نتایج جستجو برای: stratified random sampling method was used

تعداد نتایج: 5979659  

2014
Michael D. Shields

Monte Carlo simulation provides the benchmark for computational methods in reliability assessment in terms of both accuracy and robustness. However, Monte Carlo methods are well-known to be computationally expensive and, in many cases, intractable. Several improvements have been proposed to increase their computational efficiency for reliability analysis including Latin hypercube sampling; see ...

Bahareh Arjmand Siahpoush Dariush Rezapour, Eshagh Arjmand Siahpoush

Aggression is universal behavior that can be seen in all cultures and the most common behavioral problems in adolescence and young adulthood which can cause discomfort and distress of adolescents and young people and those around them. This research aim to survey of some social and individual factors influencing the tendency to aggression among youth in Deylam city. The methodology of this stud...

Journal: :Pattern Recognition 2013
Yunming Ye Qingyao Wu Joshua Zhexue Huang Michael K. Ng Xutao Li

For high dimensional data a large portion of features are often not informative of the class of the objects. Random forest algorithms tend to use a simple random sampling of features in building their decision trees and consequently select many subspaces that contain few, if any, informative features. In this paper we propose a stratified sampling method to select the feature subspaces for rand...

Journal: :کشاورزی (منتشر نمی شود) 0
اسماعیل فلاحی کارشناس ارشد، گروه اقتصاد کشاورزی، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران امیرحسین چیذری استادیار، گروه اقتصاد کشاورزی، دانشکده کشاورزی، دانشگاه تربیت مدرس، تهران

breakeven analysis is one of the most important existent tools for decision-making in agriculture. this technique used for analysis of different budget components about irrigated wheat crop in marvdasht township. the required data and information were collected via 154 questionnaires and using the stratified random sampling method during 2004-2005. results show that farmer's profit (rls. 4...

2006
Zhiqiang TAN Z. TAN

This article considers Monte Carlo integration under rejection sampling or Metropolis-Hastings sampling. Each algorithm involves accepting or rejecting observations from proposal distributions other than a target distribution. While taking a likelihood approach, we basically treat the sampling scheme as a random design, and define a stratified estimator of the baseline measure. We establish tha...

2009
Yongsong Qin Changbao Wu

Gini coefficient is among the most popular and widely used measures of income inequality in economic studies, with various extensions and applications in finance and other related areas. This paper studies confidence intervals on the Gini coefficient for simple random samples, using normal approximation, bootstrap percentile, bootstrap-t and the empirical likelihood method. Through both theory ...

Journal: :International journal of epidemiology 1997
J Katz S S Yoon K Brendel K P West

BACKGROUND The purpose of this study was to estimate the bias and design effects associated with the Expanded Program on Immunization's (EPI) sampling design when estimating xerophthalmia prevalence, and to estimate the savings associated with EPI in terms of distance travelled within selected clusters. METHODS Computer simulation of the EPI sampling strategy was done using maps from a xeroph...

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