Model Confidence Set
Mostrando 13-24 de 36 artigos, teses e dissertações.
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13. Análise screening de vinhos empregando um analisador fluxo-batelada, espectroscopia UV-VIS e quimiometria
A simple, robust, versatile, high analytical frequency method was proposed to check if a sample of wine is within the range of standards set by the manufacturer, using the UV-VIS spectroscopy, multivariate analysis and a flow-batch analyzer. Two hundred and fifty-two samples of wines were analyzed. The results from the application of Hierachical Cluster Anal
Química Nova. Publicado em: 2010
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14. IdentificaÃÃo de Pontos Influentes em uma Amostra AleatÃria de PrÃ-formas da DistribuiÃÃo Bingham Complexa (DistÃncia de Cook e MÃtodos de Bootstrap)
The objective of this dissertation is the evaluation and application of influence analysis methods in statistical shape analysis. Through the model of deleting cases (CDM) is obtained a measure of the Cook distance when the data set has the complex Bingham distribution. Through simulations of Monte Carlo and the bootstrap method the estimation of region of c
Publicado em: 2009
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15. Impacto da colaboração na gestão estratégica da informação em empresas do setor de bens de capital-mecânicos
The supply chain management has been marked by many conflicts between internal and external agents of the productive chain. Notwithstanding, a new administrative practice based on collaboration and intensive exchange of information has emerged as a new form of relationship amongst the distinct agents. Based on that, this study aims to understand the existing
Publicado em: 2009
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16. Regiões de confiança para a localização do ponto estacionário em superfícies de resposta, usando o método "bootstrap" Bayesiano / Confidence region on the location of the stationary point in response surfaces, a Bayesian bootstrap approach
Experiments in which one or more response variables are influenced by several quantitative factors are very common in agricultural, chemistry, biology and other areas. In this case, the research question consists in studying this relation, being of great utility the use of response surface methodology (RSM). In this context determining the level of the facto
Publicado em: 2008
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17. Predição da demanda química de oxigênio em chorume maduro contendo reagente de Fenton, por meio de modelo matemático empírico gerado com planejamento fatorial completo
COD is an important parameter to estimate the concentration of organic contaminants. The closed system technique with the use of K2Cr2O7 is the most important one, however, it has the inconvenience to suffer positive chemical interferences from inorganic compounds such as Fe2+ and H2O2 (not enough reported in the literature). This paper considers a statistic
Química Nova. Publicado em: 2008
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18. New limits for the violation of the equivalence prinriple on solar neutrinos / Novos limites para violação do principio da equivalencia em neutrinos solares
In this work, we studied the model for the violation of the equivalence principle (VEP) on solar and reactor neutrinos. This model was already considered as a promising solution to the solar neutrino problem (SNP), but was abandoned because it wasn?t able to explain all the data with a single set of physical parameters. The mass- avor mixing model, together
Publicado em: 2008
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19. Identificação de parâmetros de motor de indução linear tubular para extração de petróleo. / Identification of parameters of the tubular linear induction motor for the extraction of oil.
This work presents the identification of parameters of the tubular linear induction motor for the extraction of oil, called MATÆOS - which is the Portuguese acronym for Asynchronous Tubular Motor for Application to Subterranean Oil Extraction. The first step to the identification of the motor parameters was the implementation of the supervisory and control
Publicado em: 2008
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20. Estimação de contrastes de médias de tratamentos, de um experimento em blocos ao acaso, utilizando as análises clássica e espacial / Estimation of treatments means contrasts, in a random blocks model, using the classical and spatial analysis
Not controllable factors is common occur in experiments, they are responsible for the heterogeneity among parcels. Even executing the three experimentation basic principles in the design (repetition, randomization and local control), even so, may have correlation in errors and, therefore, spatial dependence in the area of study. If that autocorrelation struc
Publicado em: 2008
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21. MODELOS NEURO-FUZZY HIERÁRQUICOS BSP DO TIPO 2 / TYPE-2 HIERARCHICAL NEURO-FUZZY BSP MODEL
The objective of this thesis is to create a new type-2 fuzzy inference system for the treatment of uncertainties with automatic learning and that provides an interval of confidence for its defuzzified output through the calculation of corresponding type-reduced sets. In order to attain this objective, this new model combines the paradigms of the modelling of
Publicado em: 2007
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22. Structural coverage analysis of test sets derived from formal specifications: a comparative study in the space applications context / Análise de cobertura de critérios de teste estruturais a partir de conjuntos derivados de especificações formais: um estudo comparativo no contexto de aplicações espaciais
Testing techniques can be divided, in high level, in code-based ones (white box) and specification based ones (black box). None of them are complete as they intend to identify different kinds of faults. The use of them together can increase the application confidence level. Thus, it is important to investigate the relationship between structural testing tech
Publicado em: 2007
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23. Raciocínio condicional : O uso de modelos mentais influenciados pelo acesso da informação na memória
This study investigates conditional reasoning within the mental model framework and the influences of semantic memory. Conclusions in conditional reasoning are explained in terms of mental models for the If P then Q rule, according to Johnson-Laird (2001). However, mental model theory has explored very little on the elaboration of additional models which cou
Publicado em: 2006
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24. Caracterização da microestrutura de materiais porosos por microtomografia de raios x e transmissão de raios gama
This work presents the application of the X-Ray Microtomography and Gamma Ray Transmission techniques for the microstructure characterization of different kinds of materials. Total porosity, pore size distribution and the two point correlation functions were measured. The two point correlation function, which allows the reconstruction of 3D models, was carri
Publicado em: 2006