesis objectives are to make an overview of test operating methods, to provide tools allowing an easier interaction between both test and simulation teams and to enforce the developments in a business application.After a review of the hypotheses and methods for modal identification, a critical analysis of the identification results leads to the characterization of biases and the introduction of detailed criteria to evaluate the quality of the result. Calculation/test correlation allows to qualify the models and tools are integrated to facilitate its implementation. Several criteria are defined to highlight the sources of bad correlation coming from the measure on the one hand and the model on the other hand. Sources of poor correlation are also identified with the MDRE expansion algorithm, whose limitations are compared with those of static and dynamic expansions.Model updating is then processed by a systematic procedure imbricating the steps of updating of geometry, material properties and contacts between components. A contact parametrization is proposed with a multi-model reduction allowing calculation times compatible with industrial time. It also allows sensitivity studies with the introduction of the notion of component modes in an assembly.Finally, a detailed analysis of a measurement campaign on a braking system under squeal conditions is carried out. A parallel between the changes of the limit cycle and the degree of coupling of the complex modes is proposed. In the time-frequency domain, variability, repeatability, reproducibility and the ability to aggregate sequential measurements are evaluated. The result is finally extended on the finite element model, which allows useful interpretations
COULAIS, PHILIPPE. "Traitement d'images de granulats : application à leur analyse granulométrique : corrélation avec l'analyse par tamisage". Poitiers, 1991. http://www.theses.fr/1991POIT2401.
Texto completoHanatani, Yoshito. "Trompette à six trous ou Analyse sémantique de corrélation dans les bases de données". Paris 11, 1987. http://www.theses.fr/1987PA112488.
Texto completoThis thesis addresses the following two issues of relational database theory: (1) a two-level update propagation model and (2) a representation theory of dependency constraints. The two-level propagation model is proposed for the auto-deductive updates with the minimum loop cost and with the strict respect of the semantics of the Universe. The theory of representation of constraints is developed as a design tool. By virtue of its radical reduction of the expression complexity through the use of the simple abject called "bases" of constraints, this theory enables us to seize the deductive power and all other characteristics of the constraints, which are necessary for the conception of the database scheme. Starting from a uniform representation of the FD + MVD constraints, we see that its extension to the FD + multi-JD constraints is more natural and significant. The foundation of this extension leads us to the direct grasp of the constraint using a configuration CDDO, which can be seen as a dependency expression of new category
Nkiet, Guy Martial. "Mesures d'association et analyse canonique". Toulouse 3, 1994. http://www.theses.fr/1994TOU30171.
Texto completoGrün, Marc. "Analyse de la dynamique de solitons photoréfractifs". Metz, 2007. http://docnum.univ-lorraine.fr/public/UPV-M/Theses/2007/Grun.Marc.SMZ0703.pdf.
Texto completoLaser beams propagating in a photorefractive crystal create spatial solitons called photorefractive solitons, in a phenomenon labelled filamentation. Their dynamics, complex and sensitive to initial conditions, make us assume the presence of spatial chaos, as would suggest beam propagation simulations. In order to characterize this assumed chaos, we first used a Modelling Program based upon a system interpretation of solitons ; Event Conformation Method then quantized the divergence between two dynamics from near but different solitons populations. Most results showed fast decorrelations ; but the dynamics we thus characterized cannot be labelled chaotic, because of their tendency to decay. Coming back to simulations, we built statistical estimators called ‘divergence strengths’ quantizing the divergence between two simulations ; these estimators show to be proportional to nonlinear coefficient, a parameter of the modelled crystal. Because of an identical decay, these dynamics cannot be qualified as chaotic ; nevertheless, the high initial condition sensitiveness is on par with a chaotic system. This method was then adapted to experimental data, where time and space decorrelation has been successfully characterized thanks to an innovative concept of multicorrelation. Then, using concepts based on fractal dimensions and estimators from econometrics, we characterized the organizing of solitons dynamics, node-wise and energy redistribution-wise. Thus we concluded that despite the absence of validation of a few chaos criteria, dynamics there show strong decorrelations whose numerical characterizations display empirical resemblance to a standard chaotic system
Rovira, Hervé-Pierre. "Analyse acoustique et glottographique de la voix prothétique du laryngectomisé : essai de corrélation anatomo-physiologique". Bordeaux 2, 1990. http://www.theses.fr/1990BOR23026.
Texto completoAriaudo, Myriam. "Analyse théorique de la génération optoélectronique d'impulsions ultrabrèves par photoconduction". Limoges, 1996. http://www.theses.fr/1996LIMO0049.
Texto completoArhondakis, Stylianos. "Corrélation entre expression des gènes et isochores". Paris 7, 2008. http://www.theses.fr/2008PA077009.
Texto completoThis thesis investigates the effects of base composition (Le. , GC, the percentage of guanine and cytosine) on expression levels of human genes, using genome-wide and single-gene expression data. Beyond the evolutionary importance of this subject, several practical implications of GC when assessing expression levels are reported and explained. In the first part of the thesis the persistence and biological validity of the correlations between expression and GC level of human genes is shown, supporting this functional property of human isochores. Detailed investigations presented here, concerning the role of GC in technologies monitoring the transcriptome, allowed us to understand and detect several causes affecting not only the correlations, but also a faithful detection of the human transcriptome. In the second part, an in silico analysis of experimental data led to an improved understanding of how the compositional environment affects gene expression, even in the context of plasmids. This study highlights the relevance of compositional properties for gene expression, and challenges the use of plasmids as a successful way to eliminate effects 01 expression of the genomic context where a gene is located. Summarizing, in this thesis, a strategy is adopted that aims to recognize the biological and technical influence of GC on expression levels as estimated by genome-wide and single-gene techniques. This led to the achievement of a work that implicates two very different fields of study, evolutionary and technological. Several of the results reported here may have practical consequences for successfully quantifying and controlling expression levels, for improving transcriptome techniques and/or expression vectors, and for their application in the biomedical community
Lechevalier, François. "L'analyse factorielle conjointe d'une famille de triplets indexés". Lille 1, 1990. http://www.theses.fr/1990LIL10157.
Texto completoBoutin, Carl. "Modélisation et analyse sismique des barrages-poids en béton et corrélation expérimentale : cas du barrage de Beauharnois". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq21724.pdf.
Texto completoMith, Setha. "Analyse sensorielle - corrélation entre la perception sensorielle et l'analyse instrumentale descriptive du pouvoir collant des élastomères silicones". Besançon, 2007. http://www.theses.fr/2007BESA2056.
Texto completoThe aim of this study is to establish a correlation between the sensorial perception of the tackiness of the silicone elastomers and the physical and mechanical properties of their surface. A set of silicones, more or less tacky, has been made in our laboratory in order to control the process of realization and to obtain samples with steady and " distinct properties. A physicochemical characterization bas been realized with infrared spectroscopy and droplet tests. Sensorial analysis bas been realized with an appropriated developed protocol. This sensorial analysis is composed of two different tests: a descriptive test (test of comparison) and a discriminative one (test of quantification). One group of naïve people and one of experts have done the two sensorial tests. The resulting data are analyzed with classical statistic tools used in sensorial analysis (Friedman test, average notation). This analysis allows samples classification and allows to enlighten the importance of mechanical properties such as the Young' s modulus in the touch sensation. The quantification of the tackiness and the mechanical properties need the development and the realization of a dedicated sensorial metrology device. This apparatus allows to make instrumented indentation and to reproduce tactile movement. The influence of experimental conditions and parameters, and the punch nature bas been studied. The resulting data allow to establish a correlation between sensorial analysis and the measured mechanical properties. We show that the adhesion force is not a sufficient parameter to qualify material tackiness; some experimental parameters (such as the unloading velocity or the indenter geometry) have great influence on the results
Bormann, denis. "Contribution à l'étude de la corrélation structure-propriétés dans certains solides carbonés intercalés". Montpellier 2, 1995. http://www.theses.fr/1995MON20118.
Texto completoPicard, Martine. "Évolution de la microstructure d'un PET lors du bi-étirage soufflage ; corrélation au durcissement structural". Phd thesis, École Nationale Supérieure des Mines de Paris, 2008. http://tel.archives-ouvertes.fr/tel-00343353.
Texto completoFayad, Fouad. "Analyse cinématique tridimensionnelle de l'épaule : corrélation entre la perturbation du rhythme scapulohuméral et la mesure de l'incapacité fonctionnelle". Saint-Etienne, 2008. http://www.theses.fr/2008STET002T.
Texto completoRodrigues, Juan-Miguel. "Analyse de la répartition du potentiel et des charges dans une flamme polarisée : Corrélation avec la distance d'extinction". Rouen, 2005. http://www.theses.fr/2005ROUES055.
Texto completoDuring hydrocarbon combustion processes, several charged species are produced which confer electrical properties to the reaction area. In a spark ignition engine, the polarization of the central electrode induces a current called ionic current. By measuring this current it is possible to extract information on the quality of combustion in the chamber. Our study presents an elucidation of the mecchanisms of conduction in order to determine the parameters controlling the current. Having identified the positive and negative ions contained in the flame front and in the burnt gases, the current and the electric potential were measured firstly in a premixed methane/air electrically insulated flame stabilized on a burner and then in a propagating flame in a tube. Electrode parameters such as their surface or biasing voltage were studied. The results show that electrical potential is constant in the flame front and that the intensity of the current depends on the flame/cathode junction. An analytical model of the junction limiting the current is presented. A direct correlation between the current and the quenching distance was proven
Neveu, Bérangère. "Analyse de réponses lymphocytaires T CD8+ dirigées contre le virus de l'hépatite C : corrélation avec le statut clinique". Nantes, 2007. http://www.theses.fr/2007NANT2093.
Texto completoUp to 170 million people are infected by hepatitis C virus (HCV), among whom 4/5 remain chronically infected and are predisposed to cirrhosis and/or hepatocarcinoma. To better understand the mechanisms that influence progression to HCV chronic infection versus viral control, we performed an in-depth functional and molecular analysis of highly purified HCV-specific T cells in seropositive donors, having resolved their infection or not, and in HCV-seronegative healthy donors. We managed to isolate from blood samples HCV-specific CD8+ T cells directed against three immunodominant HCV epitopes restricted by HLA-A*0201, using magnetic beads coated with HLA class I/peptide complexes. T cell populations specific to those antigens were isolated from almost all donors, irrespective of their serological status. Chronically infected patients yielded weaker HCV-specific CD8+ responses than those having cleared their infection, as assessed by IFN- production, cytotoxicity and degranulation assays. These functional differences were primarily accounted for by decreased frequency of specific T cells expressing high-affinity TCR in chronically infected patients rather than by intrinsic T cell functional defects or by active downmodulation by inhibitory receptors. Healthy donors yielded mainly low avidity HCV-specific T cell responses, very similar to chronic patients, although high avidity subsets were detected in some individuals. Our results indicate that enrichment for high avidity T cells is associated with successful viral clearance and suggest a link between the quality of the initial HCV-specific T cell repertoire and susceptibility to chronic infection
Abdessemed, Lila. "Intégration de la contigui͏̈té en analyse factorielle discriminante et généralisation de l'analyse factorielle multiple aux tableaux de fréquence". Rennes 1, 1994. http://www.theses.fr/1994REN10029.
Texto completoValdés-Alonzo, Gabriel. "Identification of material properties and phase distribution of heterogeneous materials through data-driven computational methods : Towards an enhaced constitutive space". Electronic Thesis or Diss., Ecole centrale de Nantes, 2022. http://www.theses.fr/2022ECDN0023.
Texto completoIdentifying the constitutive relations of materials is an essential task to understand their behavior. Classical methods like testing can be effective in understanding these relationships, but introducing models can lead to biased formulations and errors. Furthermore, not all constitutive relations can be determined directly by mathematical expressions or there might be parameters that we cannot obtain easily through common techniques. Data-Driven Identification (DDI), developed by Leygue et al. (2018), is an algorithm in which the constitutive relation of elastic materials is defined by a database of material points that need to be computed based on measured strain fields, applied forces and known geometry of tested samples of the material. The algorithm simultaneously estimates the corresponding values of the stress fields that emerge due to the deformations measured in the samples. In this thesis, we focus on departing from elasticity to cover more complex material behaviors with the DDI algorithm. In a first step, the method is applied to heterogeneous samples, where a post-process is performed with Correspondence Analysis to separate the different phases in a sample and identify their separated behavior. Then, DDI was also applied to linear viscoelastic materials, where an extended phase-space approach is used to account for the time dependence of the behavior. Finally, different variations of the algorithm are considered by combining DDI with different statistical techniques such as the Principal Component Analysis, in a search for speed and accuracy of the predictions through dimensionality reduction. Parallel to this, the method is tested in heterogeneous composite samples and compared to expected results obtained by classical methods
Largeau, Jean-François. "Analyse expérimentale de la dynamique et du rayonnement acoustique d’un écoulement de marche montante". Poitiers, 2004. http://www.theses.fr/2004POIT2306.
Texto completoThe subject of this experimental study is the flow generated over a forward-facing step. The impact of several parameters (height of step and rate of flow) on the spatio-temporal flow organisation is investigated. The aim is also to clarify relationships between wall fluctuation pressure and the velocity field. Also, a model is designed and microphones probes are developed to investigated wall fluctuations pressures. Moreover, spatial flow organisation is examined with a Particle Image Velocimetry system for different configurations (height and flow rate). First the 2D hypothesis is improved (with wall flow visualisations experiments, hot-wire anemometry, wall pressure fluctuations probes). Moreover, spatial flow organisation is examined with a Particle Image Velocimetry system for different configurations (height and flow rate). The velocity field is mesurated simultaneously with the wall pressure fluctuations and acoustic pressure. Accordingly, the structure convection velocity, integrals flow scales and correlations between these different data are obtained overall the model. Finally, a Curle model computation is realised with experimental wall pressure fluctuations data and the estimated sound field is compared with acoustic measurements
Kaouache, Belkhiri. "Analyse multiéchelles de la transformation martensitique induite par contrainte dans les alliages à mémoire de forme: corrélation contraintes-microstructure". Phd thesis, Paris, ENSAM, 2006. http://pastel.archives-ouvertes.fr/pastel-00002209.
Texto completoGhisalberti, Claude. "Analyse de corrélation de particules légères sélectionnées par calorimétrie neutronique dans la réaction 208Pb + 93Nb à 29 MeV/u". Nantes, 1994. http://www.theses.fr/1994NANT2119.
Texto completoTardif, Fabrice. "Analyse des mécanismes d'endommagement dans les composites 3D C/C : mesures optiques des champs de déformation par corrélation d'image". Bordeaux 1, 1998. http://www.theses.fr/1998BOR10671.
Texto completoPicard, Martine. "Evolution de la microstructure d'un PET lors du bi-étirage soufflage. Corrélation au durcissement structural". Paris, ENMP, 2008. http://tel.archives-ouvertes.fr/tel-00343353.
Texto completoThe evolution of the poly(ethylene terephthalate) microstructure was studied during uni-axial stretching as well as during stretch-blow moulding. Drawing was made between glass transition and cold crystallisation temperatures (i. E. Between 90 °C and 115 °C). PET was quenched orannealed at the end of drawing. The evolution of the strain-induced microstructure and its texture was investigated by X-Ray diffraction (WAXS and SAXS). The strain-induced amorphous phase was also studied by dynamic mechanical and thermal analysis (DMTA). Whatever the kind of samples (thin or thick samples as well as preforms), the kind of drawing or the experimental conditions used (i. E. Temperatures and strain-rates) are, strain-induced crystallisation do not lead to perfect crystalline microstructure in case of applying rapid quenching at the end of stretching. This means that the microstructure observed at the end of drawing is highly influenced by the post-cooling stage. Strain hardening is related to nucleation step rather to crystallisation of perfect crystal. The amorphous phase is, for its part, very constrained during drawing, showing an increasing alpha transition and better ability to crystallize during DMTA measurements. Free stretch-blow moulding tests have shown how the blown hollow parts are heterogeneous in term of microstructure, morphology and polymer chain orientation along a bottle and within the panel thickness. This observation partly explains why it is difficult to relate the end-used mechanical properties to the strain-induced microstructure. Comparative studies of free and industrial stretch-blow moulding demonstrate that the mould could impact the kinematics of blowing. As a consequence, the mould could severely impact the final induced microstructures and properties
Bourredjem, Abderrahmane. "Contribution à l'inférence sur le coefficient de corrélation intraclasse de concordance dans les études de fiabilité inter-juges". Electronic Thesis or Diss., Bourgogne Franche-Comté, 2023. http://www.theses.fr/2023UBFCK078.
Texto completoMeasurement's reliability refers to its reproducibility when it is randomly repeated on the same subject and is a key metrological property for each measurement validation. The two-way intra-class correlation coefficient of agreement (ICCa) is a statistical parameter used to quantify the inter-rater reliability of continuous (or ordinal qualitative) measurements. It constitute a central reliability index recommended by the regulatory agencies. Nevertheless, its estimators are biased and a lot of solutions have been tried facing to its confidence interval (CI) problem. The latest works indicate that no method works well with a hard-to-detect violation of normality and when the number of subjects OR raters is limited, which is rather the case in practice. Furthermore, no variance stabilizing transformation (VST) nor statistical comparative test are available for the ICCa. The aim of this thesis is therefore to contribute to the development of methods that remedy the lack of the inferential tools for the ICCa. At a first step, we propose new asymptotic methods for the ICCa confidence interval, the calculation of the needed sample size of subjects and raters, and a likelihood ratio test to compare two ICCa. Then, in a second work, we develop three VSTs, improving the properties of the confidence interval for inter-rater reliability studies of moderate sample size, and the synthesis of several ICCa in the context of meta-analyses. Finally, in a third work, dedicated resampling methods are proposed, in combination with the best VST, to improve the ICCa confidence interval performances in case of non-normality with small sample size. It is above all a work of biostatistical methodology, with simulation evaluations of the introduced methods, and applications to several real data sets from inter-rater reliability studies and meta-analyses
Maillé, Laurence. "Elaboration par pulvérisation cathodique réactive RF de multicouches nanométriques. Corrélation entre la structure, la microstructure et les propriétés mécaniques". Evry-Val d'Essonne, 2003. http://www.theses.fr/2003EVRY0011.
Texto completoThe aim of this work consists to performed by reactive sputtering RF nanomaterials : W, W-O, W-N single layers, W-O/W and W-N/W multilayers in order to study the microstructure, the structure and the mechanical properties of these thin films. A study of the growth of the single layers has been necessary to performed the multilayers. Various multilayer mechanical behaviors are obtained: - A Hall-Petch rule is observed for W-N/W multilayer performed with 50 % of nitrogen partial pressure. - For multilayer W-N/W and W-O/W performed with 10 % of nitrogen or oxygen partial pressure, there is no influence of the period thickness on the hardness values and these measurements are higher or lower than the law of mixture
Canteaut, Anne. "Analyse et conception de chiffrements à clef secrète". Habilitation à diriger des recherches, Université Pierre et Marie Curie - Paris VI, 2006. http://tel.archives-ouvertes.fr/tel-00095980.
Texto completotrès largement répandus car ils sont les seuls à atteindre les débits
de chiffrement requis par la plupart des applications et à permettre
une mise en oeuvre sous forme d'un circuit de taille
raisonnable. Dans ce contexte, les travaux présentés dans ce mémoire
ont pour objet la conception de nouvelles attaques sur les algorithmes
symétriques et leur formalisation afin de mettre en évidence les
propriétés structurelles qui les rendent opérationnelles. Cette
approche conduit à de nouveaux critères de conception et à la
construction d'objets qui permettent de leur résister de manière
certaine. Cette étude s'articule notamment autour de l'idée que, pour
résister de manière sûre aux cryptanalyses connues et pour atteindre
de bonnes performances, un chiffrement symétrique doit utiliser des
objets aux propriétés exceptionnelles, dont la structure algébrique
forte ouvre paradoxalement une brèche exploitable dans une nouvelle
attaque. Ce principe est ici décliné pour les deux familles
d'algorithmes symétriques, les chiffrements à flot et les chiffrements
par blocs.
Nzobounsana, Victor. "Analyse canonique généralisée : méthodes, applications, extensions et choix des variables dans les groupes". Rennes 2, 2001. http://www.theses.fr/2001REN20007.
Texto completoThe work of this thesis is based on the method which generalize canonical correlation analysis, cca, proposed by HOTELING. Canonical correlation analysis, CA, measures and represents the linear relationship between two subsets of variables in an unambiguous way. It seeks to find a small number of linear combinations of each set of variables in order to explain or summarise the relationships of them. Many procedures have been proposed to generalize Canonical correlation analysis, GCCA, to three or more sets of variables : Steel (1951), Horst (1961), Carroll (1968), Kettenring (1971), Lafosse (1989). All of those procedures are based on the principle of optimizing some functions of the eigenvalues of the correlation matrix of linear combinations. The solution of such analysis depends therefore on a criterion used by the procedures. After the chapter of introduction (chapter 1), the chapter 2 propose a synthesis of usual technique that generalize the CA. In chapter 4 and 5, two general class of criteria that depends on the eigenvalues of the correlation matrix of linear combinations are proposed. The first class of criteria is used to study the sensitivity to the criterion of canonical variables in GCCA (chapter 4) and, the second class of criteria is used to propose three news methods of GCCA (chapter 5). In chapter 6, we study the necessary and sufficient conditions, NSC, for the equivalience between two GCCA. With these NSC, we propose four criterions to choose the best variables in the groups. All of these methods of GCCA are applied to the real data in chapter 3
Petitgas, Benoit. "Corrélation entre le comportement électrique et les propriétés physico-chimiques des fils émaillés : vers l'origine de la défaillance de machines tournantes en conditions extrêmes". Phd thesis, Université Claude Bernard - Lyon I, 2013. http://tel.archives-ouvertes.fr/tel-00958120.
Texto completoWawrezinieck, Laure. "Confinement moléculaire et organisation de la membrane des cellules vivantes : analyse de la diffusion par spectroscopie de corrélation de fluorescence". Phd thesis, Université de la Méditerranée - Aix-Marseille II, 2006. http://tel.archives-ouvertes.fr/tel-00097010.
Texto completoLa spectroscopie de corrélation de fluorescence (FCS) est une technique puissante permettant de mesurer des coefficients de diffusion. L'étude devient cependant malaisée lorsque la diffusion n'est pas libre, comme c'est le cas des composantes de la membrane cellulaire.
Nous avons montré que la réalisation de mesures FCS à différentes tailles de volumes d'observation permet de tracer les lois de diffusion des molécules dans les membranes des cellules vivantes. Notre méthode permet ainsi de distinguer entre différentes structures de confinement des particules de la membrane plasmique et de mesurer certaines de leurs caractéristiques, comme leur taille ou le temps de confinement moyen. Il a également été possible d'étudier la réorganisation de la membrane cellulaire au cours d'un événement de signalisation.
Bialufu, Ngandu Albert. "Impact des TIC sur la croissance économique : analyse croisée de la corrélation entre l'IDI et l'indice de revenu, 2002-2011". Amiens, 2014. http://www.theses.fr/2014AMIE0050.
Texto completoThis thesis tries to solve the riddle of a society called "Advanced" highly digitized but which hardly supports the acceleration of economic growth. We address this issue by a longitudinal analysis about the nature and scope of the relationship between ICT and economic growth of 194 countries for t he period 2002-2011. Our findings highlight the nonparametric nature of the link between ICT and economic growth that presumably depends on the context of each country. These facts are illustrated by the contradictions observed, especially on the one hand, emerging countries with low ICT's indices and a strong growth on the other hand, the so-called "rich countries" with higher ICT's indices opposed to low growth momentum
Signoret, Philippe. "Analyse des bruits optique-électrique et étude de leur corrélation : Application à une tête optique d'émission laser à réaction répartie". Montpellier 2, 1994. http://www.theses.fr/1994MON20048.
Texto completoLexcellent, Christian. "Quelques aspects thermomécaniques des lois de comportement des alliages métalliques : corrélation fluage-diffusion, analyse thermodynamique, effet de rochet traction-torsion". Besançon, 1987. http://www.theses.fr/1987BESA2038.
Texto completoSabiri, Noura. "Caractérisation du toucher des surfaces polymères, essais de corrélation entre analyse sensorielle : Mise au point d'un matériau à toucher "soft"". Paris, CNAM, 2008. http://www.theses.fr/2008CNAM0624.
Texto completoAux différents cirtères tels que durabilité et confort, toujours pris en compte pour l'achat d'un véhicule, viennent maintenant s'ajouter des critères dedimensions sensorielles comme l'odorat et le toucher. C'est sur l'évlauation de ce dernier cirtère qu'a porté notre étude. Les matières plastiques étant largement utilisées dans l'habitacle automomobile, c'est à leur toucher quue nous nous intéressons particulièrement. Actuellement, seule l'analyse sensorielle permet de carctériser le toucher, mais cette analyse est particulièrement difficile à mettre en oeuvre. C'est pourquoi, nous essayons d'évaluer le toucher à l'aide de mesures physiques adaptées telles que des essais de frottement et de rugosité. La première partie de ce travail consiste tout d'abord à s'assurer de la fiabilité des résultats de l'analyse sensorielle en se basabt sur des critères précis (répétabilité, cohérence, finesse d'analyse), Nous déterminons ensuite le coefficient de frottement et la rugisité de surface d'échantillons variés. Cette étude est précédée par une démarche statistique ayant pour but d'étudier la fiabilité de processus de mesure. Puis, nous essayons d'établir une corrélation entre les résultats de l'analyse sensorielle pour les descripteurs "Glissant" et "Râpeux" et les résultats de mesures physiques associées. Dans la deuxième partie, nous présentons une étude sur l'amélioration du toucher des matériaux à bas de polypropylène utilisés dabs les piéces d'intérieur automobile. L'objectif est ici d'obtenir un matériau à toucher "soft" pour remplacer des pièces revêtues de peinture "soft", tout en gardant les propriétés mécaniques exigées par le cahier des charges
Brière, Mélanie y Mélanie Brière. "Décisions et biais des investisseurs aux marchés financiers : une analyse expérimentale". Master's thesis, Université Laval, 2019. http://hdl.handle.net/20.500.11794/37562.
Texto completoDans le cadre de ce mémoire, nous proposons d’étudier l’effet de deux biais sur les investisseurs aux marchés financiers. Plus particulièrement, nous tentons de déterminer si, conformément à la théorie, l’aversion à la perte entraîne des préférences pour de longs horizons d’investissement et de faibles niveaux de rétroaction, et si l’aversion à l’ambiguïté engendre pour sa part des préférences contraires. Les données expérimentales montrent que l’effet de l’aversion à la perte sur les préférences est minime. Toutefois, l’aversion à l’ambiguïté aurait un effet manifeste sur celles-ci, menant les participants à préférer de courts horizons d’investissement, ainsi qu’une grande fréquence de rétroaction. Ces préférences peuvent vraisemblablement être expliquées par le désir des participants de mettre à jour plus rapidement leurs anticipations afin de sortir du contexte d’ambiguïté dans lequel ils se trouvent.
Laabidi, Selma. "Méthodologie de conception de composants intégrés protégés contre les attaques par corrélation". Phd thesis, Ecole Nationale Supérieure des Mines de Saint-Etienne, 2010. http://tel.archives-ouvertes.fr/tel-00488013.
Texto completoMathieu, Florent. "Analyse de la tenue mécanique d'un liner en titane : apport des mesures de champs cinématiques". Phd thesis, École normale supérieure de Cachan - ENS Cachan, 2013. http://tel.archives-ouvertes.fr/tel-00846252.
Texto completoVelten, Philippe. "Mesure du paramètre de corrélation angulaire bêta-neutrino dans la désintégration de l'6He". Caen, 2011. http://www.theses.fr/2011CAEN2019.
Texto completoThe subject of this work is the data analysis of the LPCTrap experiment which occurred in 2008. The goal was to measure the β-ν angular correlation coefficient, aβν, in the 6He decay at a 0. 5% precision level. Evidences of a discrepancy between the experimental value of aβν and the prediction of the Standard Model (SM) would mean the existence of a vector current in the weak decay of 6He. This discovery would question the V-A structure used to describe the weak interaction in the SM. A Paul trap is used to confine 6He+ ions almost at rest in a very small volume in order to have a decay source as well defined as possible. The emitted β particle and 6Li++ ion are detected in coincidence by detectors located around the trap. Aβν is determined from a comparison between the experimental and a Monte-Carlo simulated distributions of the time of flight of the recoiling ions. During this work, a simulation based on GEANT4 has been developed, taking into account all the experimental effects which are likely to contribute to the systematic error of the aβν estimation. A special focus has been put on the electron scattering modelling. Despite a sufficient experimental statistics and an efficient simulation, a correct estimation was not achieved due to a malfunction of the ion detector. An exploratory statistical study has been undertaken in order to accurately specify the sensitivity level of the measurement performed with the LPCTrap apparatus in testing the hypotheses of the SM. The tools developed in this work will be used to analyze future experiments
Ashby, Mathieu. "Analyse dynamique des lignes de grande portée sous charges de vent". Mémoire, Université de Sherbrooke, 2009. http://savoirs.usherbrooke.ca/handle/11143/1541.
Texto completoGonzalez, Ignacio. "Analyse canonique régularisée pour des données fortement multidimensionnelles". Toulouse 3, 2007. http://thesesups.ups-tlse.fr/99/.
Texto completoMotivated by the study of relationships between gene expressions and other biological variables, our work consists in presenting and developing a methodology answering this problem. Among the statistical methods treating this subject, Canonical Analysis (CA) seemed well adapted, but the high dimension is at present one of the major obstacles for the statistical techniques of analysis data coming from microarrays. Typically the axis of this work was the research of solutions taking into account this crucial aspect in the implementation of the CA. Among the approaches considered to handle this problem, we were interested in the methods of regularization. The method developed here, called Regularised Canonical Analysis (RCA), is based on the principle of ridge regularization initially introduced in multiple linear regression. RCA needing the choice of two parameters of regulation for its implementation, we proposed the method of M-fold cross-validation to handle this problem. We presented in detail RCA applications to high multidimensional data coming from genomic studies as well as to data coming from other domains. Among other we were interested in a visualization of the data in order to facilitate the interpretation of the results. For that purpose, we proposed some graphical methods: representations of variables (correlations graphs), representations of individuals as well as alternative representations as networks and heatmaps. .