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The double sampling and the EWMA charts based on the sample variances
(Elsevier B.V., 2008-07-01)
We propose a new statistic to control the covariance matrix of bivariate processes. This new statistic is based on the sample variances of the two quality characteristics, in short VMAX statistic. The points plotted on the ...
The double sampling and the EWMA charts based on the sample variances
(Elsevier B.V., 2008-07-01)
We propose a new statistic to control the covariance matrix of bivariate processes. This new statistic is based on the sample variances of the two quality characteristics, in short VMAX statistic. The points plotted on the ...
Personal que participa en una auditoría
(2017-01-01)
Revisar el perfil que debe caracterizar a un auditor, desde las cualidades profesionales hasta las cualidades éticas mediante estrategias de toma de decisiones y de elaboración de matrices de perfil del auditor.
Review ...
Study of the principal component analysis in air quality databases
(Corporación Universidad de la CostaRetracted, 2021)
Attribute control charts for monitoring the covariance matrix of bivariate processes
(2018-03-01)
In this article, we consider the use of 3 attribute charts—the npxy, the npw and the Max D charts—to control the covariance matrix of bivariate processes. In comparison with the generalized variance |S| chart, the 3 attribute ...
Impacts of agricultural intensification on avian richness at multiple scales in Dry Chaco forests
(Elsevier, 2014-11)
Agricultural expansion and intensification is driving rapid landscape modification in the South American Gran Chaco, affecting biodiversity at multiple spatial scales. Research on biodiversity change in modified landscapes ...
Line based camera calibration in machine vision dynamic applications
(1999-12-01)
The problem of dynamic camera calibration considering moving objects in close range environments using straight lines as references is addressed. A mathematical model for the correspondence of a straight line in the object ...
Source apportionment of PM10 and PM2.5 at Tocopilla, Chile (22A degrees 05' S, 70A degrees 12' W)
(SPRINGER, 2009)
Tocopilla is located on the coast of Northern Chile, within an arid region that extends from 30A degrees S to the border with PerA(o). The major industrial activities are related to the copper mining industry. A measurement ...