Kurtosis
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. Dynamics of Eucalyptus Diameter Distribution in the State of Minas Gerais
ABSTRACT The aim of this study was to evaluate the effects of age, site, and density factors on the dynamics of eucalyptus diameter distribution. Data were obtained from a continuous forest inventory measured at different occasions, stratified according to the factors evaluated and adjusted by the three-parameter Weibull function using nonthinned clonal plo
Floresta Ambient.. Publicado em: 04/04/2019
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2. Slash Spatial Linear Modeling: Soybean Yield Variability as a Function of Soil Chemical Properties
ABSTRACT: In geostatistical modeling of soil chemical properties, one or more influential observations in a dataset may impair the construction of interpolation maps and their accuracy. An alternative to avoid the problem would be to use most robust models, based on distributions that have heavier tails. Therefore, this study proposes a spatial linear model
Rev. Bras. Ciênc. Solo. Publicado em: 15/02/2018
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3. Dental Management Survey Brazil (DMS-BR): creation and validation of a management instrument
Abstract Questionnaires for the assessment of knowledge and self-perception can be useful to diagnose what a dentist knows about management and administration. The aim of the present study was to create and validate the Dental Management Survey Brazil (DMS-BR) scale, based on meetings with experts in the field. After having elaborated the first version, 10 a
Braz. oral res.. Publicado em: 10/04/2017
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4. Zoning of environmental conditions inside a wean-to-finish pig facility
ABSTRACT Using geostatistics, this study aimed to analyze environmental conditions for wean-to-finish swines at 3 pm, during the most sensitive phases to thermal stress (growth/ finishing and finishing). To this end, dry-bulb temperature, relative humidity, air speed, ammonia and carbon dioxide concentrations were measured at 81 equidistant points within the
Eng. Agríc.. Publicado em: 2016-10
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5. A classification proposal for coefficients of variation in Eucalyptus experiments involving survival, growth and wood quality variables
ABSTRACT The objective of this study was to present a classification proposal for coefficients of variation (CV) in Eucalyptus experiments, aiming at providing a useful tool for experiments involving growth, survival and wood quality traits. Ninety-four studies were selected from a search for peer-reviewed journals yielding a total of 508 data. The CVs were
Bragantia. Publicado em: 06/05/2016
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6. Spatial distribution of feces and estimates of nitrogen return by dairy cows on mombasa grass pastures
The objective of this study was to identify the pattern of deposition of feces by supplemented crossbred dairy cows after the lactation peak on cultivated areas under levels of intensification of the system and its effects on nitrogen cycling, with the aid of geostatistics, in the rainy period. Treatments were composed of two levels of nitrogen fertilization
R. Bras. Zootec.. Publicado em: 2013-05
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7. CONES DE ASSIMETRIA E CURTOSE NO MERCADO BRASILEIRO DE OPÇÕES DE COMPRA DE AÇÕES: UMA ANÁLISE DOS CONES DE VOLATILIDADE PERANTE A VOLATILIDADE IMPLÍCITA CALCULADA PELOS MODELOS DE CORRADO-SU E BLACK-SCHOLES / SKEWNESS AND KURTOSIS CONES ON BRAZILIAN STOCK CALL OPTIONS MARKET: AN ANALYSIS OF VOLATILITY CONES BEYOND IMPLIED VOLATILITY CALCULATED BY CORRADO-SU AND BLACK-SCHOLES MODELS
O presente estudo tem como objetivo mostrar a existência de cones de assimetria e curtose no mercado brasileiro de opções. Além disso, os coeficientes de assimetria e curtose são de suma importância para a aplicação do modelo de Corrado e Su (1996). As volatilidades implícitas calculadas pelo método inverso deste modelo serão sobrepostas aos cones
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/03/2012
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8. Statistical analysis of acoustic emission signals generated during turning of a metal matrix composite
Acoustic emission technique (AET) has been used to monitor the progress of tool wear during turning of silicon carbide (20 wt.%) dispersed Al alloy metal matrix composite. Acoustic emission (AE) signals generated beyond a specific cutting distance increase abruptly. Statistical analysis based on assumed β distribution of AE energy showed that skewness and k
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-06
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9. Variação geográfica de Hylaeamys yunganus (Thomas, 1902) na América do Sul (Rodentia: Sigmodontinae) / Geographic variation and phylogeography of Hylaeamys yunganus (Thomas, 1902) (Rodentia: Sigmodontinae)
Hylaeamys yunganus is a rodent of the Oryzomyini tribe presenting samples distributed through the Amazon rainforests and occupies a wide altitudinal gradient, which extends from sea level up to ca. 2,000m. Information available in the literature suggests that populations of H. yunganus from Venezuela, Colombia, Ecuador, Peru and western Brazil have large bod
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/09/2011
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10. Análise da estacionariedade e gaussianidade da atividade elétrica neural, do ruído biológico e do ruído de instrumentação
This work analyzes signals of spontaneous neuronal electrical activity, measured by devices known as Multi-Electrode Arrays (MEA), which are the substrate of neuronal cultures of rat hippocampus. The database under investigation consists of five signals: (i) instrumentation noise, (ii) biological noise, (iii) inactive culture and (iv) two active culture expe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/07/2011
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11. Distribuições em série de potências modificadas inflacionadas e distribuição Weibull binominal negativa / Inflated modified power serie distribution and Weibull negative binomial
In this paper, some result such as moments generating function, recurrence relations for moments and some theorems of the class of modified power series distributions (MPSD) proposed by Gupta (1974) and of the class of inflated modified power series distributions (IMPSD) both at a different point of zero as the zero point are presented. The standard Poisson
Publicado em: 2011
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12. As distribuições Kumaraswamy-log-logística e Kumaraswamy-logística / Distributions Kumaraswamy-log-logistic and Kumaraswamy-logistic
In this work, are presented two new probability distributions, obtained from two generalization methods of the log-logistic distribution, with two parameters (LL (?, ?)). The first method described in Marshall e Olkin (1997) turns the new distribution, now with three parameters, called modified log-logistic distribution (LLM(v, ?, ?)). This distribution is m
Publicado em: 2010