Results 71 to 80 of about 278 (209)
Revista Española de Lingüística, 2021 «Matrix syntax» es un modelo formal de relaciones sintácticas en el lenguaje. La estructura matemática resultante se asemeja a algunos aspectos de la mecánica cuántica. «Matrix syntax» nos permite describir una serie de fenómenos del lenguaje que de otro
Román Orús, Juan Uriagereka
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Asymptotic properties of cross‐classified sampling designs
Canadian Journal of Statistics, EarlyView.Abstract We investigate the family of cross‐classified sampling designs across an arbitrary number of dimensions. We introduce a variance decomposition that enables the derivation of general asymptotic properties for these designs and the development of straightforward and asymptotically unbiased variance estimators.
Jean Rubin, Guillaume Chauvet
wiley +1 more source
Memoria Investigaciones en Ingeniería, 2016 El objetivo de este artículo es compartir, con la comunidad educativa y científica, la utilidad del nuevo programa denominado Calculadora Matricial. El citado programa se viene usando desde el curso académico 2011-2012, fundamentalmente, en la enseñanza ...
Juan Flaquer +2 more
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Bayesian inverse ensemble forecasting for COVID‐19
Canadian Journal of Statistics, EarlyView.Abstract Variations in strains of COVID‐19 have a significant impact on the rate of surges and on the accuracy of forecasts of the epidemic dynamics. The primary goal for this article is to quantify the effects of varying strains of COVID‐19 on ensemble forecasts of individual “surges.” By modelling the disease dynamics with an SIR model, we solve the ...
Kimberly Kroetch, Don Estep
wiley +1 more source
Qigong exercise enhances cognitive functions in the elderly via an interleukin-6-hippocampus pathway: A randomized active-controlled trial. [PDF]
Brain Behav Immun, 2021 Qi D +7 more
europepmc +1 more source
A partial envelope approach for modelling multivariate spatial‐temporal data
Canadian Journal of Statistics, EarlyView.Abstract In the new era of big data, modelling multivariate spatial‐temporal data is a challenging task due to both the high dimensionality of the features and complex associations among the responses across different locations and time points.
Reisa Widjaja +3 more
wiley +1 more source
Stability of Viscous Three‐Dimensional Stratified Couette Flow via Dispersion and Mixing
Communications on Pure and Applied Mathematics, EarlyView.ABSTRACT This article explores the stability of stratified Couette flow in the viscous 3d$3d$ Boussinesq equations. In this system, mixing effects arise from the shearing background, and gravity acts as a restoring force leading to dispersive internal gravity waves.
Michele Coti Zelati +2 more
wiley +1 more source
TransformaciónEl artículo presenta un análisis de investigaciones relacionadas con la formación de conceptos del álgebra lineal, orientadas desde la teoría “descomposición genética” de Dubinsky y la teoria “representación semiótica” de Duval, con el propósito de ...
Rosa María Almonte Batista +2 more
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Stochastic Gradient Descent in High Dimensions for Multi‐Spiked Tensor PCA
Communications on Pure and Applied Mathematics, EarlyView.ABSTRACT We study the high‐dimensional dynamics of online stochastic gradient descent (SGD) for the multi‐spiked tensor model. This multi‐index model arises from the tensor principal component analysis (PCA) problem with multiple spikes, where the goal is to estimate the unknown signal vectors within the N$N$‐dimensional unit sphere through maximum ...
Gérard Ben Arous +2 more
wiley +1 more source
Una taxonomía de errores en el aprendizaje de espacios vectoriales
Revista Iberoamericana de Educación, 2013 Como docentes de Álgebra Lineal preocupados por algunos errores que aparecen frecuentemente en las producciones de los alumnos, nos propusimos construir una caracterización de esos errores, en el abordaje de los conceptos de espacios vectoriales y ...
Ana Rosso, Julio Barros
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