Rozprawy doktorskie na temat „Estimation de normales”
Utwórz poprawne odniesienie w stylach APA, MLA, Chicago, Harvard i wielu innych
Sprawdź 50 najlepszych rozpraw doktorskich naukowych na temat „Estimation de normales”.
Przycisk „Dodaj do bibliografii” jest dostępny obok każdej pracy w bibliografii. Użyj go – a my automatycznie utworzymy odniesienie bibliograficzne do wybranej pracy w stylu cytowania, którego potrzebujesz: APA, MLA, Harvard, Chicago, Vancouver itp.
Możesz również pobrać pełny tekst publikacji naukowej w formacie „.pdf” i przeczytać adnotację do pracy online, jeśli odpowiednie parametry są dostępne w metadanych.
Przeglądaj rozprawy doktorskie z różnych dziedzin i twórz odpowiednie bibliografie.
Criticou, Doukissa. "Estimateurs à rétrécisseurs (cas de distributions normales) : une classe d'estimateurs bayesiens". Rouen, 1986. http://www.theses.fr/1986ROUES050.
Pełny tekst źródłaRieux, Frédéric. "Processus de diffusion discret : opérateur laplacien appliqué à l'étude de surfaces". Thesis, Montpellier 2, 2012. http://www.theses.fr/2012MON20201/document.
Pełny tekst źródłaThe context of discrete geometry is in Zn. We propose to discribe discrete curves and surfaces composed of voxels: how to compute classical notions of analysis as tangent and normals ? Computation of data on discrete curves use average mask. A large amount of works proposed to study the pertinence of those masks. We propose to compute an average mask based on random walk. A random walk starting from a point of a curve or a surface, allow to give a weight, the time passed on each point. This kernel allow us to compute average and derivative. The studied of this digital process allow us to recover classical notions of geometry on meshes surfaces, and give accuracy estimator of tangent and curvature. We propose a large field of applications of this approach recovering classical tools using in transversal communauty of discrete geometry, with a same theorical base
Charton, Jerome. "Etude de caractéristiques saillantes sur des maillages 3D par estimation des normales et des courbures discrètes". Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0333/document.
Pełny tekst źródłaWith the aim to improve and automate the object reproduction chainfrom acquisition to 3D printing .We sought to characterize the salience on 3D objectsmodeled by a 3D mesh structure. For this, we have a state of the art of estimatingdifferential properties methods, namely normal and curvature on discrete surfaces inthe form of 3D mesh. To compare the behavior of different methods, we took a set ofclassic benchmarks in the domain, which are : accuracy, convergence and robustnesswith respect to variations of the neighbourhood. For this, we have established atest protocol emphasizing these qualities. From this first comparision, it was foundthat all the existing methods have shortcomings as these criteria. In order to havean estimation of the differential properties more reliable and accurate we developedtwo new estimators
Caracotte, Jordan. "Reconstruction 3D par stéréophotométrie pour la vision omnidirectionnelle". Electronic Thesis or Diss., Amiens, 2021. http://www.theses.fr/2021AMIE0031.
Pełny tekst źródłaThis thesis focuses on the photometric stereo problem and the omnidirectional vision. The photometric stereo problem is a 3D-reconstruction technique which requires several pictures of a surface under different lighting conditions from a single point of view. The omnidirectional vision encompasses the devices and the rig of cameras that capture a large part of the environment around them in a single image. Following four decades of research in the photometric stereo literature and using the unified model for central projection cameras, we try to merge these research fields. We first focus on techniques for estimating the normals to the surface, and for integrating the depth gradients to retrieve the shape. Then, we introduce a new spherical irradiance equation that we use to solve the photometric stereo problem using two central projection cameras. The approach is validated using synthetic and real images from a perspective camera and a catadioptric imaging device. We later extends the approach to perform 3d-reconstruction by photometric stereo using twin-fisheye cameras. Finally, we study some limitations of the approch and we discuss the ways to overcome these limits
Terzakis, Demètre. "Estimateurs à rétrécisseurs (cas de distributions normales à variance connue à un facteur près) : contrôle de l'emploi de la différence entre l'observation et l'estimation des moindres carrés". Rouen, 1987. http://www.theses.fr/1987ROUES015.
Pełny tekst źródłaLemaire, Jacques. "Étude de propriétés asymptotiques en classification". Nice, 1990. http://www.theses.fr/1990NICE4379.
Pełny tekst źródłaValdivia, Paola Tatiana Llerena. "Correção de normais para suavização de nuvens de pontos". Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-19032014-145046/.
Pełny tekst źródłaIn the last years, surface denoising is a subject of intensive research in geometry processing. Most of the recent approaches for mesh denoising use a twostep scheme: normal filtering followed by a point updating step to match the corrected normals. In this work, we propose an adaptation of such two-step approaches for point-based surfaces, exploring three different weight schemes for filtering normals. Moreover, we also investigate three techniques for normal estimation, analyzing the impact of each normal estimation method in the whole point-set smoothing process. Towards a quantitative analysis, in addition to conventional visual comparison, we evaluate the effectiveness of different choices of implementation using two measures, comparing our results against state-of-art point-based denoising techniques. Keywords: surface smoothing; point-based surface; normal estimation; normal filtering.
Wage, Kathleen E. "Adaptive estimation of acoustic normal modes". Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/12096.
Pełny tekst źródłaGrip, Marcus. "Tyre Performance Estimation during Normal Driving". Thesis, Linköpings universitet, Fordonssystem, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-176558.
Pełny tekst źródłaFernandez-Abrevaya, Victoria. "Apprentissage à grande échelle de modèles de formes et de mouvements pour le visage 3D". Electronic Thesis or Diss., Université Grenoble Alpes, 2020. https://theses.hal.science/tel-03151303.
Pełny tekst źródłaData-driven models of the 3D face are a promising direction for capturing the subtle complexities of the human face, and a central component to numerous applications thanks to their ability to simplify complex tasks. Most data-driven approaches to date were built from either a relatively limited number of samples or by synthetic data augmentation, mainly because of the difficulty in obtaining large-scale and accurate 3D scans of the face. Yet, there is a substantial amount of information that can be gathered when considering publicly available sources that have been captured over the last decade, whose combination can potentially bring forward more powerful models.This thesis proposes novel methods for building data-driven models of the 3D face geometry, and investigates whether improved performances can be obtained by learning from large and varied datasets of 3D facial scans. In order to make efficient use of a large number of training samples we develop novel deep learning techniques designed to effectively handle three-dimensional face data. We focus on several aspects that influence the geometry of the face: its shape components including fine details, its motion components such as expression, and the interaction between these two subspaces.We develop in particular two approaches for building generative models that decouple the latent space according to natural sources of variation, e.g.identity and expression. The first approach considers a novel deep autoencoder architecture that allows to learn a multilinear model without requiring the training data to be assembled as a complete tensor. We next propose a novel non-linear model based on adversarial training that further improves the decoupling capacity. This is enabled by a new 3D-2D architecture combining a 3D generator with a 2D discriminator, where both domains are bridged by a geometry mapping layer.As a necessary prerequisite for building data-driven models, we also address the problem of registering a large number of 3D facial scans in motion. We propose an approach that can efficiently and automatically handle a variety of sequences while making minimal assumptions on the input data. This is achieved by the use of a spatiotemporal model as well as a regression-based initialization, and we show that we can obtain accurate registrations in an efficient and scalable manner.Finally, we address the problem of recovering surface normals from natural images, with the goal of enriching existing coarse 3D reconstructions. We propose a method that can leverage all available image and normal data, whether paired or not, thanks to a new cross-modal learning architecture. Core to our approach is a novel module that we call deactivable skip connections, which allows to transfer the local details from the image to the output surface without hurting the performance when autoencoding modalities, achieving state-of-the-art results for the task
Roux, Hannaline. "Construction and parameter estimation of wrapped normal models". Diss., University of Pretoria, 2019. http://hdl.handle.net/2263/77880.
Pełny tekst źródłaDissertation (MSc)--University of Pretoria, 2019.
Statistics
MSc
Unrestricted
Stephens, Matthew. "Bayesian methods for mixtures of normal distributions". Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242056.
Pełny tekst źródłaQumsiyeh, Sahar Botros. "Non-normal Bivariate Distributions: Estimation And Hypothesis Testing". Phd thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/12608941/index.pdf.
Pełny tekst źródłas t family. We use the method of modified maximum likelihood (MML) to find estimators of various parameters in each distribution. We perform a simulation study to show that our estimators are more efficient and robust than the LS estimators even for small sample sizes. We develop hypothesis testing procedures using the LS and the MML estimators. We show that the latter are more powerful and robust. Moreover, we give a comparison of our tests with another well known robust test due to Tiku and Singh (1982) and show that our test is more powerful. The latter is based on censored normal samples and is quite prominent (Lehmann, 1986). We also use our MML estimators to find a more efficient estimator of Mahalanobis distance. We give real life examples.
Rasoafaraniaina, Rondrotiana J. "Preliminary test estimation in uniformly locally and asymptotically normal models". Doctoral thesis, Universite Libre de Bruxelles, 2020. https://dipot.ulb.ac.be/dspace/bitstream/2013/312253/4/Contents.pdf.
Pełny tekst źródłaDoctorat en Sciences
info:eu-repo/semantics/nonPublished
Nogueira, Josà Ivan Mota. "Uma estimativa interior do gradiente para a equaÃÃo da curvatura mÃdia em variedades riemannianas". Universidade Federal do CearÃ, 2012. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=8636.
Pełny tekst źródłaDeduzimos uma estimativa interior do gradiente para a equaÃÃo da curvatura mÃdia para grÃficos de Killing em variedades riemanianas inspirado na tÃcnica de pertubaÃÃes normais devido a N. Korevaar.
We deduce an interior gradient estimate for the mean curvature equation for Killing graphs in Riemannian manifolds inspired by the normal perturbation technique due to N. Korevaar.
Eiesland, Ole Wostryck. "Estimating seabed velocities from normal modes". Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for petroleumsteknologi og anvendt geofysikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18514.
Pełny tekst źródłaCheevatanarak, Suchittra. "A Comparison of Multivariate Normal and Elliptical Estimation Methods in Structural Equation Models". Thesis, University of North Texas, 1999. https://digital.library.unt.edu/ark:/67531/metadc278401/.
Pełny tekst źródłaAl, Hassan Ahmad. "Estimation des lois extremes multivariees". Paris 6, 1988. http://www.theses.fr/1988PA066014.
Pełny tekst źródłaMatos, Larissa Avila 1987. "Modelos lineares e não lineares de efeitos mistos para respostas censuradas usando as distribuições normal e t-Student multivariadas". [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/306684.
Pełny tekst źródłaDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Matemática, Estatística e Computação Científica
Made available in DSpace on 2018-08-20T06:44:43Z (GMT). No. of bitstreams: 1 Matos_LarissaAvila_M.pdf: 2008810 bytes, checksum: 0aee0c4f4bbf58ba67490d26cdd300ba (MD5) Previous issue date: 2012
Resumo: Modelos mistos são geralmente usados para representar dados longitudinais ou de medidas repetidas. Uma complicação adicional surge quando a resposta é censurada, por exemplo, devido aos limites de quantificação do ensaio utilizado. Distribuições normais para os efeitos aleatórios e os erros residuais são geralmente assumidas, mas tais pressupostos fazem as inferências vulneráveis, 'a presença de outliers. Motivados por uma preocupação da sensibilidade para potenciais outliers ou dados com caudas mais pesadas do que a normal, pretendemos desenvolver nessa dissertação, inferência para modelos lineares e não lineares de efeito misto censurados (NLMEC / LMEC) com base na distribui ção t- Student multivariada, sendo uma alternativa flexível ao uso da distribuição normal correspondente. Propomos um algoritmo ECM para computar as estimativas de máxima verossimilhança para os NLMEC / LMEC. Este algoritmo utiliza expressões fechadas no passo-E, que se baseia em fórmulas para a média e a variância de uma distribui ção t-multivariada truncada. O algoritmo proposto é implementado, pacote tlmec do R. Também propomos aqui um algoritmo ECM exato para os modelos lineares e não lineares de efeito misto censurados, com base na distribuição normal multivariada, que nos permite desenvolver análise de influência local para modelos de efeito misto com base na esperança condicional da função log-verossilhança dos dados completos. Os procedimentos desenvolvidos são ilustrados com a análise longitudinal da carga viral do HIV, apresentada em dois estudos recentes sobre a AIDS
Abstract: Mixed models are commonly used to represent longitudinal or repeated measures data. An additional complication arises when the response is censored, for example, due to limits of quantification of the assay used. Normal distributions for random effects and residual errors are usually assumed, but such assumptions make inferences vulnerable to the presence of outliers. Motivated by a concern of sensitivity to potential outliers or data with tails longer-than-normal, we aim to develop in this dissertation inference for linear and nonlinear mixed effects models with censored response (NLMEC/LMEC) based on the multivariate Student-t distribution, being a flexible alternative to the use of the corresponding normal distribution. We propose an ECM algorithm for computing the maximum likelihood estimates for NLMEC/LMEC. This algorithm uses closed-form expressions at the E-step, which relies on formulas for the mean and variance of a truncated multivariate-t distribution. The proposed algorithm is implemented in the R package tlmec. We also propose here an exact ECM algorithm for linear and nonlinear mixed effects models with censored response based on the multivariate normal distribution, which enable us to developed local influence analysis for mixed effects models on the basis of the conditional expectation of the complete-data log-likelihood function. The developed procedures are illustrated with two case studies, involving the analysis of longitudinal HIV viral load in two recent AIDS studies
Mestrado
Estatistica
Mestre em Estatística
Fourdrinier, Dominique. "Deux extensions des résultats classiques sur les estimateurs à rétrécisseur : cas de rétrécisseurs non différentiables ; cas de lois à symétrie sphérique". Rouen, 1986. http://www.theses.fr/1986ROUES043.
Pełny tekst źródłaEren, Emrah. "Effect Of Estimation In Goodness-of-fit Tests". Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/2/12611046/index.pdf.
Pełny tekst źródłaMarkström, Ingemar. "Comparing normal estimation methods for the rendering of unorganized point clouds". Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-261598.
Pełny tekst źródłaYtnormaler är fundamentalt viktiga i datorgrafiktillämpningar som exempelvis datorseende, objektigenkänning och belysningsberäkningar. Det finns ett behov av snabba och precisa beräkningsmetoder för uppskattade normaler vid hanteringen av o-organiserade punktmoln. I denna uppsats presenteras undersökningen och implementationen av två olika sätt att beräkna normaler för punkter i o-organiserade punktmoln från grannskap av förbestämt antal. Två huvudkategorier av tester utfördes. Den första typen var visuell inspektion och den andra bestod av numerisk analys av både beräkning och de beräknade normalerna. Punktmolnen som användes för undersökningarna inkluderade matematiskt korrekta sfärer, kuber och koner, samt både regelbundet samplade och laserskannade verkliga punktmoln med miljontals punkter. Komplett Triangulering av grannar visade sig vara den föredragna metoden för små grannskap, motiverad av kortare beräkningstid och högkvalitativt resultat. När antalet använda grannar steg kunde en brytpunkt ses, där ett byte till principalkomponentanalys kunde motiveras, då resultatet var normaler av likvärdig kvalitet, men med fördelen av nära konstant körtid oberoende av antalet använda grannar.
Tang, Qi. "Comparison of Different Methods for Estimating Log-normal Means". Digital Commons @ East Tennessee State University, 2014. https://dc.etsu.edu/etd/2338.
Pełny tekst źródłaAkhter, A. S. "Estimating the parameters of the truncated normal distribution". Thesis, University of Essex, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.378366.
Pełny tekst źródłaMalsiner-Walli, Gertraud, Sylvia Frühwirth-Schnatter i Bettina Grün. "Identifying mixtures of mixtures using Bayesian estimation". Taylor & Francis, 2017. http://dx.doi.org/10.1080/10618600.2016.1200472.
Pełny tekst źródłaSadeghkhani, Abdolnasser. "Estimation d'une densité prédictive avec information additionnelle". Thèse, Université de Sherbrooke, 2017. http://hdl.handle.net/11143/11238.
Pełny tekst źródłaAbstract: In the context of Bayesian theory and decision theory, the estimation of a predictive density of a random variable represents an important and challenging problem. Typically, in a parametric framework, usually there exists some additional information that can be interpreted as constraints. This thesis deals with strategies and improvements that take into account the additional information, in order to obtain effective and sometimes better performing predictive densities than others in the literature. The results apply to normal models with a known or unknown variance. We describe Bayesian predictive densities for Kullback--Leibler, Hellinger, reverse Kullback-Leibler losses as well as for α--divergence losses and establish links with skew--normal densities. We obtain dominance results using several techniques, including expansion of variance, dual loss functions in point estimation, restricted parameter space estimation, and Stein estimation. Finally, we obtain a general result for the Bayesian estimator of a ratio of two exponential family densities.
Liang, Yuli. "Contributions to Estimation and Testing Block Covariance Structures in Multivariate Normal Models". Doctoral thesis, Stockholms universitet, Statistiska institutionen, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-115347.
Pełny tekst źródłaFahey, Sean O'Flaherty. "Parameter Estimation of Structural Systems Possessing One or Two Nonlinear Normal Modes". Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/29477.
Pełny tekst źródłaPh. D.
Bosman, Riëtte. "Threshold estimation in normal and impaired ears using Auditory Steady State Responses". Pretoria : [s.n.], 2003. http://upetd.up.ac.za/thesis/available/etd-10282004-080444.
Pełny tekst źródłaWang, Sheng. "Regularized skewness parameter estimation for multivariate skew normal and skew t distributions". Diss., University of Iowa, 2019. https://ir.uiowa.edu/etd/6875.
Pełny tekst źródłaKelbick, Nicole DePriest. "Detecting underlying emotional sensitivity in bereaved children via a multivariate normal mixture distribution". Columbus, Ohio : Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc%5fnum=osu1064331329.
Pełny tekst źródłaTitle from first page of PDF file. Document formatted into pages; contains xiv, 122 p.; also contains graphics. Includes abstract and vita. Advisor: Joseph, Dept. of Statistics. Includes bibliographical references (p. 119-122).
Castillo, Madeleine Rocio Medrano. "Estimador de estado e parâmetros de linha de transmissão, baseado nas equações normais". Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18133/tde-12122006-144603/.
Pełny tekst źródłaThe process of power system state estimation is subjected to three types of errors: errors in analogical measurements (gross errors), incorrect information about the status of switching devices (topology errors) and incorrect information about the model of the systems equipment (parameter errors). The effects of parameter errors on the process of power system state estimation are drastic and less evident to detect than gross and topology errors. Taking advantage of the fact that a certain fraction of the measurements varies over a small range in a certain period of time, a methodology to estimative transmission line parameters and state based on normal equations has been proposed. In such methodology, which is based on normal equations, the traditional state vector is expanded to include the parameters to be estimated. This augmented state vector is estimated through a large collection of measurements, recorded within several snapshots of the power system, during which the actual system state varies over a small range. This situation typically occurs during the night off-peak periods. An observability analysis methodology is also proposed for the presented estimator. To prove the efficiency of the methodologies, several tests were made using the systems of 6, 14 and 30 buses from IEEE.
Kelly, John Kip. "Estimation of Behavioral Thresholds in Normal Hearing Listeners Using Auditory Steady State Responses". The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1237559225.
Pełny tekst źródłaHolmqvist, Niclas. "HANDHELD LIDAR ODOMETRY ESTIMATION AND MAPPING SYSTEM". Thesis, Mälardalens högskola, Inbyggda system, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-41137.
Pełny tekst źródłaSegerfors, Ted. "Spurious Heavy Tails". Thesis, KTH, Matematisk statistik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168199.
Pełny tekst źródłaEfter den finansiella krisen som hade sin start 2007 har riskmedvetenheten inom den finansiella sektorn ökat. Finansiella institutioner så som banker och försäkringsbolag är noga reglerade och kontrollerade för att skapa en stark och stabil världsekonomi. Genom att banker och försäkringsbolag enligt regelverken måste ha kapitalbuffertar som ska skydda mot konkurser vid oväntade och oönskade händelser skapas en mer harmonisk finansiell marknad. Dessa regelverk som institutionerna måste följa innebär ofta att de ansvariga måste skatta höga kvantiler av institutionens förväntade förlustfunktion. Att skapa en pålitligt modell och sedan skatta höga kvantiler är lätt när det finns mycket relevant data tillgänglig. När det inte finns tillr äckligt med historisk data uppkommer statistiska problem. En lösning på problemet är att poola två eller _era grupper av data som ser ut att komma från samma fördelningsfunktion för att på så sätt skapa en större grupp med historisk data tillgänglig. Detta arbetet går igenom fördelar och risker med att poola data när det inte finns tillräckligt med relevant historisk data för att skapa en pålitlig modell. En viss mix av normalfördelade datagrupper som ser ut att ha samma varians kan uppfattas att komma från tungsvansade fördelningar. Eftersom normalfördelningen inte är en tungsvansad fördelning kan denna missuppfattning skapa problem, detta är ett exempel på falska tunga svansar. Även fast två datagrupper ser ut att komma från samma fördelningsfunktion så är det inte nödvändigtvis bättre att poola dessa grupper för att skapa ett större urval. För två normalfördelade datagrupper med storlekarna m och n och standardavvikelserna s och v, är det farligaste scenariot när v=s är ungefär 2, n+m är mindre än 100 och m=(m+n)är ungefär 0.75. När detta inträffar finns det en signifikant risk att de två datagrupperna ser ut att komma från samma fördelningsfunktion och att den poolade datan innehar tungsvansade egenskaper.
Kelly, J. Kip. "Estimation of behavioral hearing thresholds in normal hearing listeners using auditory steady state responses". Columbus, Ohio : Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1237559225.
Pełny tekst źródłaRivasseau-Jonveaux, Marie-Thérèse. "Appropriation de la temporalité au cours du vieillissement normal et pathologique". Thesis, Nancy 2, 2010. http://www.theses.fr/2010NAN21024/document.
Pełny tekst źródłaTo approach the representation of time and perturbations in time perception for daily activities in mild and moderate Alzheimer's disease patients, we study a temporal semantic knowledge scale and a time duration estimation about daily activities test, in a control group and in a group of 22 patients. The patients also had a general neuropsychological assessment. We conducted with 6 of these patients a semi structured interview. These 6 patients were followed-up with an other similar evaluation. We create a paradigm with the same material to explore brain areas involved in time duration estimation of daily activities. Age and cultural level, but not gender, influence the semantic knowledge scale, which is significatively impaired in patients. Temporal segmentation, independant from cultural level, appears to be the best preserved acquisitions. There is no difference in time duration estimation test about daily activities between controls and patients who seems to use their preserved procedural memory process connected to the scripts of the actions knowledge. The analysis of the interviews using interlocutory logic, gave us a deep understanding of how the patients experience time. Their perception of time is impaired. The estimation duration is significatively more impaired than chronology. The alterations of temporality in Alzheimer's disease have serious impact in daily life of patients and their caregivers. Results will be helpful to develop their diagnosis, elaborate strategies to help the patients and for tutoring interventions for caregivers and professionnals
Anastasiou, Andreas. "Bounds for the normal approximation of the maximum likelihood estimator". Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:c078fc46-7ed7-4e02-9a68-4608acba4bd2.
Pełny tekst źródłaManiparambil-Eapen, Abraham. "The Impact of Non-Reading Language Performance on the Estimation of Premorbid IQ among Normal Elderly Individuals". Wright State University Professional Psychology Program / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=wsupsych1309450983.
Pełny tekst źródłaUchiyama, Hiroyuki, Tomokazu Takahashi, Ichiro Ide i Hiroshi Murase. "Frame Registration of In-vehicle Normal Camera with Omni-directional Camera for Self-position Estimation". IEEE, 2008. http://hdl.handle.net/2237/12052.
Pełny tekst źródłaTazhibi, Mehdi. "Estimation of the parameters in the truncated normal distribution when the truncation point is known". Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242267.
Pełny tekst źródłaDhasarathy, Deepak. "Estimation of vertical load on a tire from contact patch length and its use in vehicle stability control". Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/33559.
Pełny tekst źródła
It was then shown how the estimated load could be used in a control algorithm that applies a suitable control input to maintain the yaw stability of a moving vehicle. A two degree of freedom bicycle model was used for developing the control strategy. A linear quadratic regulator (LQR) was designed for the purpose of controlling the yaw rate and maintaining vehicle stability.
Master of Science
MONTEIRO, Michelle Aparecida Corrêa. "Distribuição normal de Kumaraswamy bivariada". Universidade Federal de Alfenas, 2015. https://bdtd.unifal-mg.edu.br:8443/handle/tede/833.
Pełny tekst źródłaThe normal distribution is the most important probability distribution, used in modeling of continuous data. However, there are cases where the assumption of distribution related to normal model is violated and the search for other distributions that model these cases is necessary. One of the points that can justify the absence of normality is the lack of symmetry. A distribution whose main characteristic shape asymmetric behavior data is Kumaraswamy. The combination of the flexibility of the modeling asymmetric data distribution Kumaraswamy with known distributions, such as normal andWeibull, enabled the creation of a family of generalized distributions. The multivariate distributions we highlight the importance of applications in data modeling in various field of knowledge. However, there is the existence of few distributions that model heavier tails and asymmetry situations. This study aimed to study the class of generalized distributions Kumaraswamy deduct the normal distribution bivariate Kumaraswamy, present the likelihood function and the expressions of their estimators. Implemented the estimation procedure using the scores functions in textit software R and a simulation approach. We evaluated the simulated data estimation and also in real application examples with asymmetric distribution. It can be concluded therefore that the normal distribution bivariate Kumaraswamy was deduced in relation to their joint density function, marginal, conditional and implemented for the simulation study. The estimators behaved precisely, consistent and unbiased. The normal distribution bivariate Kumarawamy adjusted satisfactorily to the actual data of average temperature and total precipitation.
Programa Institucional de Bolsas de Pós-Graduação - PIB-PÓS
Rodriguez, Joan Neylo da Cruz. "Estimação em modelos funcionais com erro normais e repetições não balanceadas". Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/45/45133/tde-19022013-171605/.
Pełny tekst źródłaThis work is concerned with a study on the efficiency of parameter estimates in the functional linear relashionship with constant variances. Where the lack of identification is resolved of by considering replications. Estimation is dealt with by using maximum likelihood and the corrected score approach. Comparisons between the approaches are illustrated by using simulated data.
Sharpnack, James. "Graph Structured Normal Means Inference". Research Showcase @ CMU, 2013. http://repository.cmu.edu/dissertations/246.
Pełny tekst źródłaPerbal-Hatif, Séverine. "Estimation du temps, vitesse de traitement de l'information et mémoire : approche neuropsychologique". Paris 6, 2002. http://www.theses.fr/2002PA066291.
Pełny tekst źródłaReinhammar, Ragna. "Estimation of Regression Coefficients under a Truncated Covariate with Missing Values". Thesis, Uppsala universitet, Statistiska institutionen, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-385672.
Pełny tekst źródłaHattaway, James T. "Parameter Estimation and Hypothesis Testing for the Truncated Normal Distribution with Applications to Introductory Statistics Grades". Diss., CLICK HERE for online access, 2010. http://contentdm.lib.byu.edu/ETD/image/etd3412.pdf.
Pełny tekst źródłaPraxedes, Kelvin da Cruz. "Estudo de modelos de banda larga para estimativa da irradia??o direta normal". PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA MEC?NICA, 2017. https://repositorio.ufrn.br/jspui/handle/123456789/24419.
Pełny tekst źródłaApproved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-12-05T23:21:49Z (GMT) No. of bitstreams: 1 KelvinDaCruzPraxedes_DISSERT.pdf: 2131591 bytes, checksum: 6d84d97152440ede44c629fc9e61855d (MD5)
Made available in DSpace on 2017-12-05T23:21:49Z (GMT). No. of bitstreams: 1 KelvinDaCruzPraxedes_DISSERT.pdf: 2131591 bytes, checksum: 6d84d97152440ede44c629fc9e61855d (MD5) Previous issue date: 2017-08-25
Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)
O presente estudo tem por principal objetivo estudar doze modelos de banda larga para c?u limpo para estimativa de Irradia??o Direta Normal (IDN), e escolher o mais adequado para as condi??es clim?ticas da cidade de Natal-RN. Para tal, fez-se necess?ria uma revis?o acerca dos principais m?todos de estimativa e medi??o da IDN para determinar qual o melhor entre esses, e utiliza-lo na pesquisa. Em seguida estimou-se o valor do coeficiente de turbidez de Angstrom (?), utilizando um modelo matem?tico de parametriza??o proposto por Louche et al. (1987). Para a estimativa de ? e o c?lculo dos valores de IDN dos modelos utilizados no trabalho, tomou-se como base dados da esta??o meteorol?gica do CTG?S-ER, localizada em Natal-RN (altitude 84 m; latitude 5,82?S, longitude 35,23?W). A esta??o solar tamb?m forneceu dados de IDN mensurados a partir de um pireli?metro, onde foi poss?vel comparar os resultados obtidos a partir dos modelos com os mensurados, e verificar a viabilidade desses modelos para as condi??es clim?ticas da regi?o estudada. O valor de ? ? apresentado neste trabalho em m?dias mensais. O resultado obtido segue em partes o padr?o esperado, que ? de menores valores de ? nos meses de inverno, e maiores valores de ? nos meses de ver?o. Os meses de Dezembro e Janeiro destoam desse padr?o, devido principalmente ? quantidade de chuvas incidente nesses meses ser superior em mais de 40% para o m?s de Janeiro, e de 200% para o m?s de Dezembro, quando comparado com a m?dia dos ?ltimos dez anos. Os valores m?nimos e m?ximos apresentados para ? s?o de 0,094 em Julho e de 0,128 em Mar?o. Essa proximidade de valores ? decorrente de n?o haver uma varia??o consider?vel no valor de espessura de precipita??o de ?gua ao longo do ano, principalmente pelo fato da temperatura m?dia em Natal ser praticamente a mesma ao longo de todo o ano. Com rela??o aos modelos de banda larga, estes foram divididos em dois grupos para an?lise, considerando a quantidade de par?metros de entrada. Os que precisam de quatro ou menos par?metros s?o considerados modelos simples, e os que precisam de mais de quatro par?metros, modelos complexos. Para valida??o dos resultados encontrados, utilizou-se seis m?todos estat?sticos, o Erro M?dio Bias (MBE), a Raiz Quadr?tica do Erro M?dio (RMSE), o Teste t-estat?stico (TT), a Incerteza Expandida (U95), o Coeficiente de Correla??o de Pearson (r) e o Coeficiente de Determina??o (R2). Os modelos foram classificados e rankeados de acordo o desempenho de cada um dos m?todos estat?sticos, calculados atrav?s do Indicador de Performance Global (IPG). Os resultados obtidos mostram que, para a cidade de Natal, a quantidade de par?metros n?o determina o desempenho dos modelos, j? que os modelos simples obtiveram um dos tr?s melhores resultados, e tamb?m os dois piores.
The present study has as main objective to study twelve broadband models for clean sky to estimate Direct Normal Irradiation (IDN), and to choose the most suitable for the climatic conditions of the city of Natal-RN. To do this, a revision was necessary about the main methods of estimation and measurement of IDN to determine the best among them, and used it in the research. Then the value of the Angstrom turbidity coefficient (?) was estimated using a mathematical model of parameterization proposed by Louche et al. (1987). For the estimation of ? and the calculation of the IDN values of the models used in the study, data from the CTG?S-ER meteorological station, located in Natal-RN (altitude 84 m, latitude 5.82 ? S, longitude 35.23 ? W). The solar station also provided IDN data measured from a pyreliometer, where it was possible to compare the results obtained from the models with those measured, and verify the viability of these models for the climatic conditions of the studied region. The value of ? is presented in this work in monthly averages. The obtained result follows in parts the expected pattern, which is of lower values of ? in the winter months, and higher values of ? in the summer months. The months of December and January fall short of this pattern, mainly due to the amount of rainfall in these months being more than 40% higher in January and 200% in December compared to the average of the last ten years. The minimum and maximum values presented for ? are 0.094 in July and 0.128 in March. This proximity of values is due to the fact that there is not a considerable variation in the value of water precipitation thickness throughout the year, mainly because the average temperature in Natal be practically the same throughout the year. Regarding broadband models, these were divided into two groups for analysis, considering the number of input parameters. Those that need four or fewer parameters are considered simple models, and those that need more than four parameter complex models. In order to validate the results, we used six statistical methods, the Mean Bias Error (MBE), the Mean Error Root Mean (RMSE), the t-statistic (TT), the Expanded Uncertainty (U95), the Coefficient of Pearson correlation (r) and the Determination Coefficient (R2). The models were classified and ranked according to the performance of each of the statistical methods, calculated through the Global Performance Indicator (GPI). The results show that for the city of Natal, the number of parameters does not determine the performance of the models, since the simple models obtained one of the three best results, and also the two worst ones.
Karlsson, Emil. "Explicit Estimators for a Banded Covariance Matrix in a Multivariate Normal Distribution". Thesis, Linköpings universitet, Matematisk statistik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-107194.
Pełny tekst źródła