On the Suitability of Genetic-Based Algorithms for Data Mining

Data mining has as goal to extract knowledge from large databases. A database may be considered as a search space consisting of an enormous number of elements, and a mining algorithm as a search strategy. In general, an exhaustive search of the space is infeasible. Therefore, efficient search strategies are of vital importance. Search strategies on genetic-based algorithms have been applied successfully in a wide range of applications. We focus on the suitability of genetic-based algorithms for data mining. We discuss the design and implementation of a genetic-based algorithm for data mining and illustrate its potentials

Closed Expressions for Lie Algebra Invariants and Finite Transformations

A simple procedure to obtain complete, closed expressions for Lie algebra invariants is presented. The invariants are ultimately polynomials in the group parameters. The construction of finite group elements require the use of projectors, whose coefficients are invariant polynomials. The detailed general forms of these projectors are given. Closed expressions for finite Lorentz transformations, both homogeneous and inhomogeneous, as well as for Galilei transformations, are found as examples.Comment: 34 pages, ps file, no figure

Estimativas de curvas de crescimento na produção animal.

bitstream/CPPSE/17106/1/Documentos68.pdfISSN 1980-684

Heterogeneidade de variância e transformação logaritimica em dados de pesos de bovinos.

Uma suposição requerida nas metodologias usadas para estimar parâmetros genéticos e a homogeneidade de variância dentro dos níveis de efeitos fixos e aleatórios. Como e usual a ocorrência de heterogeneidade, a analise dos dados na escala logaritmica (Log) tem sido utilizada para estabilizar as variancias.Este trabalho objetivou estudar a influencia da analise de dados originais e log na estimativa de componentes de variância entre touros e residuais e herdabilidade