DSpace Coleção:
https://repositorio.ufrn.br/jspui/handle/123456789/12035
2019-06-20T00:55:43ZTestes escore corrigidos para modelos lineares generalizados no ambiente R
https://repositorio.ufrn.br/jspui/handle/123456789/27174
Título: Testes escore corrigidos para modelos lineares generalizados no ambiente R
Autor(es): Silva Júnior, Antonio Hermes Marques da
Abstract: Bartlett's corrections are statistical procedures to improve statistics whose distributions
are approximated by the chi-square distribution. An application of this methodology is
to improve the score test in generalized linear models. The resulting correction formula
depends on the construction of several matrices whose elements are expressions which
involve rst and second order derivatives of the mean and of the variance function taken
both with respect to the model linear predictor. As a result, di culties inherent to the
process to obtain those derivatives, or even to modify them when it is necessary to respecify
the random or the systematic model component, may be the primary cause that this
correction methodology is not yet seen as useful tools in the applications of the score test.
This master's thesis proposes a computer program developed in the statistical software
R to implement automatically corrected score tests given the t of a generalized linear
model. Technical details and instructions to use the program are explored on the basis of
the analyses of a series of real data examples found in the literature. Furthermore, the
results of two simulation experiments are discussed in order to compare properties of the
uncorrected and corrected tests and to show the versatility of the proposed program used
as a computing tool in the experiments.2009-05-28T00:00:00ZAnálise da taxa de convergência da regra de classificação dos k-vizinhos mais próximos
https://repositorio.ufrn.br/jspui/handle/123456789/26313
Título: Análise da taxa de convergência da regra de classificação dos k-vizinhos mais próximos
Autor(es): Araújo, Juscelino Pereira de
Abstract: The main objective of this work is to analyze the velocity of convergence of k-Nearest
Neighbor (kNN) classification rule. Thus the binary classification problem is approached.
The main theoretical results are developed, overall Stone Theorem, which guarantees the
universal consistency of classification rules with some properties. Specifically the kNN
rule is analyzed, mainly its universal consistency. Then restrictive conditions which allow
uniform rates of convergence for a family of distributions are presented. Finally, under
the mentioned restrictive conditions the order of magnitude of rate of convergence of kNN
rule is obtained such that it cross out the need of a bounded space of observations.2018-10-05T00:00:00ZDe relações a vizinhanças: um entendimento sobre não-normalidade modal
https://repositorio.ufrn.br/jspui/handle/123456789/26312
Título: De relações a vizinhanças: um entendimento sobre não-normalidade modal
Autor(es): Dantas Neto, João Freire
Abstract: The quest for mathematical structures to represent some logical behaviors is important
for a better understanding of these logics. For example, propositional classical logic can
be characterized by Boolean Algebras. When adding modalities to classical logic, we
need other structures to represent them, as relational frames for normal modal logics, for
example in the case of non-normal modalities, we need neighborhood frames to represent
classical modal logics. In this work we investigate neighborhood frames for non-normal
modal logics, with the goal to relate frame semantics with proof systems. Moreover we
aim to understand proof systems with semantic language internalized.2018-10-18T00:00:00ZBidualização de espaços afins
https://repositorio.ufrn.br/jspui/handle/123456789/26153
Título: Bidualização de espaços afins
Autor(es): Silva, Josenildo Lopes da
Abstract: Main concepts on a ne space are presented. Let X be an a ne space modelled on a
vector space V and X? = A(X, R) be the a ne dual of X, that is, the vector space of all a ne
maps from X to the real line. It is well known that in the case of a nite dimensional vector
space V , the bidual V
∗∗ is isomorphic to V . We consider the vectorial bidual (X?
)
∗ of X and
an immersion of the a ne space X into its vectorial bidual. We present a discussion how to
de ne the a ne bidual X?? of X.2018-08-30T00:00:00Z