Results 1 to 10 of about 2,518,393 (263)

Representative Samples, Random Sampling

open access: yesCambio, 2022
della redazione: In the social sciences literature the expressions  ‘random sample’ and ‘representative sample’ are often used improperly and sometimes even interchangeably by students who seem to think that sample is representative in so far, and ...
Alberto Marradi
doaj   +2 more sources

Random fields and random sampling [PDF]

open access: yesKybernetika, 2020
The authors study the limit in distribution of the maximum of a stationary bivariate real random field, sampled at double random times under some dependence conditions. It is shown that the limit distribution is a max-semistable distribution when the random samples have a geometric growth pattern. When the random field is sampled at double random times,
Dias, Sandra, Temido, Maria da Graça
openaire   +1 more source

Inclusive random sampling in graphs and networks

open access: yesApplied Network Science, 2023
It is often of interest to sample vertices from a graph with a bias towards higher-degree vertices. One well-known method, which we call random neighbor or RN, involves taking a vertex at random and exchanging it for one of its neighbors.
Yitzchak Novick, Amotz Bar-Noy
doaj   +1 more source

Field sampling methods for investigating forest-floor bryophytes: Microcoenose vs. random sampling [PDF]

open access: yesArchives of Biological Sciences, 2018
Because of the high importance of bryophytes in forest ecosystems, it is necessary to develop standardized field sampling methodologies. The quadrat method is commonly used for bryophyte diversity and distribution pattern surveys.
Ilić Miloš   +3 more
doaj   +1 more source

Detection of Mycobacterium avium Subspecies Paratuberculosis in Pooled Fecal Samples by Fecal Culture and Real-Time PCR in Relation to Bacterial Density

open access: yesAnimals, 2021
Within paratuberculosis control programs Mycobacterium avium subsp. paratuberculosis (MAP)-infected herds have to be detected with minimum effort but with sufficient reliability.
Annika Wichert   +4 more
doaj   +1 more source

Biased Boltzmann samplers and generation of extended linear languages with shuffle [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2012
This paper is devoted to the construction of Boltzmann samplers according to various distributions, and uses stochastic bias on the parameter of a Boltzmann sampler, to produce a sampler with a different distribution for the size of the output.
Alexis Darrasse   +3 more
doaj   +1 more source

Statistical Analysis in the Presence of Spatial Autocorrelation: Selected Sampling Strategy Effects

open access: yesStats, 2022
Fundamental to most classical data collection sampling theory development is the random drawings assumption requiring that each targeted population member has a known sample selection (i.e., inclusion) probability.
Daniel A. Griffith, Richard E. Plant
doaj   +1 more source

Sampling Random Colorings of Sparse Random Graphs [PDF]

open access: yes, 2017
We study the mixing properties of the single-site Markov chain known as the Glauber dynamics for sampling $k$-colorings of a sparse random graph $G(n,d/n)$ for constant $d$.
Efthymiou, Charilaos   +3 more
core   +2 more sources

Quantifying errors without random sampling

open access: yesBMC Medical Research Methodology, 2003
Background All quantifications of mortality, morbidity, and other health measures involve numerous sources of error. The routine quantification of random sampling error makes it easy to forget that other sources of error can and should be quantified ...
LaPole Luwanna M, Phillips Carl V
doaj   +1 more source

Parallel Weighted Random Sampling [PDF]

open access: yes, 2019
Data structures for efficient sampling from a set of weighted items are an important building block of many applications. However, few parallel solutions are known. We close many of these gaps both for shared-memory and distributed-memory machines.
, Sanders, Peter
core   +1 more source

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