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The T2 chart with mixed samples to control bivariate autocorrelated processes
(2016-06-02)
In this paper, we propose the use of the T2 chart with the mixed sampling strategy (MS) to monitor the mean vector of bivariate processes with observations that fit to a first-order vector autoregressive model. With the ...
A new sampling strategy to reduce the effect of autocorrelation on a control chart
(2014-01-01)
On-line monitoring of quality characteristics is essential to limit scrap and rework costs due to bad quality in a manufacturing process. In several manufacturing environments, during production process data can be massively ...
A new sampling strategy for the Shewhart control chart monitoring a process with wandering mean
(Taylor &francis Ltd, 2015-07-18)
In many processes, such as in chemical and process industries, the observations of a quality characteristic to be monitored may be correlated, if sampling intervals are short. Correlation can be modelled by considering the ...
Economic design of Shewhart control charts for monitoring autocorrelated data with skip sampling strategies
(Elsevier B.V., 2014-05-01)
On-line monitoring of process variability is strategic to achieve high standards of quality and maintain at acceptable levels the number of nonconforming items. Shewhart control charts are the simplest Statistical Process ...
ALTERNATIVE SAMPLING STRATEGY FOR A RANDOM OPTIMIZATION ALGORITHM
(Plenum Publ Corp, 1993-08-01)
Alternative sampling procedures are compared to the pure random search method. It is shown that the efficiency of the algorithm can be improved with respect to the expected number of steps to reach an epsilon-neighborhood ...
Establishing a soybean germplasm core collection
(ELSEVIER SCIENCE BV, 2010)
Core collections are of strategic importance as they allow the use of a small part of a germplasm collection that is representative of the total collection. The objective of this study was to develop a soybean core collection ...
Storage strategies and processing of bovine milk samples for pregnancy-associated glycoproteins detection test
(Taylor & Francis As, 2017-01-01)
Three experiments were performed to test if the time and storage conditions of milk samples, the preheating of samples in a water bath, as well as the carryover effect in laboratory analysis equipment could affect the ...
Non-parametric tests for small samples of categorized variables: A study
(2016-07-01)
This paper presents a study on non-parametric tests to verify the similarity between two small samples of variables classified into multiple categories. The study shows that the only tests available for this situation are ...
The skipping strategy to reduce the effect of the autocorrelation on the T (2) chart's performance
(Springer, 2015-10-01)
In this article, we consider the T (2) control chart for bivariate samples of size n with observations that are not only cross-correlated but also autocorrelated. The cross-covariance matrix of the sample mean vectors were ...