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Dissertations / Theses on the topic 'Geometrisk statistik'

Author: Grafiati

Published: 22 June 2024

Last updated: 31 July 2025

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1

Pedersen, Morten Akhøj. "Méthodes riemanniennes et sous-riemanniennes pour la réduction de dimension." Electronic Thesis or Diss., Université Côte d'Azur, 2023. http://www.theses.fr/2023COAZ4087.

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Nous proposons dans cette thèse de nouvelles méthodes de réduction de dimension fondées sur la géométrie différentielle. Il s'agit de trouver une représentation d'un ensemble d'observations dans un espace de dimension inférieure à l'espace d'origine des données. Les méthodes de réduction de dimension constituent la pierre angulaire des statistiques et ont donc un très large éventail d'applications. Dans les statistiques euclidiennes ordinaires, les données appartiennent à un espace vectoriel et l'espace de dimension inférieure peut être un sous-espace linéaire ou une sous-variété non linéaire

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2

Saive, Yannick. "DirCNN: Rotation Invariant Geometric Deep Learning." Thesis, KTH, Matematisk statistik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-252573.

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Recently geometric deep learning introduced a new way for machine learning algorithms to tackle point cloud data in its raw form. Pioneers like PointNet and many architectures building on top of its success realize the importance of invariance to initial data transformations. These include shifting, scaling and rotating the point cloud in 3D space. Similarly to our desire for image classifying machine learning models to classify an upside down dog as a dog, we wish geometric deep learning models to succeed on transformed data. As such, many models employ an initial data transform in their mode

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3

Granquist, Daniel. "Genom statistisk analys utvärdera geometriska parametrars påverkan på ett XPI- cylinderhuvuds snurrtal." Thesis, KTH, Maskinkonstruktion (Inst.), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-99453.

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This Master Thesis is a product development project that has been carried out in cooperation with Scania CV AB. The purpose has been to find the relationship between geometric parameters and the swirl number for an XPI- cylinder head in order to improve the design specification. The increased focus on environmental issues from society leads to tighter emission legislations for the truck manufactures. In order to drive the development forward considerable resources are spent on research and development on diesel engines and its combustion process. The inlet air has a significant impact on the f

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4

Ho, Pak-kei. "Parametric and non-parametric inference for Geometric Process." Click to view the E-thesis via HKUTO, 2005. http://sunzi.lib.hku.hk/hkuto/record/B31483859.

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5

Ho, Pak-kei, and 何柏基. "Parametric and non-parametric inference for Geometric Process." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B31483859.

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6

Keil, Mitchel J. "Automatic generation of interference-free geometric models of spatial mechanisms." Diss., This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-08252008-162631/.

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7

Schäfer, Philip Morten [Verfasser]. "Statistics, Geometries and Scaling Laws of Streamlines and Streamline Segments in Turbulent Flows / Philip Morten Schäfer." Aachen : Shaker, 2013. http://d-nb.info/105157398X/34.

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8

SCHIAVON, JACOPO. "Geometria differenziale delle matrici simmetriche e definite positive per applicazioni statistiche." Doctoral thesis, Università degli studi di Padova, 2022. http://hdl.handle.net/11577/3449438.

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La geometria differenziale è un insieme di strumenti che permette di compiere le tipiche operazioni di algebra e calcolo anche in spazi che non seguono le normali regole Euclidee degli spazi vettoriali, ad esempio come i punti di una superficie curva. Questo campo della matematica sta assumendo sempre maggiore rilevanza in vari ambiti, fra cui statistica e machine learning, a causa dell’enorme disponibilità di dati che appartengono a domini sempre più complessi. Un esempio di dominio di questo tipo è l’insieme delle matrici simmetriche e definite positive, ovvero le matrici di covarianza, che

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9

Suttmiller, Alexander Gage. "Streamline Feature Detection: Geometric and Statistical Evaluation of Streamline Properties." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1315967677.

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10

Villa, E. "Methods of geometric measure theory in stochastic geometry." Doctoral thesis, Università degli Studi di Milano, 2007. http://hdl.handle.net/2434/28369.

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All the results of the present thesis have been obtained facing problems related to the study of the so called birth-and-growth stochastic processes, relevant in several real applications, like crystallization processes, tumour growth, angiogenesis, etc. We have introduced a Delta formalism, à la Dirac-Schwartz, for the description of random measures associated with random closed sets in R^d of lower dimensions, such that the usual Dirac delta at a point follows as particular case, in order to provide a natural framework for deriving evolution equations for mean densities at integer Hausdorff

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11

Saha, Abhijoy. "A Geometric Framework for Modeling and Inference using the Nonparametric Fisher–Rao metric." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1562679374833421.

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12

Chu, Chi-Yang. "Applied Nonparametric Density and Regression Estimation with Discrete Data| Plug-In Bandwidth Selection and Non-Geometric Kernel Functions." Thesis, The University of Alabama, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10262364.

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<p> Bandwidth selection plays an important role in kernel density estimation. Least-squares cross-validation and plug-in methods are commonly used as bandwidth selectors for the continuous data setting. The former is a data-driven approach and the latter requires <i>a priori</i> assumptions about the unknown distribution of the data. A benefit from the plug-in method is its relatively quick computation and hence it is often used for preliminary analysis. However, we find that much less is known about the plug-in method in the discrete data setting and this motivates us to propose a plug-in ban

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13

Lemdiasov, Rostislav A. "A general purpose computational approach to the design of gradient coils for arbitrary geometries." Worcester, Mass. : Worcester Polytechnic Institute, 2004. http://www.wpi.edu/Pubs/ETD/Available/etd-09214-155502/.

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14

Karangwa, Innocent. "Comparing South African financial markets behaviour to the geometric Brownian Motion Process." Thesis, University of the Western Cape, 2008. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_4787_1363778247.

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<p>This study examines the behaviour of the South African financial markets with regards to the Geometric Brownian motion process. It uses the daily, weekly, and monthly stock returns time series of some major securities trading in the South African financial market, more specifically the US dollar/Euro, JSE ALSI Total Returns Index, South African All Bond Index, Anglo American Corporation, Standard Bank, Sasol, US dollar Gold Price , Brent spot oil price, and South African white maize near future. The assumptions underlying the&nbsp<br>Geometric Brownian motion in finance, namely the stationa

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15

Klíma, Ondřej. "Rekonstrukce tvaru polygonálních modelů." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2013. http://www.nusl.cz/ntk/nusl-412883.

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The thesis is focussed on the reconstruction of a damaged skull represented by a polygonal model. The reconstruction is based on a statistical shape model of the skull. The thesis covers the registration of skulls by using a thin-plate spline method, aligning polygonal models by generalized procrustes analysis, the identification of missing parts of a skull by means of statistical shape models outliers analysis. Finally, missing parts of the skull are reconstructed and the accuracy of the reconstruction is estimated.

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16

Porto, Julianna Pinele Santos 1990. "Geometria da informação : métrica de Fisher." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/307256.

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Orientador: João Eloir Strapasson<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Matemática Estatística e Computação Científica<br>Made available in DSpace on 2018-08-23T13:44:50Z (GMT). No. of bitstreams: 1 Porto_JuliannaPineleSantos_M.pdf: 2346170 bytes, checksum: 9f8b7284329ef1eb2f319c2e377b7a3c (MD5) Previous issue date: 2013<br>Resumo: A Geometria da Informação é uma área da matemática que utiliza ferramentas geométricas no estudo de modelos estatísticos. Em 1945, Rao introduziu uma métrica Riemanniana no espaço das distribuições de probabilidade usando a ma

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17

Matuonto, I. "LAWS OF LARGE NUMBERS AND CENTRAL LIMIT THEOREMS FOR RANDOM GEOMETRIC MEASURES. A COMPUTATIONAL APPROACH." Doctoral thesis, Università degli Studi di Milano, 2010. http://hdl.handle.net/2434/150202.

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The aim of this thesis is to produce computational experiments related to a Central Limit Theorem (CLT) for random measures proved by Penrose in [4]. In particular we analyze some random measures associated with a segment process, a Voronoi tessellation and a Johnson-Mehl tessellation constructed on an underlying 2-dimensional point process. In the result by Penrose, this point process is supposed to be Poisson non-homogeneous (or Binomial, but we are not going to study this case). In this thesis, we also consider the case of an underlying Neyman-Scott cluster process. The main references

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18

West, Amie October. "Something is Askew in Florida's Water: Arguing for a Better Descriptive Statistic for Positively Skewed Water-Quality Data." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4254.

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ABSTRACT It may be of no surprise that water quality data is right-skewed, but what appears to be overlooked by some is that the arithmetic mean and standard deviation most often fail as measures of central tendency in skewed data. When using the arithmetic mean and arithmetic standard deviation with nutrient data, one standard deviation about the arithmetic mean can capture nearly all of the data and extend into negative values. Representing nutrient data this way can be misleading to viewers who are using the statistics, and making assumptions, to understand the characteristics of those wate

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19

Prieto, Bernal Juan Carlos. "Multiparametric organ modeling for shape statistics and simulation procedures." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0010/document.

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La modélisation géométrique a été l'un des sujets les plus étudiés pour la représentation des structures anatomiques dans le domaine médical. Aujourd'hui, il n'y a toujours pas de méthode bien établie pour modéliser la forme d'un organe. Cependant, il y a plusieurs types d'approches disponibles et chaque approche a ses forces et ses faiblesses. La plupart des méthodes de pointe utilisent uniquement l'information surfacique mais un besoin croissant de modéliser l'information volumique des objets apparaît. En plus de la description géométrique, il faut pouvoir différencier les objets d'une popul

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20

Riou-Durand, Lionel. "Theoretical contributions to Monte Carlo methods, and applications to Statistics." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLG006/document.

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La première partie de cette thèse concerne l'inférence de modèles statistiques non normalisés. Nous étudions deux méthodes d'inférence basées sur de l'échantillonnage aléatoire : Monte-Carlo MLE (Geyer, 1994), et Noise Contrastive Estimation (Gutmann et Hyvarinen, 2010). Cette dernière méthode fut soutenue par une justification numérique d'une meilleure stabilité, mais aucun résultat théorique n'avait encore été prouvé. Nous prouvons que Noise Contrastive Estimation est plus robuste au choix de la distribution d'échantillonnage. Nous évaluons le gain de précision en fonction du budget computat

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21

Romon, Gabriel. "Contributions to high-dimensional, infinite-dimensional and nonlinear statistics." Electronic Thesis or Diss., Institut polytechnique de Paris, 2023. http://www.theses.fr/2023IPPAG013.

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Trois problèmes sont abordés dans cette thèse: l'inférence en régression multi-tâche de grande dimension, les quantiles géométriques dans les espaces normés de dimension infinie, et les moyennes de Fréchet généralisées dans les arbres métriques. Premièrement, nous considérons un modèle de régression multi-tâche avec une hypothèse de sparsité sur les lignes de la matrice paramètre. L'estimation est faite en haute dimension avec l'estimateur Lasso multi-tâche. Afin de corriger le biais induit par la pénalité, nous introduisons un nouvel objet dépendant uniquement des données que nous appelons ma

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22

Carriere, Mathieu. "On Metric and Statistical Properties of Topological Descriptors for geometric Data." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS433/document.

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Dans le cadre de l'apprentissage automatique, l'utilisation de représentations alternatives, ou descripteurs, pour les données est un problème fondamental permettant d'améliorer sensiblement les résultats des algorithmes. Parmi eux, les descripteurs topologiques calculent et encodent l'information de nature topologique contenue dans les données géométriques. Ils ont pour avantage de bénéficier de nombreuses bonnes propriétés issues de la topologie, et désirables en pratique, comme par exemple leur invariance aux déformations continues des données. En revanche, la structure et les opérations né

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23

Dai, Xiaogang. "Score Test and Likelihood Ratio Test for Zero-Inflated Binomial Distribution and Geometric Distribution." TopSCHOLAR®, 2018. https://digitalcommons.wku.edu/theses/2447.

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The main purpose of this thesis is to compare the performance of the score test and the likelihood ratio test by computing type I errors and type II errors when the tests are applied to the geometric distribution and inflated binomial distribution. We first derive test statistics of the score test and the likelihood ratio test for both distributions. We then use the software package R to perform a simulation to study the behavior of the two tests. We derive the R codes to calculate the two types of error for each distribution. We create lots of samples to approximate the likelihood of type I

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24

Riou-Durand, Lionel. "Theoretical contributions to Monte Carlo methods, and applications to Statistics." Electronic Thesis or Diss., Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLG006.

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La première partie de cette thèse concerne l'inférence de modèles statistiques non normalisés. Nous étudions deux méthodes d'inférence basées sur de l'échantillonnage aléatoire : Monte-Carlo MLE (Geyer, 1994), et Noise Contrastive Estimation (Gutmann et Hyvarinen, 2010). Cette dernière méthode fut soutenue par une justification numérique d'une meilleure stabilité, mais aucun résultat théorique n'avait encore été prouvé. Nous prouvons que Noise Contrastive Estimation est plus robuste au choix de la distribution d'échantillonnage. Nous évaluons le gain de précision en fonction du budget computat

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25

Sundberg, Rikard. "Matematiklärares användning av digital teknik och dynamisk programvara i grundskolan : Möjligheter och hinder för användandet i undervisningen." Thesis, Högskolan Dalarna, Pedagogiskt arbete, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:du-27465.

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Studien undersöker vilka digitala resurser som matematiklärare använder i matematikundervisningen i grundskolan, möjligheter samt hinder. Då digitala resurser kan nyttjas på olika nivåer analyseras även vilken nivå som undervisningen ligger på. Fokus har varit att identifiera lärare som använder dynamiska programvaror och/eller digital teknik. Studien är en fallstudie, genomförd genom en inledande enkät för att identifiera lärare att intervjua. Efter intervjuer har de aktiviteter som lärare anger att de använder digitala resurser till eller ser möjligheter i analyserats för att se på vilken ni

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26

Neeser, Rudolph. "A Comparison of Statistical and Geometric Reconstruction Techniques: Guidelines for Correcting Fossil Hominin Crania." Thesis, University of Cape Town, 2007. http://pubs.cs.uct.ac.za/archive/00000413/.

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The study of human evolution centres, to a large extent, around the study of fossil morphology, including the comparison and interpretation of these remains within the context of what is known about morphological variation within living species. However, many fossils suffer from environmentally caused damage (taphonomic distortion) which hinders any such interpretation: fossil material may be broken and fragmented while the weight and motion of overlaying sediments can cause their plastic distortion. To date, a number of studies have focused on the reconstruction of such taphonomically dama

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27

Xie, Weiyi. "A Geometric Approach to Visualization of Variability in Univariate and Multivariate Functional Data." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1500348052174345.

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28

Ballani, Felix. "Beiträge zur Theorie und Anwendung von Keim-Korn-Modellen mit konvexen Körnern." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola&quot, 2009. http://nbn-resolving.de/urn:nbn:de:swb:105-7665778.

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Gegenstand der Arbeit sind zufällige Mengen $Xi$ aus dem erweiterten Konvexring und zugehörige markierte Punktprozesse $Psi$ in $mathbb{R}^d$ mit Marken aus dem System der konvexen Körper. Es wird gezeigt, unter welchen Voraussetzungen an $Psi$ die zweite Produktdichte $varrho_S^{(2)}$ des durch $Xi$ induzierten zufälligen Oberflächenmaßes $S_{Xi}$ existiert und eine klassische Beziehung zwischen der Intensitätsfunktion von $S_{Xi}$ und der Ableitung der sphärischen Kontaktverteilungsfunktion von $Xi$ bei Null auf entsprechende Größen zweiter Ordnung übertragen werden kann. Mit Hilfe des so er

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29

Helfgott, Michel. "Calculus of One Variable: An Eclectic Approach." Digital Commons @ East Tennessee State University, 2012. http://amzn.com/1477633871.

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This textbook is intended for a two-semester course on calculus of one variable. The target audience is comprised of first-year students in biology, chemistry, physics and other related disciplines. The title of the book reflects the fact that it is not limited to one single approach to calculus. Rather, we use graphing calculators or applications whenever they are necessary to introduce certain topics. Nonetheless, as expected, a conceptual framework permeates the whole book. A distinctive characteristic of the book is the early introduction of sequences and geometric series, and a gradual de

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30

Lauria, Gabriele. "The Human Biodiversity in the Middle of the Mediterranean. Study of native and settlers populations on the Sicilian context." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/159789.

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[IT] Negli ultimi 200.000 anni, la specie umana si è diffusa in tutta la Terra, adattando la sua morfologia e fisiologia a un'ampia gamma di habitat. Lo scheletro umano ha quindi registrato i principali effetti ambientali e di conseguenza i reperti scheletrici assumono grande importanza nell'indagine dei processi evolutivi. Oggi le moderne tecniche di indagini quantitative delle principali caratteristiche morfologiche consentono di metterle in relazione con la variabilità genetica. La posizione geografica della Sicilia, l'isolamento e la sua lunga e dinamica storia di colonizzazione (diversi e

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31

Sánchez, Trigueros Fernando. "Geospatial patterns in the late pleistocene human settlement of the Sierra de Atapuerca (Burgos, Spain): spatial association, geometric probability and fuzzy statistics in the study of past land-use strategies." Doctoral thesis, Universitat Rovira i Virgili, 2013. http://hdl.handle.net/10803/125660.

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La presente tesis doctoral se centra en el diseño, implementación y aplicación de técnicas probalbilísticas y estadísticas para el análisis espacial y la evaluación de la incertidumbre, en el contexto de un problema de palaeoecología humana. La razón técnica de tal estrategia de investigación se debe a que los patrones de datos arqueológicos han sido afectados por procesos tafonómicos y por restricciones a la captura de datos, los cuales pueden identificarse pero no reconstruirse con total certidumbre. En la definición de problemáticas específicas a partir de tales cuestiones fijamos tres obje

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32

Shabarshova, Liudmila. "Geometric functional pruning for change point detection in low-dimensional exponential family models." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASM026.

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La détection de ruptures est un problème courant d'apprentissage non supervisé dans de nombreux domaines d'application, notamment en biologie, en génomique, en surveillance de réseaux de capteurs et en cybersécurité. En général, soit une détection de ruptures a posteriori, c'est-à-dire hors ligne, soit une détection de ruptures séquentielle, c'est-à-dire en ligne, est envisagée.Des méthodes standard de programmation dynamique pour la détection de ruptures ont été proposées pour optimiser le logarithme du rapport de vraisemblance. Ces méthodes sont exactes et récupèrent des segmentations optima

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33

Rambelli, Daniela. "Sviluppo di un modello matematico per l'analisi della conformità geometrica del laminato nel processo di laminazione a caldo ed influenza sulle fasi di processo successive." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6902/.

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Sviluppo di un modello che fornisce l'analisi numerica dei parametri che definiscono il profilo del laminato a caldo piano e il relativo output grafico. Il modello è utilizzato per indagare l'incidenza del difetto "canale di laminazione" e per identificare le specifiche di acquisto della materia prima per l'azienda. Vengono infine proposte alcune tecniche di controllo statistico di processo, per tenere monitorate le caratteristiche della materia prima in ingresso.

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34

Mora, Marianne. "Sur la geometrie differentielle en statistique : sur la convergence des suites de fonctions variance des familles exponentielles naturelles." Toulouse 3, 1988. http://www.theses.fr/1988TOU30044.

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La these comporte deux parties independantes. La premiere partie traite de l'utilisation de la geometrie differentielle en statistique. Dans les chapitres i et ii sont rappelees les notions fondamentales de geometrie differentielle et de statistique. Le chapitre iii est consacre a la theorie des "strings" dont de nombreux exemples apparaissent en statistique inferentielle. Ce nouveau concept a ete introduit et etudie par m. M. O. E. Barndorff nielsen et p. Blaesild. Nous en donnons ici une nouvelle definition, purement mathematique, basee sur un concept de differenciation d'ordre superieur, le

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Slezak, Thomas Joseph. "Quantitative Morphological Classification of Planetary Craterforms Using Multivariate Methods of Outline-Based Shape Analysis." BYU ScholarsArchive, 2017. https://scholarsarchive.byu.edu/etd/6639.

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Craters formed by impact and volcanic processes are among the most fundamental planetary landforms. This study examines the morphology of diverse craterforms on Io, the Moon, Mars, and Earth using quantitative, outline-based shape analysis and multivariate statistical methods to evaluate the differences between different types of. Ultimately, this should help establish relationships between the form and origin of craterforms. Developed in the field of geometric morphometrics by paleontological and biological sciences communities, these methods were used for the analysis of the shapes of crater

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Olsen, Andrew Nolan. "When Infinity is Too Long to Wait: On the Convergence of Markov Chain Monte Carlo Methods." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1433770406.

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37

Siu, Daniel. "Stochastic Hybrid Dynamic Systems: Modeling, Estimation and Simulation." Scholar Commons, 2012. http://scholarcommons.usf.edu/etd/4405.

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Stochastic hybrid dynamic systems that incorporate both continuous and discrete dynamics have been an area of great interest over the recent years. In view of applications, stochastic hybrid dynamic systems have been employed to diverse fields of studies, such as communication networks, air traffic management, and insurance risk models. The aim of the present study is to investigate properties of some classes of stochastic hybrid dynamic systems. The class of stochastic hybrid dynamic systems investigated has random jumps driven by a non-homogeneous Poisson process and deterministic jumps trig

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38

Mustafa, Nabil. "Approximations of Points: Combinatorics and Algorithms." Habilitation à diriger des recherches, Université Paris-Est, 2013. http://tel.archives-ouvertes.fr/tel-01062825.

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At the core of successful manipulation and computation over large geometric data is the notion of approximation, both structural and computational. The focus of this thesis will be on the combinatorial and algorithmic aspects of approximations of point-set data P in d-dimensional Euclidean space. It starts with a study of geometric data depth where the goal is to compute a point which is the 'combinatorial center' of P. Over the past 50 years several such measures of combinatorial centers have been proposed, and we will re-examine several of them: Tukey depth, Simplicial depth, Oja depth and R

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Rodriguez, Joan Neylo da Cruz. "Análise geoestatística multi-pontos." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/45/45133/tde-20092013-113449/.

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Estimativa e simulação baseados na estatística de dois pontos têm sido usadas desde a década de 1960 na análise geoestatístico. Esses métodos dependem do modelo de correlação espacial derivado da bem conhecida função semivariograma. Entretanto, a função semivariograma não pode descrever a heterogeneidade geológica encontrada em depósitos minerais e reservatórios de petróleo. Assim, ao invés de usar a estatística de dois pontos, a geoestatística multi-pontos, baseada em distribuições de probabilidade de múltiplo pontos, tem sido considerada uma alternativa confiável para descrição da heterogene

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Chung, François. "Modélisation de l'apparence de régions pour la segmentation d'images basée modèle." Phd thesis, École Nationale Supérieure des Mines de Paris, 2011. http://pastel.archives-ouvertes.fr/pastel-00575796.

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Cette thèse est consacrée à un nouveau modèle d'apparence pour la segmentation d'images basée modèle. Ce modèle, dénommé Multimodal Prior Appearance Model (MPAM), est construit à partir d'une classification EM de profils d'intensité combinée avec une méthode automatique pour déterminer le nombre de classes. Contrairement aux approches classiques basées ACP, les profils d'intensité sont classifiés pour chaque maillage et non pour chaque sommet. Tout d'abord, nous décrivons la construction du MPAM à partir d'un ensemble de maillages et d'images. La classification de profils d'intensité et la dét

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Zhang, Han. "Detecting Rare Haplotype-Environmental Interaction and Nonlinear Effects of Rare Haplotypes using Bayesian LASSO on Quantitative Traits." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu149969433115895.

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Godichon-Baggioni, Antoine. "Algorithmes stochastiques pour la statistique robuste en grande dimension." Thesis, Dijon, 2016. http://www.theses.fr/2016DIJOS053/document.

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Cette thèse porte sur l'étude d'algorithmes stochastiques en grande dimension ainsi qu'à leur application en statistique robuste. Dans la suite, l'expression grande dimension pourra aussi bien signifier que la taille des échantillons étudiés est grande ou encore que les variables considérées sont à valeurs dans des espaces de grande dimension (pas nécessairement finie). Afin d'analyser ce type de données, il peut être avantageux de considérer des algorithmes qui soient rapides, qui ne nécessitent pas de stocker toutes les données, et qui permettent de mettre à jour facilement les estimations.

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Mamic, G. J. "Representation and recognition of 3-D free-form objects incorporating statistical techniques." Thesis, Queensland University of Technology, 2002.

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Mulatier, Clélia de. "A random walk approach to stochastic neutron transport." Thesis, Université Paris-Saclay (ComUE), 2015. http://www.theses.fr/2015SACLS029/document.

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L’un des principaux objectifs de la physique des réacteurs nucléaires est de caractériser la répartition aléatoire de la population de neutrons au sein d’un réacteur. Les fluctuations de cette population sont liées à la nature stochastique des interactions des neutrons avec les noyaux fissiles du milieu : diffusion, capture stérile, ou encore émission de plusieurs neutrons lors de la fission d’un noyau. L’ensemble de ces mécanismes physiques confère une structure aléatoire branchante à la trajectoire des neutrons, alors modélisée par des marches aléatoires. Avec environs 10⁸ neutrons par centi

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Da, Silva Sébastien. "Fouille de données spatiales et modélisation de linéaires de paysages agricoles." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0156/document.

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Cette thèse s'inscrit dans un partenariat entre l'INRA et l'INRIA et dans le champs de l'extraction de connaissances à partir de bases de données spatiales. La problématique porte sur la caractérisation et la simulation de paysages agricoles. Plus précisément, nous nous concentrons sur des lignes qui structurent le paysage agricole, telles que les routes, les fossés d'irrigation et les haies. Notre objectif est de modéliser les haies en raison de leur rôle dans de nombreux processus écologiques et environnementaux. Nous étudions les moyens de caractériser les structures de haies sur deux paysa

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Studeny, Angelika C. "Quantifying biodiversity trends in time and space." Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/3414.

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The global loss of biodiversity calls for robust large-scale diversity assessment. Biological diversity is a multi-faceted concept; defined as the “variety of life”, answering questions such as “How much is there?” or more precisely “Have we succeeded in reducing the rate of its decline?” is not straightforward. While various aspects of biodiversity give rise to numerous ways of quantification, we focus on temporal (and spatial) trends and their changes in species diversity. Traditional diversity indices summarise information contained in the species abundance distribution, i.e. each species'

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Da, Silva Sébastien. "Fouille de données spatiales et modélisation de linéaires de paysages agricoles." Electronic Thesis or Diss., Université de Lorraine, 2014. http://docnum.univ-lorraine.fr/prive/DDOC_T_2014_0156_DA_SILVA.pdf.

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Cette thèse s'inscrit dans un partenariat entre l'INRA et l'INRIA et dans le champs de l'extraction de connaissances à partir de bases de données spatiales. La problématique porte sur la caractérisation et la simulation de paysages agricoles. Plus précisément, nous nous concentrons sur des lignes qui structurent le paysage agricole, telles que les routes, les fossés d'irrigation et les haies. Notre objectif est de modéliser les haies en raison de leur rôle dans de nombreux processus écologiques et environnementaux. Nous étudions les moyens de caractériser les structures de haies sur deux paysa

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Línek, Vítězslav. "Geometrie lineárního modelu." Doctoral thesis, 2016. http://www.nusl.cz/ntk/nusl-352099.

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The advantage of the geometric approach to linear model and its applications is known to many authors. In spite of that, it still remains to be rather unpopular in teaching statistics around the world and is almost missing in the Czech Republic. In this work, we use geometry of multidimensional vector spaces to derive some well-known properties of the linear model and to explain some of the most familiar statistical methods to show usefulness of this approach, also known as "free-coordinate". Besides, historical background including selected results of R. A. Fisher is briefly discussed; it fol

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Löwendick, Martin [Verfasser]. "On smoothing under bounds and geometric contraints / Martin Löwendick." 1999. http://d-nb.info/959981020/34.

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Subbulakshmi, S. "Geometric and analytic studies of some integrable systems." Thesis, 1998. http://hdl.handle.net/2009/1122.

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