Quadratic Discriminant Analysis
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Validade da estrutura fatorial da escala de versão brasileira do Food Choice Questionnaire
Resumo Este estudo examinou a estrutura dimensional e a confiabilidade da versão em português brasileiro do Food Choice Questionnaire (FCQ) de 36 itens, instrumento utilizado para medir a importância dos motivos que levam às escolhas alimentares. A amostra incluiu 502 adultos. Utilizou-se análises fatoriais confirmatórias (AFC) para avaliar a estrutura
Ciênc. saúde coletiva. Publicado em: 09/09/2019
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2. Validade e confiabilidade da versão brasileira da Johns Hopkins Fall Risk Assessment Tool para avaliação do risco de quedas
RESUMO: Objetivo: Avaliar a validade e a confiabilidade da escala Johns Hopkins Fall Risk Assessment Tool (JH-FRAT) para avaliação do risco de quedas em pacientes hospitalizados. Método: Estudo retroativo com 297 pacientes de um hospital privado de São Paulo usando dados de 2014. A validade foi avaliada por meio da acurácia (sensibilidade, especific
Rev. bras. epidemiol.. Publicado em: 29/04/2019
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3. Principal Component Analysis with Linear and Quadratic Discriminant Analysis for Identification of Cancer Samples Based on Mass Spectrometry
Mass spectrometry (MS) is a powerful technique that can provide the biochemical signature of a wide range of biological materials such as cells and biofluids. However, MS data usually has a large range of variables which may lead to difficulties in discriminatory analysis and may require high computational cost. In this paper, principal component analysis wi
J. Braz. Chem. Soc.. Publicado em: 2018-03
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4. Distinção entre cachaças destiladas em alambiques e em colunas usando quimiometria
One hundred fifteen cachaça samples derived from distillation in copper stills (73) or in stainless steels (42) were analyzed for thirty five itens by chromatography and inductively coupled plasma optical emission spectrometry. The analytical data were treated through Factor Analysis (FA), Partial Least Square Discriminant Analysis (PLS-DA) and Quadratic Di
Química Nova. Publicado em: 2009
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5. AnÃlise discriminante clÃssica e de nÃcleo: avaliaÃÃes e algumas contribuiÃÃes relativas aos mÃtodos Boosting e Bootstrap
Since information technology is essential for many activities of modern life and massive data sets come with it, data mining has become one of the most important research topics in statistical science. Even thought there are many fields related to data mining, the task of classification still remain as one of the most common in statistical literature. This d
Publicado em: 2007
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6. Noninvasive classification of liver disease in asymptomatic and oligosymptomatic male alcoholics
The predominant type of liver alteration in asymptomatic or oligosymptomatic chronic male alcoholics (N = 169) admitted to a psychiatric hospital for detoxification was classified by two independent methods: liver palpation and multiple quadratic discriminant analysis (QDA), the latter applied to two parameters reported by the patient (duration of alcoholism
Brazilian Journal of Medical and Biological Research. Publicado em: 2003-10
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7. Identification of protein coding regions in the human genome by quadratic discriminant analysis
A new method for predicting internal coding exons in genomic DNA sequences has been developed. This method is based on a prediction algorithm that uses the quadratic discriminant function for multivariate statistical pattern recognition. Substantial improvements have been made (with only 9 discriminant variables) when compared with existing methods: hexon [S
The National Academy of Sciences of the USA.
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8. Splice site prediction with quadratic discriminant analysis using diversity measure
Based on the conservation of nucleotides at splicing sites and the features of base composition and base correlation around these sites we use the method of increment of diversity combined with quadratic discriminant analysis (IDQD) to study the dependence structure of splicing sites and predict the exons/introns and their boundaries for four model genomes:
Oxford University Press.
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9. Novel approach to bacterial identification that uses the autobac system.
A new system for the rapid identification of gram-negative bacilli on the Autobac system is described. This system utilizes growth inhibition profiles to a panel of differentially inhibitory chemical agents. These profiles are analyzed with a two-stage quadratic discriminant analysis to arrive at the organism identification. The system identifies 30 differen
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10. Automated, rapid identification of bacteria by pattern analysis of growth inhibition profiles obtained with Autobac 1.
A scheme for identifying bacteria has been devised which utilizes the inhibition patterns obtained by Autobac 1 with routine and unusual antimicrobial agents and with other differentially inhibitory chemical compounds. Over 600 compounds were initially identified from the literature, and over 125 of these were selected for further testing on the basis of ant
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11. Identification of Human Gene Core Promoters in Silico
Identification of the 5′-end of human genes requires identification of functional promoter elements. In silico identification of those elements is difficult because of the hierarchical and modular nature of promoter architecture. To address this problem, I propose a new stepwise strategy based on initial localization of a functional promoter into a 1- to 2
Cold Spring Harbor Laboratory Press.
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12. Accuracy and precision of the autobac system for rapid identification of Gram-negative bacilli: a collaborative evaluation.
Gram-negative bacilli were identified within 3 to 6 h by determining susceptibility to 18 different antibacterial agents in the Autobac I system and by applying a two-stage quadratic discriminant analysis to the susceptibility patterns. The Autobac system was compared with standard reference methods for identifying glucose nonfermenters and glucose fermenter