Results 11 to 20 of about 3,864,284 (197)

Numerical study on flow past an oscillating plate with variable temperature and uniform mass diffusion under chemical reaction

open access: yesInternational Journal of Applied Mechanics and Engineering, 2014
An numerical study on an unsteady flow past an oscillating semi-infinite vertical plate with variable temperature and uniform mass diffusion under the influence of a first order chemical reaction has been carried out.
A.R. Vijayalakshmi, M. Selvajayanthi
doaj   +2 more sources

A numerical study on impact and compression after impact behaviour of variable angle tow laminates [PDF]

open access: yes, 2013
Recent developments of variable angled tow (VAT) technology have indicated that variable stiffness composite laminates offer a strong potential for structural tailoring.
Dang, Thi D., Hallett, Stephen R.
core   +1 more source

Conditional Variable Importance for Random Forests [PDF]

open access: yes, 2008
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. Their variable importance measures have recently been
Augustin Thomas   +14 more
core   +1 more source

A chain ratio exponential type estimator in two-phase sampling using auxiliary information

open access: yesStatistica, 2014
This paper advocates the problem of estimating the population meanĀ of the study variable y using the information on two auxiliary variables x and z. We have suggested the family of chain ratio exponential type estimators in two-phase (or double) sampling.
Rohini Yadav   +3 more
doaj   +1 more source

Derived variables for longitudinal studies [PDF]

open access: yesProceedings of the National Academy of Sciences, 1999
Suppose that for each individual a vector of features is measured at a number of time points. We look for a transformation of the features, the same at all time points, that will induce a simple dependency structure. In the simplest situation this requires that a certain asymmetric matrix has real nonzero eigenvalues. Extensions are considered.
Cox, D. R., Wermuth, Nanny
openaire   +4 more sources

Photometric studies of be star variability [PDF]

open access: yesExperimental Astronomy, 1994
Be stars are hot stars which have shown emission in at least one Balmer line on at least one occasion. As the definition implies, the Be phenomenon can be variable with time: on time scales of days to decades as the circumstellar disc develops and disperses; on time scales of days to months in a few Be stars which are interacting binaries; on time ...
openaire   +1 more source

Estimation of Population Mean under logarithmic for the Poisson Distributed Study and Auxiliary Variates

open access: yes, 2020
: Use of suitable auxiliary information is always suggested in literature at the planning and estimation stage to make the estimators more powerful in terms of efficiency.
Khare, Supriya; Banaras Hindu University   +2 more
core   +1 more source

Bias in Random Forest Variable Importance Measures: Illustrations, Sources and a Solution [PDF]

open access: yes, 2006
Variable importance measures for random forests have been receiving increased attention as a means of variable selection in many classification tasks in bioinformatics and related scientific fields, for instance to select a subset of genetic markers ...
Zeileis, Achim   +11 more
core   +1 more source

A geoadditive Bayesian latent variable model for Poisson indicators [PDF]

open access: yes, 2006
We introduce a new latent variable model with count variable indicators, where usual linear parametric effects of covariates, nonparametric effects of continuous covariates and spatial effects on the continuous latent variables are modelled through a ...
Fahrmeir, Ludwig, Steinert, Sven
core   +1 more source

The age of cataclysmic variables: A kinematical study [PDF]

open access: yesJournal of End-to-End-testing, 2010
32 pages, 11 figures and 4 tables, accepted for publication in New ...
Ak, T.   +4 more
openaire   +3 more sources

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