Results 31 to 40 of about 397,778 (284)

Cat swarm optimization for the determination of strata boundaries [PDF]

open access: yesYugoslav Journal of Operations Research, 2023
A stratified random sampling method is preferred for selecting varied populations with outliers. As opposed to plain random sampling, stratified sampling increases statistical precision by reducing estimator variance.
Jasim Raghad M.
doaj   +1 more source

Stratification in Business and Agriculture Surveys with R [PDF]

open access: yesRevista Română de Statistică, 2016
Usually sample surveys on enterprises and farms adopt a one stage stratified sampling design. In practice the sampling frame is divided in non-overlapping strata and simple random sampling is carried out independently in each stratum.
Marco Ballin   +3 more
doaj  

Assessing the Accuracy of Multi-Temporal GlobeLand30 Products in China Using a Spatiotemporal Stratified Sampling Method

open access: yesRemote Sensing, 2023
The new type of multi-temporal global land use data with multiple classes is able to provide information on both the different land covers and their temporal changes; furthermore, it is able to contribute to many applications, such as those involving ...
Yali Gong   +6 more
doaj   +1 more source

Estimation of Fourier Transform Using Alias-free Hybrid-Stratified Sampling [PDF]

open access: yes, 2016
This paper proposes a novel method of estimating the Fourier Transform (FT) of deterministic, continuous-time signals, from a finite number \u1d441 of their samples taken from a fixed-length observation window.
Ahmad, B.I.   +3 more
core   +1 more source

Novel imputation methods under stratified simple random sampling

open access: yesAlexandria Engineering Journal
This paper addresses some classes of combined and separate imputation methods (CSIMs) of the population mean under stratified simple random sampling (SSRS) along with their characteristics.
Anoop Kumar   +5 more
doaj   +1 more source

Estimation for Two Sensitive Variables Using Randomization Response Model Under Stratified Random Sampling

open access: yesMathematics
When direct survey are about sensitive characteristics such as addiction to drugs, alcoholism, proneness to tax invasion and sexual violence, nonresponse bias and response bias become serious problems because people oftentimes do not wish to give true ...
Gi-Sung Lee   +3 more
doaj   +1 more source

Comparison Four Different Probability Sampling Methods based on Differential Evolution Algorithm

open access: yesJournal of Advances in Information Technology, 2012
Differential Evolution (DE) is one kind of evolution algorithm, which based on difference of individuals. DE has exhibited good performance on optimization problem.
Qingbo Lu   +3 more
doaj   +1 more source

A soil sampling program for the Netherlands [PDF]

open access: yes, 2007
Soil data users in The Netherlands were inventoried for current and future data needs. Prioritized data needs were used to design the Netherlands Soil Sampling Program (NSSP) as a framework containing 3 groups of related projects: map upgrading, map ...
DE GRUIJTER, JJ   +2 more
core   +3 more sources

Sampling design may obscure species–area relationships in landscape-scale field studies [PDF]

open access: yes, 2020
We investigated 1) the role of area per se in explaining anuran species richness on reservoir forest islands, after controlling for several confounding factors.
Bueno, Anderson Saldanha   +3 more
core   +1 more source

Anti-aliasing with stratified B-spline filters of arbitrary degree [PDF]

open access: yes, 2006
A simple and elegant method is presented to perform anti-aliasing in raytraced images. The method uses stratified sampling to reduce the occurrence of artefacts in an image and features a B-spline filter to compute the final luminous intensity at each ...
Anderson J.   +5 more
core   +1 more source

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