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Covariance reducing models: An alternative to spectral modelling of covariance matrices
(Oxford University Press, 2008-12)
We introduce covariance reducing models for studying the sample covariance matrices of a random vector observed in different populations. The models are based on reducing the sample covariance matrices to an informational ...
Likelihood-Based Sufficient Dimension Reduction
(American Statistical Association, 2009-03)
We obtain the maximum likelihood estimator of the central subspace under conditional normality of the predictors given the response. Analytically and in simulations we found that our new estimator can preform much better ...
Detección mejorada de la microsismicidad y evaluación de detonantes dinámicos en la cuenca central del Mar de Mármara, Turquía
(Universidad de los AndesGeocienciasFacultad de CienciasDepartamento de Geociencias, 2020)
This project presents an improved detection of microseismicity for the sea of Marmara central basin, an inland sea at Europe South-East, in Turkey, which is under the effect of North Anatolian Fault. The procedure is applied ...
Estimating sufficient reductions of the predictors in abundant high-dimensional regressions
(Institute of Mathematical Statistics, 2012-02)
We study the asymptotic behavior of a class of methods for sufficient dimension reduction in high-dimension regressions, as the sample size and number of predictors grow in various alignments. It is demonstrated that these ...
PLS regression algorithms in the presence of nonlinearity
(Elsevier Science, 2021-06)
It has long been emphasized that standard PLS regression algorithms like NIPALS and SIMPLS are not suitable for regressions in which there is a nonlinear relationship between the response and the predictors. We show that ...
O centro e as novas centralidades: considerações a partir dos circuitos da economia urbana na cidade de Caicó/RN
(Universidade Federal do Rio Grande do NorteBrasilUFRNGeografia Bacharelado, 2015-12-03)
The course completion work refers to the urban space of the Caicó/RN, whose general objective was to interpret its spatial forms of commercialization and evidenced services from the theory of the urban economy circuits. ...
On the extent of star countable spaces
(VERSITA, 2011)
For a topological property P, we say that a space X is star Pif for every open cover Uof the space X there exists Y aS, X such that St(Y,U) = X and Y has P. We consider star countable and star Lindelof spaces establishing, ...
Evolutionary Conserved Positions Define Protein Conformational Diversity
(Public Library of Science, 2016-03)
Conformational diversity of the native state plays a central role in modulating protein function. The selection paradigm sustains that different ligands shift the conformational equilibrium through their binding to ...
Engineering of surface microstructure transformations using high rate severe plastic deformation in machining
(UniandesDoctorado en IngenieríaFacultad de Ingeniería, 2015)
Engineering surface stuctures especially at the nanometer length-scales can enable fundamentally new multifunctional property combinations, including tunable physical, mechanical, electrochemical and biological responses. ...
Codimensões, cocaracteres, identidades e polinômios centrais Z$_2$-graduados da álgebra de Grassmann
(Universidade Federal de Minas GeraisUFMG, 2008-12-02)
Let E be the in_nite-dimensional Grassmann algebra over a _eld F of characteristic zero and consider L the F-vector space spanned by all generators of E. Let 'l be an automorphism of E of order 2 such that L is an homogeneous ...