Results 21 to 30 of about 389,587 (260)

Mass transfer rate and osmotic treatment efficiency of peaches

open access: yesActa Universitatis Sapientiae: Alimentaria, 2022
The highest-quality peaches [Prunus persica (L.) Batsch] are cultivated in areas with sunny summers, therefore the territory of the Autonomous Province of Vojvodina is a favourable region for their production.
Lončar B.   +6 more
doaj   +1 more source

Tangent Phylogenetic PCA

open access: yes, 2023
Phylogenetic PCA (p-PCA) is a version of PCA for observations that are leaf nodes of a phylogenetic tree. P-PCA accounts for the fact that such observations are not independent, due to shared evolutionary history. The method works on Euclidean data, but in evolutionary biology there is a need for applying it to data on manifolds, particularly shapes ...
Morten Akhøj   +2 more
openaire   +4 more sources

RKF-PCA: Robust kernel fuzzy PCA

open access: yesNeural Networks, 2009
Principal component analysis (PCA) is a mathematical method that reduces the dimensionality of the data while retaining most of the variation in the data. Although PCA has been applied in many areas successfully, it suffers from sensitivity to noise and is limited to linear principal components.
Computer and Information Science and Engineering, University of Florida, United States ( host institution )   +3 more
openaire   +4 more sources

Spatial and Temporal Assessment of Water Quality Changes in North, Northwest and Southwest Rivers of Iran, Involving Multivariate Statistical Techniques and GIS [PDF]

open access: yesWater Harvesting Research, 2022
Surface water, especially rivers, is one of the most important water resources that play an important role in supplying water for various activities.
Parva Mohammadi   +3 more
doaj   +1 more source

Potential Partnerships: Progressive Criminology, Grassroots Organizations and Social Justice

open access: yesInternational Journal for Crime, Justice and Social Democracy, 2015
Criminologists around the globe are writing about the disproportionate criminalization of minority groups and – in the US in particular – about racial disproportionality in all aspects of the criminal justice system.
Tim Goddard   +2 more
doaj   +1 more source

A chemometric approach to the headspace sampled volatiles of selected Salvia species from Southeastern Serbia [PDF]

open access: yesBotanica Serbica, 2022
Headspace sampling is a fast, simple and economical way to prepare plant samples for analysis by gas chromatography. For the first time, the composition of the head space volatiles (HSV) of six Salvia species (S. verticillata, S. glutinosa, S.
Emilija Kostić   +5 more
doaj   +1 more source

PCA in autocorrelation space [PDF]

open access: yesObject recognition supported by user interaction for service robots, 2003
The use of higher order autocorrelations as features for pattern classification has been usually restricted to second or third orders due to high computational costs. Since the autocorrelation space is a high dimensional space we are interested in reducing the dimensionality of feature vectors for the benefit of the pattern classification task.
Popovici, V., Thiran, J.
openaire   +1 more source

PCA Meets RG [PDF]

open access: yesJournal of Statistical Physics, 2017
A system with many degrees of freedom can be characterized by a covariance matrix; principal components analysis (PCA) focuses on the eigenvalues of this matrix, hoping to find a lower dimensional description. But when the spectrum is nearly continuous, any distinction between components that we keep and those that we ignore becomes arbitrary; it then ...
Bradde, Serena, Bialek, William
openaire   +3 more sources

Comparison of temporal and spatial patterns of water quality parameters in Anzali Wetland (southwest of the Caspian Sea) using Support vector machine model [PDF]

open access: yesCaspian Journal of Environmental Sciences, 2021
Urgent is growing to have reliable information from the country's water resources. In recent years, data mining models such as artificial neural network (ANN), gene expression programming, Bayesian network, machine algorithms, such as a support vector ...
Maryam Fallah   +3 more
doaj   +1 more source

Validation of Nonlinear PCA [PDF]

open access: yesNeural Processing Letters, 2012
Linear principal component analysis (PCA) can be extended to a nonlinear PCA by using artificial neural networks. But the benefit of curved components requires a careful control of the model complexity. Moreover, standard techniques for model selection, including cross-validation and more generally the use of an independent test set, fail when applied ...
openaire   +4 more sources

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