Results 151 to 160 of about 17,058 (192)

Anti-xa guided enoxaparin thromboprophylaxis is associated with less thromboembolism than fixed dose dalteparin in trauma patients admitted to intensive care. [PDF]

open access: yesEur J Trauma Emerg Surg
Kloub A   +11 more
europepmc   +1 more source

Non-parametric Shewhart control charts

Journal of Nonparametric Statistics, 2005
Consider a training sample of independent random variables having an unknown strongly unimodal distribution.
Ion, R.A., Klaassen, C.A.J.
openaire   +3 more sources

Shewhart Control Charts in New Perspective

Sequential Analysis, 2007
The effects of estimating parameters and the violation of the assumption of normality when dealing with control charts are discussed. Corrections for estimating errors and extensions of the normal control chart to parametric and nonparametric charts are investigated.
Albers, Willem, Kallenberg, Wilbert C.M.
openaire   +1 more source

Estimation in Shewhart control charts: effects and corrections

Metrika, 2004
The influence of the estimation of parameters in Shewhart control charts is investigated. It is shown by simulation and asymptotics that (very) large sample sizes are needed to accurately determine control charts if estimators are plugged in. Correction terms are developed to get accurate control limits for common sample sizes in the in-control ...
Albers, Willem, Kallenberg, Wilbert C.M.
openaire   +2 more sources

Generalization of Shewhart X~-chart

Annual Reliability and Maintainability Symposium, 2002
In univariate quality control, the X~-Charts have been useful in determining whether the process mean is in control or not. It would be very useful to have a similar chart applied to the multivariate case. The existing methods do not provide all the information that a quality control practitioner would like to possess such as the indication of which ...
A.A. Houshmand, S. Golnabi, M. Frosh
openaire   +1 more source

Combined CUSUM–Shewhart Schemes for Binomial Data

Economic Quality Control, 2006
Summary: The detection of upward shifts in a process parameter using a CUSUM scheme can be improved by using an upper one-sided combined CUSUM-Shewhart scheme. Considerable advantage is to be gained since combined schemes take advantage of two well known facts: the Shewhart schemes behave well in case of a large shift, while CUSUM schemes allow a fast ...
Morais, Manuel Cabral, Pacheco, António
openaire   +2 more sources

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