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Статті в журналах з теми "Tests à noyaux"
Gourieroux, Monfort, and Renault. "Tests sur le noyau, l'image et le rang de la matrice des coefficients d'un modèle linéaire multivarié." Annales d'Économie et de Statistique, no. 32 (1993): 81. http://dx.doi.org/10.2307/20075927.
Повний текст джерелаTenreiro. "Tests d'ajustement à une densité fondés sur un estimateur non paramétrique à noyau pour des observations dépendantes." Annales d'Économie et de Statistique, no. 43 (1996): 129. http://dx.doi.org/10.2307/20076029.
Повний текст джерелаBarré, Nicolas, I. Amouroux, Rosalie Aprelon, and T. Samut. "Résistance des strongles gastro-intestinaux aux anthelminthiques dans les élevages caprins en Guadeloupe (Antilles françaises)." Revue d’élevage et de médecine vétérinaire des pays tropicaux 50, no. 2 (February 1, 1997): 105–10. http://dx.doi.org/10.19182/remvt.9579.
Повний текст джерелаYushin, Vladimir, and August Coomans. "Ultrastructure of sperm development in the free-living marine nematodes of the family Chromadoridae (Chromadorida: Chromadorina)." Nematology 2, no. 3 (2000): 285–96. http://dx.doi.org/10.1163/156854100509150.
Повний текст джерелаGumusgul, Osman. "Investigation of Smartphone Addiction Effect on Recreational and Physical Activity and Educational Success." World Journal of Education 8, no. 4 (July 25, 2018): 11. http://dx.doi.org/10.5430/wje.v8n4p11.
Повний текст джерелаDIOP, M., O. Thioune, C. Neut, M. Maton, C. Riviere, B. Martel, S. Mahieux, V. Roumy, N. Blanchemain, and B. K. Fall. "Évaluation in vitro de l'activité antibactérienne d'un pansement chargé d'extraits de plantes." Journal Africain de Technologie Pharmaceutique et Biopharmacie (JATPB) 2, no. 3 (December 20, 2023). http://dx.doi.org/10.57220/jatpb.v2i3.64.
Повний текст джерела"Erratum: Tests d'ajustement à une densité fondés sur un estimateur non paramétrique à noyau pour des observations dépendantes." Annales d'Économie et de Statistique, no. 45 (1997): 315. http://dx.doi.org/10.2307/20076062.
Повний текст джерелаДисертації з теми "Tests à noyaux"
Bounliphone, Wacha. "Tests d’hypothèses statistiquement et algorithmiquement efficaces de similarité et de dépendance." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLC002/document.
Повний текст джерелаThe dissertation presents novel statistically and computationally efficient hypothesis tests for relative similarity and dependency, and precision matrix estimation. The key methodology adopted in this thesis is the class of U-statistic estimators. The class of U-statistics results in a minimum-variance unbiased estimation of a parameter.The first part of the thesis focuses on relative similarity tests applied to the problem of model selection. Probabilistic generative models provide a powerful framework for representing data. Model selection in this generative setting can be challenging. To address this issue, we provide a novel non-parametric hypothesis test of relative similarity and test whether a first candidate model generates a data sample significantly closer to a reference validation set.Subsequently, the second part of the thesis focuses on developing a novel non-parametric statistical hypothesis test for relative dependency. Tests of dependence are important tools in statistical analysis, and several canonical tests for the existence of dependence have been developed in the literature. However, the question of whether there exist dependencies is secondary. The determination of whether one dependence is stronger than another is frequently necessary for decision making. We present a statistical test which determine whether one variables is significantly more dependent on a first target variable or a second.Finally, a novel method for structure discovery in a graphical model is proposed. Making use of a result that zeros of a precision matrix can encode conditional independencies, we develop a test that estimates and bounds an entry of the precision matrix. Methods for structure discovery in the literature typically make restrictive distributional (e.g. Gaussian) or sparsity assumptions that may not apply to a data sample of interest. Consequently, we derive a new test that makes use of results for U-statistics and applies them to the covariance matrix, which then implies a bound on the precision matrix
Kellner, Jérémie. "Gaussian models and kernel methods." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10177/document.
Повний текст джерелаKernel methods have been extensively used to transform initial datasets by mapping them into a so-called kernel space or RKHS, before applying some statistical procedure onto transformed data. In particular, this kind of approach has been explored in the literature to try and make some prescribed probabilistic model more accurate in the RKHS, for instance Gaussian mixtures for classification or mere Gaussians for outlier detection. Therefore this thesis studies the relevancy of such models in kernel spaces.In a first time, we focus on a family of parameterized kernels - Gaussian RBF kernels - and study theoretically the distribution of an embedded random variable in a corresponding RKHS. We managed to prove that most marginals of such a distribution converge weakly to a so-called ''scale-mixture'' of Gaussians - basically a Gaussian with a random variance - when the parameter of the kernel tends to infinity. This result is used in practice to device a new method for outlier detection.In a second time, we present a one-sample test for normality in an RKHS based on the Maximum Mean Discrepancy. In particular, our test uses a fast parametric bootstrap procedure which circumvents the need for re-estimating Gaussian parameters for each bootstrap replication
Ozier-Lafontaine, Anthony. "Kernel-based testing and their application to single-cell data." Electronic Thesis or Diss., Ecole centrale de Nantes, 2023. http://www.theses.fr/2023ECDN0025.
Повний текст джерелаSingle-cell technologies generate data at the single-cell level. They are coumposed of hundreds to thousands of observations (i.e. cells) and tens of thousands of variables (i.e. genes). New methodological challenges arose to fully exploit the potentialities of these complex data. A major statistical challenge is to distinguish biological informationfrom technical noise in order to compare conditions or tissues. This thesis explores the application of kernel testing on single-cell datasets in order to detect and describe the potential differences between compared conditions.To overcome the limitations of existing kernel two-sample tests, we propose a kernel test inspired from the Hotelling-Lawley test that can apply to any experimental design. We implemented these tests in a R and Python package called ktest that is their first useroriented implementation. We demonstrate the performances of kernel testing on simulateddatasets and on various experimental singlecell datasets. The geometrical interpretations of these methods allows to identify the observations leading a detected difference. Finally, we propose a Nyström-based efficient implementationof these kernel tests as well as a range of diagnostic and interpretation tools
Bouyrie, Mathieu. "Restauration d'images de noyaux cellulaires en microscopie 3D par l'introduction de connaissance a priori." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLA032/document.
Повний текст джерелаIn this this document, we present a method to denoise 3D images acquired by 2-photon microscopy and displaying cell nuclei of animal embryos. The specimens are observed in toto and in vivo during their early development. Image deterioration can be explained by the microscope optical flaws, the acquisition system limitations, and light absorption and diffusion through the tissue depth.The proposed method is a 3D adaptation of a 2D method so far applied to astronomical images and it also differs from state-of the of-the-art methods by the introduction of priors on the biological data. Our hypotheses include assuming that noise statistics are Mixed Poisson Gaussian (MPG) and that cell nuclei are quasi spherical.To implement our method in 3D, we had to take into account the sampling grid dimensions which are different in the x, y or z directions. A spherical object imaged on this grid loses this property. To deal with such a grid, we had to interpret the filtering process, which is a core element of the original theory, as a diffusion process
Massiot, Gaspar. "Quelques Problèmes de Statistique autour des processus de Poisson." Thesis, Rennes, École normale supérieure, 2017. http://www.theses.fr/2017ENSR0006/document.
Повний текст джерелаThe main purpose of this thesis is to develop statistical methodologies for stochastic processes data and more precisely Cox process data.The problems considered arise from three different contexts: nonparametric tests, nonparametric kernel estimation and minimax estimation.We first study the statistical test problem of detecting wether a Cox process is Poisson or not.Then, we introduce a semiparametric estimate of the regression over a Poisson point process. Using Itô’s famous chaos expansion for Poisson functionals, we derive asymptotic minimax properties of our estimator.Finally, we introduce a nonparametric estimate of the intensity of a Cox process whenever it is a deterministic function of a known coprocess
Penin, Rémi. "Evaluation à priori des performances environnementales d'un noyau magnétique de transformateur triphasé sur la base de tests simplifiés." Thesis, Artois, 2014. http://www.theses.fr/2014ARTO0209/document.
Повний текст джерелаThe transformer is now a static converter most notably used in electrical distribution. The electrical steel sheet used in the construction of their magnetic circuits have become more efficient to reduce losses occurred. However, standardized tests to characterize the electromagnetic steel do not fully reflect the energy behavior of the transformer. In addition, another issue has gained importance in recent years: the acoustic noise. Unfortunately, there is no link between the quality of grain oriented steel selected to construct the magnetic circuit and acoustic noise that will produce it. The objective of this thesis is to answer this dual problem from simplified test. Indeed, many experimental devices and methodologies have been developed such as the method of three frames, to study the distribution of core losses in the transformer, the magnetic circuits shifted, to study phenomena at the origin of acoustic noise, and models of single and three phase transformers. In addition, numerical simulations were performed to deepen our analysis of the experimental results. The study of the devices have allowed to identify three parameters relating to the quality of grain oriented electrical steel, resulting from differences in the distribution of the flux density and therefore, first, the differences in distribution of core loss and, hand, acoustic noise in transformers
Fortier, Steven. "Estimation du biais de la copule conditionnelle pour un test d'indépendance conditionnelle." Mémoire, Université de Sherbrooke, 2015. http://hdl.handle.net/11143/7518.
Повний текст джерелаChebana, Fateh. "Estimation et tests par des méthodes fonctionnelles : applications aux M-estimateurs et aux tests de Bickel-Rosenblatt." Paris 6, 2003. http://www.theses.fr/2003PA066517.
Повний текст джерелаNguyen, Van Hanh. "Modèles de mélange semi-paramétriques et applications aux tests multiples." Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00987035.
Повний текст джерелаSaumard, Mathieu. "Contribution à l'analyse statistique des données fontionnelles." Thesis, Rennes, INSA, 2013. http://www.theses.fr/2013ISAR0009/document.
Повний текст джерелаIn this thesis, we are interested in the functional data. The problem of estimation in a model of estimating equations is studying. We derive a central limit type theorem for the considered estimator. The optimal instruments are estimated, and we obtain a uniform convergence of the estimators. We are then interested in various testing with functional data. We study the problem of nonparametric testing for the effect of a random functional covariate on an error term which could be directly observed as a response or estimated from a functional model like for instance the functional linear model. We proved, in order to construct the tests, a result of dimension reduction which relies on projections of the functional covariate. We have constructed no-effect tests by using a kernel smoothing or a nearest neighbor smoothing. A goodness-of-fit test in the functional linear model is also proposed. All these tests are studied from a theoretical and practical perspective
Частини книг з теми "Tests à noyaux"
LASOCKI, Stanisław. "Estimation de la densité par noyau en sismologie." In Méthodes et modèles statistiques pour la sismogenèse, 5–31. ISTE Group, 2023. http://dx.doi.org/10.51926/iste.9037.ch1.
Повний текст джерелаYılmaz, Tugay. "Sporun Bireylerin Akıllı Telefon Kullanımına Etkisinin İncelenmesi." In Spor Bilimleri Üzerine Araştırmalar-VI. Özgür Yayınları, 2023. http://dx.doi.org/10.58830/ozgur.pub246.c1065.
Повний текст джерелаТези доповідей конференцій з теми "Tests à noyaux"
Noya, M., H. Celleri, E. Camilion, A. Caneiro, A. Floridia, C. G. Grasetti, J. I. Ramallo, and M. C. Fuertes. "Nanoindentation Characterization of Vaca Muerta Formation Shale Rocks and Its Relation to Geomechanical Model and Core Plugs Properties." In 57th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2023. http://dx.doi.org/10.56952/arma-2023-0758.
Повний текст джерелаЗвіти організацій з теми "Tests à noyaux"
Catherine, Hugo. Étude comparative des services nationaux de données de recherche Facteurs de réussite. Ministère de l'enseignement supérieur et de la recherche, January 2021. http://dx.doi.org/10.52949/6.
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