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Mostrando ítems 11-20 de 13698
An Experimental Study on Microarray Expression Data from Plants under Salt Stress by using Clustering Methods
Current Genome-wide advancements in Gene chips technology provide in the “Omics (genomics, proteomics and transcriptomics) research”, an opportunity to analyze the expression levels of thousand of genes across multiple ...
A model for clustering data from heterogeneous dissimilarities
(Elsevier, 2020)
How Many Clusters: A Validation Index for Arbitrary-Shaped Clusters
(IEEE Computer Society, 2013-04)
Clustering validation indexes are intended to assess the goodness of clustering results. Many methods used to estimate the number of clusters rely on a validation index as a key element to find the correct answer. This paper ...
Automatic aspect discrimination in data clustering
(ELSEVIER SCI LTDOXFORD, 2012)
The attributes describing a data set may often be arranged in meaningful subsets, each of which corresponds to a different aspect of the data. An unsupervised algorithm (SCAD) that simultaneously performs fuzzy clustering ...
Clusterings Hierárquicos em Networks e Aplicações
(Universidade Estadual Paulista (Unesp), 2019-02-18)
Neste trabalho estudamos networks e métodos de Clustering Hierárquico de forma axiomática. Apresentamos alguns programas na linguagem Python aplicados à análise de dados de migração populacional, com o intuito de ilustrar ...
New measurements of radial velocities in clusters of galaxies-V
(EDP SCIENCES S A, 2010)
As a part of our galaxy-cluster redshift survey, we present a set of 79 new velocities in the 4 clusters Abell 376, Abell 970, Abell 1356, and Abell 2244, obtained at Haute-Provence observatory. This set now completes our ...
A new index for clustering validation with overlapped clusters
(Pergamon-Elsevier Science Ltd, 2016-08)
External validation indexes allow similarities between two clustering solutions to be quantified. With classical external indexes, it is possible to quantify how similar two disjoint clustering solutions are, where each ...
The clusters Abell 222 and Abell 223: a multi-wavelength view
(EDP SCIENCES S A, 2010)
Context. The Abell 222 and 223 clusters are located at an average redshift z similar to 0.21 and are separated by 0.26 deg. Signatures of mergers have been previously found in these clusters, both in X-rays and at optical ...
An algorithm based on density and compactness for dynamic overlapping clustering
(Elsevier Ltd., 2013)