Дисертації з теми "Local curvature"
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Friday, Brian Matthew. "VANISHING LOCAL SCALAR INVARIANTS ON GENERALIZED PLANE WAVE MANIFOLDS." CSUSB ScholarWorks, 2019. https://scholarworks.lib.csusb.edu/etd/884.
Повний текст джерелаScholtes, Sebastian [Verfasser]. "Geometric curvature energies : from local to global ; from discrete to smooth / Sebastian Scholtes." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2014. http://d-nb.info/1066812713/34.
Повний текст джерелаRazive, Mohammad Nahid Islam. "Evaluation of linear segment length and local curvature radius along airfoil leading and trailing edges." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/42027.
Повний текст джерелаXu, Xun [Verfasser]. "Stem Cell Instruction via Appropriate Geometry and Local Curvature of Microstructured Polymeric Substrates / Xun Xu." Berlin : Freie Universität Berlin, 2019. http://d-nb.info/1182314481/34.
Повний текст джерелаBustamante, Juan Pablo Mamani. "Influência local com procura \"forward\" em modelos de regressão linear." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/104/104131/tde-19012017-112532/.
Повний текст джерелаThe identification of influential and/or atypical observations in a data set is known as a part of the diagnostic analysis. One of the purposes of the diagnostic analysis is to verify the robustness of a statistical model, as the non-identification of influential observations can affect the analysis or may cause the obtainment of incorrect results. The most commonly used methodology for the diagnostic of influential observations in regression models are the global influence (Belsey et al., 1980). Cook (1986) introduced a general method to evaluate the local influence of small perturbations in the statistical model or in the data set using different perturbation schemes. As a complement to the techniques of detection atypical observations, it is proposed the forward search procedure by Atkinson e Riani (2000), which is a methodology to detect the masked atypical observations in a data set. In this work we propose the use of the local influence approach together with the forward search to obtain the masked influential observations in linear regression models.
Wells-Day, Benjamin Michael. "Structure of singular sets local to cylindrical singularities for stationary harmonic maps and mean curvature flows." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/290409.
Повний текст джерелаZhang, Zichen. "Local gradient estimate for porous medium and fast diffusion equations by Martingale method." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:551f79f8-b309-4a1f-8afa-c7dc433dad82.
Повний текст джерелаShiping, Liu. "Synthetic notions of curvature and applications in graph theory." Doctoral thesis, Universitätsbibliothek Leipzig, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-102197.
Повний текст джерелаSantos, Makson Sales. "Métricas com Q-curvatura constante via um fluxo não local e um princípio do máximo para o operador de Paneitz." Universidade Federal de Sergipe, 2015. https://ri.ufs.br/handle/riufs/5804.
Повний текст джерелаNão consta
O objetivo desta dissertação é expor com detalhes o resultado de Gursky-Malchiodi. Dada uma variedade Riemanniana (M,g) de dimensão n>4 com curvatura escalar não negativa e Q-curvatura semipositiva, existe uma métrica conforme a g com Q-curvatura constante positiva. Com estas hipóteses mostra-se um princípio do máximo forte para o operador de Paneitz, que é um operador diferencial parcial não linear de quarta ordem. A partir daí define-se um fluxo não local e, utilizando funções testes, modificamos conformemente a métrica inicial tal que o fluxo converge sequencialmente para uma métrica conforme de Q-curvatura constante positiva e curvatura escalar positiva.
Ferrari, Antonio Luiz. "Variabilidade e tendência da temperatura e pluviosidade nos municípios de Pirassununga, Rio Claro, São Carlos e São Simão (SP): estudo sobre mudança climática de curto prazo em escala local." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18139/tde-23112012-133929/.
Повний текст джерелаThe aim of this research is to study the variability and tendency in climatic elements, rainfall and temperature in four cities in the state of São Paulo: Pirassununga, Rio Claro, São Carlos and São Simão which are part of the flight training area of the Air Force Academy, in order to confirm the hypothesis that those alterations indicate signs of climatic variations in the short term, according to the local parameters and that those variations may change the schedule of the flight training missions at AFA. Monthly and annual data regarding to temperature and rainfall, recorded during a period of 34 years (1976-2009) were firstly considered during the study, followed by a shorter period of 16 years (1994-2009). In order to analyze the climatic conditions in São Carlos, Rio Claro and São Simão, monthly and annual data about temperature and rainfall collected during a period of 16 years (1994-2009) were considered. For purposes of statistical analysis of the climatic variability of temperature and rainfall within the chosen period of time, calculation of the arithmetic mean, standard deviation, coefficient of variation and temperature range were applied. In order to analyze such tendency, the linear regression model and non-parametric statistical tests, known as Mann-Kendall and Sen Curvature were applied. The results of the research showed that the monthly and annual variability of the rainfall in the four cities is similar and well marked and that there are not significant tendencies in that variable in the four cities. Relating to temperature in Pirassununga, the average temperature showed large monthly variability. In Rio Claro, São Carlos and São Simão, the annual temperature variability was low, tending to be stable, except for the minimum temperature which showed a large variability. Concerning to Pirassununga, just the average temperature tended to be decreasing and significant. The results obtained for the temperatures in Rio Claro, São Carlos and São Simão tended to be increasing and/or decreasing, but such tendencies were irrelevant.
MARINELLI, GIUSEPPE. "Road geometry identification with mobile mapping techniques." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2606568.
Повний текст джерелаHuang, Conglin. "3D RECONSTRUCTION USING MULTI-VIEW IMAGING SYSTEM." UKnowledge, 2009. http://uknowledge.uky.edu/gradschool_theses/600.
Повний текст джерелаRusso, Cibele Maria. ""Análise de um modelo de regressão com erros nas variáveis multivariado com intercepto nulo"." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-01082006-214556/.
Повний текст джерелаTo analyze some characteristics of interest in a real odontological data set presented in Hadgu & Koch (1999), we propose the use of a multivariate null intercept errors-in-variables regression model. This data set is composed by measurements of dental plaque index (with measurement errors), which were measured in volunteers who were randomized to two experimental mouth rinses (A and B) or a control mouth rinse. The measurements were taken in each individual, before and after the use of the respective mouth rinses, in the beginning of the study, after three months from the baseline and after six months from the baseline. In this case, a possible structure of dependency between the measurements taken within the same individual must be incorporated in the model. After presenting the statistical model, we obtain the maximum likelihood estimates of the parameters using the numerical algorithm EM, and we test the hypotheses of interest considering asymptotic tests (Wald, likelihood ratio and score). Also, a simulation study to verify the behavior of these three test statistics is presented, considering diferent sample sizes and diferent values for the parameters. Finally, we make a diagnostic study to identify possible influential observations in the model, considering the local influence approach proposed by Cook (1986) and the conformal normal curvature proposed by Poon & Poon (1999).
Hu, Min. "Local variation in bending stiffness in structural timber of Norway spruce : for the purpose of strength grading." Licentiate thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-38119.
Повний текст джерелаDe flesta av de utrustningar för hållfasthetssortering som utnyttjas på deneuropeiska marknaden använder ett medelvärde på elasticitetsmodulen(MOE), beräknat på en relativt stor längd av en sågad planka, som indikativparameter (IP). Sådan hållfasthetssortering ger en noggrannhet i termer avförklaringsgrad på R2 ≈ 0.5, vilket är ganska lågt. Arbetet i denna studiemotiveras av en önskan att öka noggrannheten i hållfasthetssorteringen. Syftetmed denna studie är att bidra med kunskap om lokala variationer iböjstyvhet/MOE med hög upplösning och att lokalisera veka snitt (där kvistarär den viktigaste försvagande faktorn) för konstruktionsvirke.Den aktuella studien introducerar tre metoder som omfattar strukturdynamik,klassisk balkteori och optisk mätning vid bedömningen av lokal styvhet imaterialet. Specifikt: Metod I, där den lokala böjstyvheten studerades genom de dynamiskaegenskaperna såsom egenfrekvens och modform. Metod II, där en MOE profil beräknas på basis av information om lokalafibervinklar på ett virkesstyckes ytor. Den lokala fiberorienteringen mätsmed högupplöst laserskanning baserad på den så kallade trakeideffekten. Metod III, där en MOE-profil fastställdes med hjälp avtöjningsinformation för en hel flatsida av en planka belastad med konstantböjmoment. Det högupplösta töjningsfältet erhölls med hjälp av teknikför Digital Image Correlation (DIC). Studien visar att de två sistnämnda metoderna är mycket lämpade för attutvärdera den lokala styvheten i ett virkesstycke. Dessutom visar studien att deMOE-profiler som togs fram med hjälp av de två sistnämnda metoderna,vilka baseras på information om lokala fibervinklar och töjningsfältet på ytan,stämde överens för större delen av virkesstycket. För visa kvistgrupper kan dock den lokala böjstyvheten högre med metoden baserad på fibervinklar.
Freitas, Pires Juliana. "Influência local através da curvatura normal em modelos multiníveis." Universidade Federal de Pernambuco, 2009. https://repositorio.ufpe.br/handle/123456789/6079.
Повний текст джерелаConselho Nacional de Desenvolvimento Científico e Tecnológico
Os modelos lineares hierárquicos foram desenvolvidos para análise de dados que possuem uma estrutura de grupo, ou seja, uma estrutura de hierarquia, por levarem em consideração a dependência dos dados existente dentro de cada nível hierárquico. As estimativas dos parâmetros dos modelos hierárquicos são apresentadas separando os efeitos fixos dos aleatórios. O modelo linear hierárquico com dois níveis é apresentado e ilustrado através de um exemplo, juntamente com a sua teoria de estimação e testes de hipóteses. Para avaliar este modelo com respeito a sensibilidade sob pequenas perturbações, uma técnica de influência local sob a curvatura normal foi desenvolvida. Os dados do SAEPE 2005 foram estudados sob este enfoque
LOBATO, JÚNIOR Dorival. "Influência local em modelos de regressão." Universidade Federal de Campina Grande, 2005. http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/1109.
Повний текст джерелаMade available in DSpace on 2018-07-05T20:12:22Z (GMT). No. of bitstreams: 1 DORIVAL LOBATO JÚNIOR - DISSERTAÇÃO PPGMAT 2005..pdf: 658187 bytes, checksum: 934af5bed920aceba4c0f48a5fbca2d6 (MD5) Previous issue date: 2005-08
Neste trabalho, estudamos a influência local em modelos de regressão.Este método foi proposto inicialmente por Cook (1986) e tem se mostrado como um poderoso instrumento da análise de diagnóstico. A proposta de Cook consiste em avaliar a curvatura normal de uma superfície, baseada na medida Likelihood Displacement, sob uma pequena peturbação no modelo. Em seguida apresentamos a abordagem de Billor e Loynes (1993), que aplicam uma medida Likelihood Displacement modificada, cuja primeira deriva da não se anula, exceto em casos triviais, com isso a inclinação máxima é usada como medida de influência local. No final, discutimos três aplicações onde utilizamos algumas técnicas gráficas de diagnóstico e as duas propostas de influência local aqui referidas.
In this work, we study the local influence in regression models, this method was offer first of all by Cook(1986) and have show how an important instrument of the diagnostics analysis. The Cook's approach consist in assessing the normal curvature of the geometric surface, using the measure Likelihood Displacement, under an minor perturbations of statistical model. After we present the approach of the Billor and Loynes (1993), that apply an measure Likelihood Displacement changes whose first derivative does not, except in trivial cases, vanish.Thus the maximum slop is using how measure of the local influuence. In finish, we present three apply where use any technic graphics of the diagnostics and the two proposed of the local influence here reported.
De, Lorenzi Diego. "La rigidità della sfera." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18241/.
Повний текст джерелаNguyen, Xuan Viet Nhan. "Structure métrique et géométrie des ensembles définissables dans des structures o-minimales." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4742/document.
Повний текст джерелаThe thesis focus on study geometric properties of definable sets in o-minimal structures and its applications. There are three main results presented in this thesis. The first is a geometric proof of the existence of Whitney (a) and (b)-regular stratifications of definable sets. The result was initially proved by T. L. Loi in 1994 by using another method. The second is a proof of existence of Lipschitz stratifications (in the sense of Mostowski) of definable sets in a polynomially bounded o-minimal structure. This is a generalization of Parusinski's 1994 result for subanalytic sets. The third result is about the continuity of of variations of integral geometry called local Lipschitz Killing curvatures which were introduced by A. Bernig and L. Broker in 2002. We prove that Lipschitz Killing curvatures are continuous along strata of Whiney stratifications of definable sets in a polynomially bounded o-minimal structure. Moreover, if the stratifications are (w)-regular the Lipspchitz Killing curvatures are locally Lipschitz
Melo, Fábio Silva. "Teoria de curvas para métricas não-euclidianas." reponame:Repositório Institucional da UNILA, 2016. http://dspace.unila.edu.br/123456789/560.
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A teoria local de curvas da Geometria Diferencial no plano e no espaço euclidiano é bem conhecida (vide referências como [4] e [13]). Este trabalho consiste de uma generalização desta teoria usando métricas arbitrárias. Tal generalização é feita substituindo a matriz identidade que define o produto interno usual por outra matriz quadrada, simétrica e positiva definida. Com este novo produto interno, são estudados conceitos como vetor tangente, vetor normal, vetor binormal, fórmulas de Frenet, curvatura e torção
Kung, David T. "Local smoothing phenomena for operators failing the cinematic curvature condition." 2000. http://www.library.wisc.edu/databases/connect/dissertations.html.
Повний текст джерелаLin, Ber Shiou. "A Local Geometric Constructive Method for Generating Curvature Continuous Shape Preserving Curves." 1993. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0009-0112200611361167.
Повний текст джерелаShiping, Liu. "Synthetic notions of curvature and applications in graph theory." Doctoral thesis, 2012. https://ul.qucosa.de/id/qucosa%3A11816.
Повний текст джерелаFan, Yuan-Jia, and 范原嘉. "Structures of octahedral fullerenes and the application of discrete local curvature and continuum elastic theory to the study of fullerene''s stability." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/51728487455511815157.
Повний текст джерела國立臺灣大學
化學研究所
104
There are two chapters in this dissertation. In Chapter 1, a modified elastic theory for $ ext{sp}^2$ pure carbon molecules has been proposed. The theory includes high order term in curvature, the bond stretching term and the tight-binding correction. The validity of this model has been examined by various graphitic-like molecules with different topology. The model can be applied on DFT (Density Functional Theory) optimized geometry or AIREBO (Adaptive Intermolecular Reactive Empirical Bond-Order) optimized geometry. Finally the most stable fullerene was found by constructing the candidates via the new model first and then verifying by VASP. In Chapter 2, a construction scheme of octahedral fullerenes has been built. After investigating the topological constraint, a fundamental polygon compatible with the octahedral symmetry was found. The fundamental polygon can be specified by four integers called index. However, the octahedral fullerene does not specified by a unique index and there is redundancy in the indexes which we called index symmetries. Besides symmetries corresponded to the geometrical symmetries of the graphene, there are symmetries originated from different dissection ways of the octahedral fullerenes. Finally all the possible orbits are clarified and an algorithm to eliminate these redundancy has been suggested.