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An EWMA chart for monitoring the covariance matrix of a multivariate process based on dissimilarity index.
Longcheen Huwang
Po-Chun Lin
Chih-Hsiang Chang
Li-Wei Lin
Yeu-Shiang Tee
Published in:
Qual. Reliab. Eng. Int. (2017)
Keyphrases
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covariance matrix
control charts
covariance matrices
multivariate normal
statistical process control
principal component analysis
multivariate gaussian
weighted moving average
positive definite
correlation matrix
image segmentation
objective function
pairwise
sample size
mahalanobis distance