Results 31 to 40 of about 10,169,362 (317)

A Family of Ratio Estimators in Stratified Random Sampling Utilizing Auxiliary Attribute Along Side the Nonresponse Issue

open access: yesJournal of Statistical Theory and Applications (JSTA), 2019
This article proposes some estimators based on an adaptation of the estimators developed by Bahl and Tuteja [1], Diana [2], Koyuncu and Kadilar [3], Koyuncu and Kadilar [4], Shabbir and Gupta [5], and Koyuncu [6] utilizing available supplementry ...
Usman Shahzad   +3 more
doaj   +1 more source

Sampling plan and methodological aspects: a household healthcare survey in Piauí

open access: yesRevista de Saúde Pública, 2021
OBJECTIVE To describe the methodological aspects of the Piauí home healthcare survey (ISAD-PI) and assess the relation between sampling plan, precision, and design effects, assuming that population health surveys are relevant instruments for health ...
Lays Arnaud Rosal Lopes Rodrigues   +13 more
doaj   +2 more sources

The Total Operating Characteristic from Stratified Random Sampling with an Application to Flood Mapping

open access: yesRemote Sensing, 2021
The Total Operating Characteristic (TOC) measures how the ranks of an index variable distinguish between presence and absence in a binary reference variable.
Zhen Liu, R. Pontius
semanticscholar   +1 more source

SAMPLING METHODS AND NUMBER OF ROUNDWOODS FOR DETERMINING THE MOISTURE CONTENT

open access: yesRevista Árvore, 2018
This study had the objective of comparing two methodologies of sampling, Simple Random Sampling (ACS) and Stratified Random Sampling (ACE) to determine the optimum number of roundwood samples to obtain the moisture content of the population.
Danilo Barros Donato   +5 more
doaj   +1 more source

An Inverse-Occurrence Sampling Approach for Urban Flood Susceptibility Mapping

open access: yesRemote Sensing, 2023
Data-driven flood susceptibility modeling is an efficient way to map the spatial distribution of flood likelihood. The quality of the flood susceptibility model relies on the learning technique and the data used for learning.
Changpeng Wang   +5 more
doaj   +1 more source

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

Efficient Stratified Sampling Graphing Method for Mass Data

open access: yesData Science Journal, 2019
Sequentially linking data during polyline graphing of mass data (millions of points or more) generally results in poor graphing efficiency. Numerous curves are buried behind each pixel and cannot be displayed due to resolution limits of the width of the ...
Jianjun Wang   +5 more
doaj   +1 more source

Sampling of cashew nuts as an aid to research for the genetic improvement of cashew tree [PDF]

open access: yesPesquisa Agropecuária Brasileira, 2019
: The objective of this work was to estimate sample sizes of cashew (Anacardium occidentale) nuts as an aid to the genetic improvement of cashew tree. Nuts were separated by size: nuts < 17 mm were classified as size 1 (S1); 17 mm ≤ nuts < 19 mm, size 2 (
Adroaldo Guimarães Rossetti   +2 more
doaj   +1 more source

Depth-stratified soil sampling for assessing nematode communities

open access: yesSemina: Ciências Agrárias, 2016
This study assessed the importance of stratified soil sampling on the detection (and therefore the distribution) of nematode communities and the differentiation of ecosystems by collecting stratified soil samples at intervals of 10 cm and non-stratified ...
Giovani de Oliveira Arieira   +3 more
doaj   +1 more source

A Link Quality Estimation Method for Wireless Sensor Networks Based on Deep Forest

open access: yesIEEE Access, 2021
In wireless sensor networks, sensor nodes, the miniature embedded devices, have limitation of energy, storage, computing, and etc. One of the tasks of the nodes is to use their limited resources to complete work efficiently.
Mu He, Jian Shu
doaj   +1 more source

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