Results 31 to 40 of about 38,249,777 (279)

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

, 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

Estimation of population mean using ranked set sampling in the presence of measurement errors

Kuwait Journal of Science
Ranked set sampling is widely acknowledged for its superior efficiency compared with simple random sampling. Only a small amount of work has been conducted using ranked set sampling when measurement errors are present.
Ahmadini A.A.H., Singh R., Raghav Y.S.
doaj   +1 more source

Kinetic study of the convective drying of spearmint

Journal of the Saudi Society of Agricultural Sciences, 2014
This work presents the kinetic study of the convective drying of Tunisian spearmint in two manners. The traditional protocol which consists in carrying out drying experimental tests at constant temperatures 40–45–50–55 °C and a new protocol which ...
Mourad Ayadi, Salah Ben Mabrouk, Imed Zouari, Ahmed Bellagi   +3 more
doaj   +1 more source

The effect of various conductivity and viscosity models considering Brownian motion on nanofluids mixed convection flow and heat transfer [PDF]

Transport Phenomena in Nano and Micro Scales, 2016
In this paper the effect of using various models for conductivity and viscosity considering Brownian motion of nanoparticles is investigated. This study is numerically conducted inside a cavity full of Water-Al2O3 nanofluid at the case of mixed ...
H. R. Ehteram, A. A. Abbasian Arani, G. A. Sheikhzadeh, A. Aghaei, A. R. Malihi   +4 more
doaj   +1 more source

Conditional Variable Importance for Random Forests [PDF]

, 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, Thomas Kneib, Augustin, Thomas, Achim Zeileis, Boulesteix, Anne-Laure, Thomas Augustin, Strobl Carolin, Strobl, Carolin, Zeileis, Achim, Kneib Thomas, Carolin Strobl, Kneib, Thomas, Boulesteix Anne-Laure, Zeileis Achim, Anne-Laure Boulesteix   +14 more
core   +1 more source

Double Exponential Ratio Estimator of a Finite Population Variance under Extreme Values in Simple Random Sampling

Mathematics
This article presents an improved class of efficient estimators aimed at estimating the finite population variance of the study variable. These estimators are especially useful when we have information about the minimum/maximum values of the auxiliary ...
Umer Daraz, Jinbiao Wu, Olayan Albalawi
doaj   +1 more source

Improved class of estimators of finite population mean using sampling fraction and information on two auxiliary variables in sample surveys

Statistica, 2014
This paper suggested a generalized class of estimators using information on two auxiliary va-riables and sampling fraction in simple random sampling.
Housila P. Singh, Anjana Rathour, Ramkrishna S. Solanki   +2 more
doaj   +1 more source

Optimizing Finite Population Mean Estimation Using Simulation and Empirical Data

Mathematics
Two-phase sampling is an effective sampling approach that is useful in sample surveys when prior auxiliary information is not available. When two variables have an association, the ranks of the auxiliary variable are proportional to the study variable ...
Abdulaziz S. Alghamdi, Fatimah A. Almulhim   +1 more
doaj   +1 more source

Solid Pseudopapillary Neoplasm of the Pancreas in Children and Adolescents: Expert Recommendations

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low‐grade malignant exocrine pancreatic tumor, mostly discovered during the second decade of life in females, with a very good prognosis, provided microscopically complete surgical excision is achieved.
Sabine Irtan, Michael Abele, Calogero Virgone, Michaela Kuhlen, Ricardo Lopez‐Almarez, Tal Ben‐Ami, Ewa Bien, Maja Cesen, Malgorzata A. Krawczyk, Andrea Ferrari, Gianni Bisogno, Yves Reguerre, Dominik T. Schneider, Louise Galmiche, Jorg Fuchs, Sarah Braungart, Bilgehan Yalcin, Ines B. Brecht, Daniel Orbach   +18 more
wiley   +1 more source

Enhanced estimation of population mean via exponential-type estimator using dual auxiliary inputs

Applied Mathematics in Science and Engineering
Without having to interview every person, we may draw conclusions about the whole population by estimating the population mean, a fundamental summary statistic that is obtained from a sample.
Poonam Singh, Pooja Maurya, Prayas Sharma   +2 more
doaj   +1 more source