Symmetrical Class
Mostrando 1-12 de 33 artigos, teses e dissertações.
-
1. SYNTHESIS AND BIOLOGICAL EVALUATION OF SPIRO[INDOLINE-3,4’-PYRANO[2,3-C:6,5-C’]DIPYRAZOL]- 2-ONES IN THE PRESENCE OF SBA-Pr-SO3H AS A NANOCATALYST
Sulfonic acid functionalized SBA-15 nanoporous material (SBA-Pr-SO3H) with a large pore size of 6 nm, a high surface area, high selectivity, and excellent chemical and thermal stability was applied as an efficient heterogeneous nanoporous acid catalyst in the reaction of isatin with pyrazolones under mild reaction conditions. A novel class of symmetrical spi
Quím. Nova. Publicado em: 2015-11
-
2. Regularity results for semimonotone operators
We introduce the concept of ρ-semimonotone point-to-set operators in Hilbert spaces. This notion is symmetrical with respect to the graph of T, as is the case for monotonicity, but not for other related notions, like e.g. hypomonotonicity, of which our new class is a relaxation. We give a necessary condition for ρ-semimonotonicity of T in terms of Lispchit
Computational & Applied Mathematics. Publicado em: 2011
-
3. Modelos não lineares sob a classe de distribuições misturas da escala skew-normal / Nonlinear models based on scale mixtures skew-normal distributions
Neste trabalho estudamos alguns aspectos de estimação e diagnóstico de influência global e local de modelos não lineares sob a classe de distribuição misturas da escala skew-normal, baseado na metodologia proposta por Cook (1986) e Poon &Poon (1999). Os modelos não lineares heteroscedásticos também são discutidos. Esta nova classe de modelos const
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 08/07/2010
-
4. Modelos lineares generalizados simÃtricos heterocedÃsticos
The heteroscedastic symmetrical generalized linear models class is describe for a response that belongs to a symmetrical class of distributions, a linear predictor relate to a location parameter and a linear predictor associate to a dispersion parameter, both link functions. These models are natural extensions of symmetrical generalized linear models propose
Publicado em: 2009
-
5. Análise bayesiana do modelo fatorial dinâmico para um vetor de séries temporais usando distribuições elípticas. / Bayesian Analysis of the dynamic factorial models for a time series vector using elliptical distribuitions.
The factor analysis is an important statistical tool that has wide practical applications and it explains the correlation among a large number of observable variables in terms of a small number of unobservable variables, known as latent variables. The proposal of this work is the Bayesian analysis, which incorporates the information we have concerning the pa
Publicado em: 2008
-
6. Synthesis and characterization of new amino acyl-4-thiazolidones
A series of heterocyclic compounds with a 4-thiazolidone nucleus and amino acyl moiety were synthesized by protection reaction of thiosemicarbazide using the symmetrical anhydride (Boc)2O and cyclization with chloroacetic acid under mild conditions. Trifluoroacetic acid was used to obtain 4-thiazolidone and the alpha-amino acid condensation reactions were ca
Química Nova. Publicado em: 2007-04
-
7. Soluções "ground states" para uma classe de problemas elípticos semilineares
We will consider in this work a class of semilinear problems in RN whose main characteristic is the presence of a singular term in the not linear perturbation of the operator. Combining variational techniques, arguments of the type upper and lower solutions and principle of comparison we prove a theorem, due to Zhang [49], 2007, that it establishes the exist
Publicado em: 2007
-
8. Escolha de acordo com o modelo: relações emergentes entre estímulos arbitrários em indivíduos de diferentes condições de peso corpóreo / Matching-to-Sample: emerging relations between arbitrary stimuli in individuals of different conditions of body weight
The objective of this project was to investigate if the stimuli Equivalence model can describe part of the obesity problem related to the external control of stimuli. Six subjects, three with IMC<24.9Kg/m2 and three with IMC >24.9 were exposed twice to a same choice procedure in accordance with the model that utilized a set of non-food stimuli in the first s
Publicado em: 2007
-
9. The girl from the Church of the Sacrament: a case of congenital syphilis in XVIII century Lisbon
Syphilis is a sexually or congenitally transmitted infectious disease with an impact on the health of human populations that has undergone important cycles in different countries and periods of history. Its presence was first diagnosed in Europe in the late XIV century. In Portugal, although there are various written records of the infection in the last cent
Memórias do Instituto Oswaldo Cruz. Publicado em: 2006-12
-
10. Modeling polycrystals with regular polyhedra
Polycrystalline structure is of paramount importance to materials science and engineering. It provides an important example of a space-filling irregular network structure that also occurs in foams as well as in certain biological tissues. Therefore, seeking an accurate description of the characteristics of polycrystals is of fundamental importance. Recently,
Materials Research. Publicado em: 2006-06
-
11. DiagnÃstico em modelos simÃtricos de regressÃo
The statistical modelling using the assumption of normally distributed errors can be strongly influenced by extreme observations. This motivates the study on regression techniques that are roobust in presenceof this type pof observations. As an alternative, models in wich the error term belongs to the symmetrical class can be considered. This class of models
Publicado em: 2005
-
12. Reconhecimento de caracteres manuscritos baseado em regiões perceptivas
This work investigates the perceptual zoning mechanism for handwritten character recognition. It is proposed a non-symmetrical zoning mechanism as the baseline on the analysis of the confusion matrix for each individual classifier (Class-Modular). Zoning is a method for local information analysis on partitions of a given pattern. The feature extraction is ba
Publicado em: 2005