Listar Revista de Matemática: Teoría y Aplicaciones por título
Mostrando ítems 84-103 de 319
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Curvas ROC y Vecinos Cercanos, Propuesta de un Nuevo Algoritmo de Condensación
(2011-03-18)k-NN criteria are non parametric methods of statistical classificaction. They are accurate, versatile and distribution free. However, their computational cost may be too expensive; especially for large sample sizes. We ... -
De la fórmula de sumación de Poisson a los teoremas de muestreo y reconstrucción
(2012-03-22)Los radioastrónomos miden la visibilidad de una fuente luminosa para determinar la cantidad de luz emitida y su distribución, bajo el principio que esta es la transformada de Fourier de la visibilidad. En la teoría de la ... -
Definición de semiproductos escalares útiles en análisis de datos
(2009-02-20)We develop the theory necessary for Data Analysis with inner semiproducts, extendingtha classical concepts of inner products usually employed. For this, we usethe basic algebraic definitions of non degenerated bilinear ... -
Deformaciones isométricas infinitesimales de superficies multidimensionales ensambladas
(2012-04-26)The article introduces the concept of multidimensional pasted surfaces and considers the case of different dimensions in the surfaces to be pasted. Infinitesimal deformations of such surfaces are also considered. In a ... -
Deformaciones isométricas infinitesimales de una clase de superficies pegadas
(2009-02-20)In this work the sufficient condition of rigidity of a stuck 4-dimensional surface inthe Euclidean 6-dimensional space is demonstrated. This surface represents in himself,the product of Riemann of two surfaces, each one ... -
Dengue model with early-life stage of vectors and age-structure within host
(2019-12)We construct an epidemic model for the transmission of dengue fever with an early-life stage in the vector dynamics and age-structure within hosts. The early-life stage of the vector is modeled via a general function that ... -
Descomposición de procesos de incrementos independientes en casi intervalos
(2009-02-18)We introduce the notion independent increment in quasi-intervals. Some properties of the fixed points of these processes are studied, as well as those of the aditive descomposition. Finally, we establish the relation between ... -
Descripción de dos métodos de rellenado de datos ausentes en series de tiempo meteorológicas
(2009-02-27)Se presentan dos metodolog´?as para el rellenado de datos ausentes, enfocadas haciasu uso en series de tiempo geof´?sicas. La primera se basa en la descomposici´on encomponentes principales de la matriz de correlaci´on de ... -
Detecting constraint redundancy in 0-1 linear programming problems
(2009-02-19)In this paper we present a procedure for obtaining upper bounds on a linear function by means of certain families of packings, coverings and special ordered sets. We also present a new method for detecting redundant ... -
Detection of unobserved heterogeneity with growth mixture models
(2009-02-27)Latent growth curve models as structural equation models are extensively discussedin various research fields (Duncan et al., 2006). Recent methodological and statisticalextension are focused on the consideration of unobserved ... -
Dice, sticks, pixels and bits: didactic alternatives to explore the methodology of Monte Carlo in a ludic tone
(2013-08-29)This paper presents didactic strategies in a ludic tone to explore the methodology of Monte Carlo and analizes the implementations that have been performed in several educational scenarios. These proposals allow us to put ... -
Differentially closed fields of characteristic zero with a generic automorphism
(2009-02-25)Hrushovski showed that the theory of difference-differential fields of characteristiczero has a model-companion, which we shall denote DCFA. We give an axiomatizationfor DCFA and prove some important model-theoretic results ... -
Dinámica de una huella plana turbulenta alejada
(2009-02-18)From the conservation equation of the quantity of movement and the kinetic energy of the studied turbulence, the dynamics of flat and turbulent path in a non comprehensive liquid environment. In the case of a liquid flow ... -
Dynamics of a two-dimensional discrete-time SIS model
(2012-04-26)We analyze a two-dimensional discrete-time SIS model with a non-constant total population. Our goal is to determine the interaction between the total population, the susceptible class and the infective class, and the ... -
El "unravelling" para bigráficas diferenciales
(2009-02-18)Here are examined the main properties of the algorithm called ¨unravelling¨ for differential bigraphs. This algorithm was originally developed for differential graded categories and was useful in the proof the celebrated ... -
El Análisis de la Variación Estacional en Medicina
(2012-03-08)This is a survey of recent methods for the analysis of seasonal variation in medical research. These methods are effective even when the data show small amplitude and the sample size is small, two characteristics that are ... -
El análisis multivariado de datos como herramienta en la exploración de modelos en la comprensión de variables psicológicas
(2012-04-26)Psychology, as a behavioral science in a preparadigmathic state, needs the support of theoretical models that validate the constructs that it uses for explaining the phenomena it studies. For sustaining the advances in the ... -
El espacio cociente y algunas propiedades geométricas de los espacios de Banach
(2009-02-18)We state some geometric properties of Banach spaces, such as uniformly convex spaces, uniformly non-square spaces, local uniformly convex spaces, strictly convex spaces, etc., and we analyze the problem of translating such ... -
El método Statis como alternativa para detectar "response shift" en estudios de calidad de vida relacionada con la salud
(2009-02-27)After evaluating problems in conceptualisation of Quality of Life outcomes andestablishing an operational definition of HRQoL, we focus the attention on the different dimensions of Response Shift and the theoretical Models ... -
El nuevo orden mundial y el Consejo de Seguridad de las Naciones Unidas
(2009-02-18)The quota power of UN Security Council members are analysed from a mathematical point of view, using Game Theory. Results are generalized and applied to the current situation. Some recommendations are stated about the ...