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Monitoring the covariance matrix with the vmax chart
(2008-12-01)
In this article, 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, shortly VMAX statistic. The points ...
The double sampling and the EWMA charts based on the sample variances
(Elsevier B.V., 2014)
Monitoring the covariance matrix with the VMAX chart
(Int Soc Sci Appl Technol, 2008-01-01)
In this article, we propose a new statistic to control the covariance matrix of bivariate processes. This new statistic is based on the sample vat-lances of the two quality characteristics, shortly VMAX statistic. The ...
A Single Statistic for Monitoring the Covariance Matrix of Bivariate Processes
(TAYLOR & FRANCIS INCPHILADELPHIA, 2012)
In this article, we present a new control chart for monitoring the covariance matrix in a bivariate process. In this method, n observations of the two variables were considered as if they came from a single variable (as a ...
A single statistic for monitoring the covariance matrix of bivariate processes
(Taylor & Francis Inc, 2012-01-01)
In this article, we present a new control chart for monitoring the covariance matrix in a bivariate process. In this method, n observations of the two variables were considered as if they came from a single variable (as a ...
A single statistic for monitoring the covariance matrix of bivariate processes
(Taylor & Francis Inc, 2012-01-01)
In this article, we present a new control chart for monitoring the covariance matrix in a bivariate process. In this method, n observations of the two variables were considered as if they came from a single variable (as a ...
Optimal mean-variance control for discrete-time linear systems with Markovian jumps and multiplicative noises
(PERGAMON-ELSEVIER SCIENCE LTDOXFORD, 2012-02)
In this paper, we consider the stochastic optimal control problem of discrete-time linear systems subject to Markov jumps and multiplicative noises under two criteria. The first one is an unconstrained mean-variance trade-off ...
Genomic regions underlying uniformity of yearling weight in Nellore cattle evaluated under different response variables
(2018-08-16)
Background: In livestock, residual variance has been studied because of the interest to improve uniformity of production. Several studies have provided evidence that residual variance is partially under genetic control; ...
Monitoring the covariance matrix with the VMAX chart
(Int Soc Sci Appl Technol, 2014)
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 ...