Density Probability Function
Mostrando 1-12 de 89 artigos, teses e dissertações.
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1. Practical rules for summing the series of the Tweedie probability density function with high-precision arithmetic
Abstract: For some ranges of its parameters and arguments, the series for Tweedie probability density functions are sometimes exceedingly difficult to sum numerically. Existing numerical implementations utilizing inversion techniques and properties of stable distributions can cope with these problems, but no single one is successful in all cases. In this wor
An. Acad. Bras. Ciênc.. Publicado em: 02/12/2019
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2. A smooth path to plot hydrogen atom via Monte Carlo method
Abstract In this paper, we show how to build a basic computer program using the Monte Carlo method to display the hydrogen atomic orbitals. For this, in a heuristic way, we applied a von Neumann acceptance-rejection method in simple problems of potential wells, and we end with the hydrogen orbitals representation. In this technique, we spread points uniforml
Rev. Bras. Ensino Fís.. Publicado em: 22/07/2019
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3. Distribuição do diâmetro de copa e diâmetro quadrático de Araucaria angustifolia e Pinus taeda
Resumo As funções de densidade de probabilidade têm várias aplicações florestais, entre as quais o tratamento de dados biométricos e uso em modelagem. O objetivo deste estudo foi verificar qual função densidade de probabilidade melhor se ajusta ao diâmetro de copa (dcopa) e ao diâmetro quadrático (dq), e também analisar o efeito dessas variávei
Ciênc. Florest.. Publicado em: 30/05/2019
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4. Probability Analysis in Determining the Behaviour of Variable Amplitude Strain Signal Based on Extraction Segments
Abstract This paper focuses on analysis in determining the behaviour of variable amplitude strain signals based on extraction of segments. The constant Amplitude loading (CAL), that was used in the laboratory tests, was designed according to the variable amplitude loading (VAL) from Society of Automotive Engineers (SAE). The SAE strain signal was then edited
Lat. Am. j. solids struct.. Publicado em: 2017-12
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5. Multidisciplinary Design Optimization of UAV Under Uncertainty
ABSTRACT: Uncertainty-based multidisciplinary design optimization considers probabilistic variables and parameters and provides an approach to account for sources of uncertainty in design optimization. The aim of this study was to apply a decoupling uncertainty-based multidisciplinary design optimization method without any dependence on probability mathemati
J. Aerosp. Technol. Manag.. Publicado em: 2017-06
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6. THE COMPOSED ZERO TRUNCATED LINDLEY-POISSON DISTRIBUTION
ABSTRACT In this paper, a new compounding distribution, named zero truncated Lindley-Poisson distribution is introduced. The probability density function, cumulative distribution function, survival function, failure rate function and quantiles expressions of it are provided. The parameters estimatives were obtained by six methods: maximum likelihood (MLE), o
Pesqui. Oper.. Publicado em: 2016-12
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7. The Effect of Material Property on the Critical Velocity of Randomly Excited Nonlinear Axially Travelling Functionally Graded Plates
Abstract In this paper, the critical axial speeds of three types of sigmoid, power law and exponential law functionally graded plates for both isotropic and orthotropic cases are obtained via a completely analytic method. The plates are subjected to lateral white noise excitation and show evidence of large deformations. Due to randomness, the conventional de
Lat. Am. j. solids struct.. Publicado em: 2016-01
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8. Assessing biomass based on canopy height profiles using airborne laser scanning data in eucalypt plantations
This study aimed to map the stem biomass of an even-aged eucalyptus plantation in southeastern Brazil based on canopy height profile (CHPs) statistics using wall-to-wall discrete return airborne laser scanning (ALS), and compare the results with alternative maps generated by ordinary kriging interpolation from field-derived measurements. The assessment of st
Sci. agric. (Piracicaba, Braz.). Publicado em: 2015-12
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9. Probabilistic analysis of stress intensity factor (SIF) and degree of bending (DoB) in axially loaded tubular K-joints of offshore structures
Abstract The stress intensity factor (SIF) and the degree of bending (DoB) are among the crucial parameters in evaluating the fatigue reliability of offshore tubular joints based on the fracture mechanics (FM) approach. The value of SIF is a function of the crack size, nominal stress, and two modifying coefficients known as the crack shape factor (Yc) and ge
Lat. Am. j. solids struct.. Publicado em: 2015-11
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10. A Modified Computational Scheme for the Stochastic Perturbation Finite Element Method
Abstract A modified computational scheme of the stochastic perturbation finite element method (SPFEM) is developed for structures with low-level uncertainties. The proposed scheme can provide second-order estimates of the mean and variance without differentiating the system matrices with respect to the random variables. When the proposed scheme is used, it i
Lat. Am. j. solids struct.. Publicado em: 2015
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11. A distribuição log-logística exponenciada geométrica: dupla ativação / The exponentiated log-logistic geometric distribution: dual activation
In this work, we propose a new distribution with four parameters the so called exponentiated log-logistic geometric distribution based on a double mechanism of activation for modeling lifetime data. For this new distribution, we study the density function, cumulative distribution, survival function and the failure rate function which allows major harzad rate
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/09/2012
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12. PROBABILIDADE DE OCORRÊNCIA DE DEFICIÊNCIA HÍDRICA NA CULTURA DO GIRASSOL NA REGIÃO CENTRAL DO RIO GRANDE DO SUL / OCCURRENCE PROBABILITY OF WATER DEFICIT IN SUNFLOWER CROP IN THE CENTRAL REGION OF RIO GRANDE DO SUL
No Brasil nos últimos anos elevou-se o interesse pelo cultivo do girassol. Quando submetida à deficiência hídrica a cultura do girassol apresenta redução na produtividade. Para contornar esse problema, é necessário calcular a provável deficiência hídrica nos subperíodos críticos e no ciclo de desenvolvimento do girassol para cada uma das diferen
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 09/03/2012