نتایج جستجو برای: multivariate exchangeable normal distribution

تعداد نتایج: 1237223  

2006
Florence Wu Emiliano A. Valdez Michael Sherris

Multivariate exchangeable Archimedean copulas are one of the most popular classes of copulas that are used in actuarial science and finance for modelling risk dependencies and for using them to quantify the magnitude of tail dependence. Owing to the increase in popularity of copulas to measure dependent risks, generating multivariate copulas has become a very crucial exercise. Current methods f...

Journal: :Bernoulli : official journal of the Bernoulli Society for Mathematical Statistics and Probability 2014
Peter D Hoff Xiaoyue Niu Jon A Wellner

Often of primary interest in the analysis of multivariate data are the copula parameters describing the dependence among the variables, rather than the univariate marginal distributions. Since the ranks of a multivariate dataset are invariant to changes in the univariate marginal distributions, rank-based estimators are natural candidates for semiparametric copula estimation. Asymptotic informa...

محمدحسن علی‌نیا, , مسعود کاووسی, , مریم پیکان, , ناصر دوات‌گر, ,

The soil potassium status and effect of soil physical and chemical properties on it were investigated using 109 surface soils (0-30cm) from four regions in Guilan province. Neutral molar ammonium acetate extractable K (K-NH4OAc), boiling molar nitric acid extractable K (K-HNO3) and water soluble K were determined. Results showed that CEC and clay were normally frequency distributed while distri...

Journal: :The Annals of Mathematical Statistics 1948

Journal: :The Annals of Mathematical Statistics 1956

ژورنال: علوم آب و خاک 2006
محمدحسن علی‌نیا, , مسعود کاووسی, , مریم پیکان, , ناصر دوات‌گر, ,

The soil potassium status and effect of soil physical and chemical properties on it were investigated using 109 surface soils (0-30cm) from four regions in Guilan province. Neutral molar ammonium acetate extractable K (K-NH4OAc), boiling molar nitric acid extractable K (K-HNO3) and water soluble K were determined. Results showed that CEC and clay were normally frequency distributed while distri...

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