Results 11 to 20 of about 3,327,271 (332)

Random Forest variable importance with missing data [PDF]

open access: yes, 2012
Random Forests are commonly applied for data prediction and interpretation. The latter purpose is supported by variable importance measures that rate the relevance of predictors. Yet existing measures can not be computed when data contains missing values.
Hapfelmeier, Alexander   +2 more
core   +1 more source

The Elasticity of a Random Variable as a Tool for Measuring and Assessing Risks

open access: yesRisks, 2022
Elasticity is a very popular concept in economics and physics, recently exported and reinterpreted in the statistical field, where it has given form to the so-called elasticity function.
Ernesto-Jesús Veres-Ferrer   +1 more
doaj   +1 more source

Fuzzy random variables

open access: yesJournal of Mathematical Analysis and Applications, 1986
In a previous paper [ibid. 91, 552-558 (1983; Zbl 0528.54009)] the authors defined differentials for a fuzzy valued function. In this clearly thought and well-written paper they define an integral, or an expected value, of a fuzzy valued random variable. The definition is based on the integral of a set-valued function.
Puri, Madan L, Ralescu, Dan A
openaire   +2 more sources

Approximation of probability density functions for PDEs with random parameters using truncated series expansions

open access: yes, 2020
The probability density function (PDF) of a random variable associated with the solution of a partial differential equation (PDE) with random parameters is approximated using a truncated series expansion.
Capodaglio, Giacomo   +2 more
core   +1 more source

An extension to the Wiener space of the arbitrary functions principle [PDF]

open access: yes, 2006
The arbitrary functions principle says that the fractional part of $nX$ converges stably to an independent random variable uniformly distributed on the unit interval, as soon as the random variable $X$ possesses a density or a characteristic function ...
Bouleau, Nicolas
core   +6 more sources

Calculation of the residual bearing capacity of reinforced concrete beams by the rigidity (deflection) criterion

open access: yesИнженерно-строительный журнал, 2015
The article proposes the method of calculating the bearing capacity of reinforced concrete beams at the operational stage by the rigidity (deflection) criterion. The methods, which were used in the article, are integral test and probabilistic methods for
V.S. Utkin, S.A. Solovyov
doaj   +1 more source

Binary and Ordinal Random Effects Models Including Variable Selection [PDF]

open access: yes, 2010
A likelihood-based boosting approach for fitting binary and ordinal mixed models is presented. In contrast to common procedures it can be used in high-dimensional settings where a large number of potentially influential explanatory variables is available.
Groll, Andreas, Tutz, Gerhard
core   +1 more source

Variable selection with Random Forests for missing data [PDF]

open access: yes, 2013
Variable selection has been suggested for Random Forests to improve their efficiency of data prediction and interpretation. However, its basic element, i.e.
Hapfelmeier, Alexander, Ulm, Kurt
core   +1 more source

Conditional variable importance for random forests

open access: yesBMC Bioinformatics, 2008
Background Random forests are becoming increasingly popular in many scientific fields because they can cope with "small n large p" problems, complex interactions and even highly correlated predictor variables.
Augustin Thomas   +4 more
doaj   +1 more source

Random variable functions used in hydrology

open access: yesSelecciones Matemáticas, 2019
In this work, expressions of the cumulative distribution function of Y X, Y/X and X/(X + Y ) for continuous dependent random variables with supported on a unbounded and bounded interval are derived.
Cira E. G. Otiniano, Yuri S. Maluf
doaj   +1 more source

Home - About - Disclaimer - Privacy