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Método heurístico para particionamiento óptimo
Método heurístico para particionamiento óptimo
(2009-02-20)
Many data analysis problems deal with non supervised partitioning of a data set,in non empty clusters well separated between them and homogeneous within the clusters.An ideal partitioning is obtained when any object can ...
Aplicación de la búsqueda tabú en regresión no lineal
Aplicación de la búsqueda tabú en regresión no lineal
(2009-02-20)
We implement the combinatorial optimization technique known as tabu search inthe parameter estimation problem in a given non linear model. For the generationof neighbors, the implementation is based on a discretization of ...
Propiedades de un enfoque difuso para particionamiento con datos bimodales
Propiedades de un enfoque difuso para particionamiento con datos bimodales
(2010-04-09)
It is presented a new fuzzy partitioning criterion for two-mode data and an algo-rithm is formulated for its optmization. We study the convergence properties of themethod. The method was tested on real data. It is ...
Generación de reglas estadísticas a partir de grandes bases de datos
Generación de reglas estadísticas a partir de grandes bases de datos
(2009-02-18)
Given a set of categorical variables, we want to predict one or more of them by the way rules. We propose an algorithm that (i) is guided by statistical results in a relational geometry where we use assymetrical association ...
El Número Equivalente como medida de la Información en Análisis de Datos
(2012-03-28)
Se recuerda la definición del número equivalente, propuesto para medir el número de unidades independientes de información y lo adaptamos al contexto del análisis multivariado de datos. Proponemos algunas propiedades en ...
Definición de semiproductos escalares útiles en análisis de datos
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 ...
Generación de métricas en análisis de datos
(2009-02-20)
In this work we introduce primary generators of metrics, that consist of linearcombinations of known metrics. We establish some theoretical properties of these generators,related to the computation of principal components, ...
Análisis de proximidades métrico usando búsqueda tabú
Análisis de proximidades métrico usando búsqueda tabú
(2009-02-19)
We apply tabu search (TS) in metric multidimensional scaling, obtaining good results comparable to those obtained with simulated annealing. A state in TS is a configuration of n points in a p dimensional space, and a ...
Analyis on the vascular epiphytes of tree ferns in a montane rain forest in Costa Rica
(2009-02-18)
The relationships between epiphytes and host specifity are known. We investigated the relation between specific epiphytes and tree fern trunks. Only some epiphytes are frequent or very frequent on tree ferns. Most of the ...
Nuevas técnicas de particionamiento en clasificación automática
Nuevas técnicas de particionamiento en clasificación automática
(2009-02-18)
In this article there are exposed some new thechniques for hte search of global optima inthe partitioning problem in Cluster Analysis. With these thechniques the results are sensibly improved with respect to the traditional ...