نتایج جستجو برای: vines and ivies

تعداد نتایج: 16827314  

2013
Wei Wei Jinyan Li Longbing Cao Jingguang Sun Chunming Liu Mu Li

The widely used mean-variance criteria is actually not the optimal solution for asset allocation as the joint distribution of asset returns are distributed in asymmetric ways rather than in the assumed normal distribution. It is a computationally challenging task to model the asymmetries and skewness of joint distributions of returns in high dimensional space due to their own complicated struct...

2016
Marc Fuchs Keith Perry Deborah Golino

Grapevine red blotch-associated virus (GRBaV) was isolated from table and wine grapes, as well as rootstocks, affected by red blotch, a recently recognized viral disease. Phylogenetic analyses revealed the clustering of GRBaV isolates two groups (clades) of genetic variants (Krenz et al., 2014, Al Rwahnih et al., 2015). Producing and using a full-length infectious clone of a representative isol...

2002
Tim Bedford Roger M. Cooke

A new graphical model, called a vine, for dependent random variables is introduced. Vines generalize the Markov trees often used in modelling high-dimensional distributions. They diier from Markov trees and Bayesian belief nets in that the concept of conditional independence is weakened to allow for various forms of conditional dependence. Vines can be used to specify multivariate distributions...

Journal: :BMJ 2021

Grape glycosides are, in part, important aroma and flavor precursors. Their quantification may offer a means of determining the impact viticultural practices, such as leaf removal, on potential wine quality. Fruit zone removal Riesling Chardonnay grapevines grown at two sites for seasons was evaluated its influence total phenol-free grape harvest. Vines were trained to low bilateral cordon syst...

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