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Simultaneous Univariate X-bar Charts to Control Bivariate Processes with Autocorrelated Data
(2015-12-01)
In this article, we consider the simultaneous univariate X-bar charts (SU X-bar charts) for samples of n bivariate observation vectors that are not only cross-correlated but also autocorrelated. The cross-covariance matrix ...
THE PRESENCE OF AUTOCORRELATION ON THE T-2 CONTROL CHART OF HAROLD HOTELLING
(Univ Federal Fluminense, Escola Engenharia, Dept Engenharia Producao, 2017-09-01)
The presence of autocorrelation violates the hypothesis of data independence used in statistical control charts in the manufacturing environment. This article examines graphically, using the Mahalanobis distance, the effect ...
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 ...
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 ...
Analysis of the correlation structure of square time series
(WILEY, 2004)
This paper analyses the asymptotic behaviour of the autocorrelation structure exhibited by squares of time series with a Wold expansion where the input error is a sequence of random variables with mean zero and finite ...
A Simple Test of Spatial Autocorrelation for Centered Variables
(Pontificia Universidad Católica del Perú, 2021)
The local spatial autocorrelation and the kernel method for identifying black zones - A comparative approach
(PERGAMON-ELSEVIER SCIENCE LTD, 2003)
This article aims to determine the location and the length of road sections characterized by a concentration of accidents (black zones). Two methods are compared: one based on a local decomposition of a global autocorrelation ...
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 ...
Notes on the complex autocorrelation function
(1976-09)
In the analysis of narrowband signals, for instance radio signals, one normally uses a complex correlation function. A question is usually asked on the relationship of this complex function and the real functions of the ...
A Simple Test of Spatial Autocorrelation for Centered Variables
(Pontificia Universidad Católica del Perú. Fondo EditorialPE, 2021)