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pro vyhledávání: '"W. J. Padgett"'
Autor:
Chanseok Park, W. J. Padgett
Publikováno v:
Quality Technology & Quantitative Management. 4:17-34
In this paper, we present a method for incorporating several accelerating variables into accelerated test models for failure of materials. We propose a hyper-cuboidal volume approach as an overall accelerating measure, which enables one to extend exi
Autor:
Chanseok Park, W. J. Padgett
Publikováno v:
Journal of Statistical Planning and Inference. 136:3783-3801
A generalized cumulative damage approach is presented which yields a large family of accelerated test inverse Gaussian-type models for strength of materials that incorporate the size effect as the acceleration variable. Previous models are generalize
Autor:
W. J. Padgett, Chanseok Park
Publikováno v:
Journal of Statistical Computation and Simulation. 76:619-636
Analysis of various multi-modal strength distributions are studied by using competing risks models. This multi-modality may arise due to several kinds of flaws in a material. The fracture of a material is controlled by the most severe of all the flaw
Autor:
Chanseok Park, W. J. Padgett
Publikováno v:
IEEE Transactions on Reliability. 55:379-390
Many products & systems age, wear, or degrade over time before they fail or break down. Thus, in many engineering reliability experiments, measures of degradation or wear toward failure can often be observed over a period of time before failure occur
Autor:
R. L. Taylor, W. J. Padgett
Publikováno v:
Journal of Statistical Computation and Simulation. 76:373-383
In this paper, a brief account of the origin and evolution of the Southern Regional Council on Statistics/American Statistical Association (SRCOS/ASA) Summer Research Conference (SRC) is outlined. The 40th SRC was held in Blacksburg, Virginia, on 6
Autor:
K. B. Kulasekera, W. J. Padgett
Publikováno v:
Journal of Nonparametric Statistics. 18:129-143
Problems with censored data arise frequently in survival analyses and reliability applications. The estimation of the density function of the failure times is often of interest. Two inherent problems in density estimation for lifetime data are the sp
Autor:
W. J. Padgett, Michele Nichols
Publikováno v:
Quality and Reliability Engineering International. 22:141-151
The problem of detecting a shift of a percentile of a Weibull population in a process monitoring situation is considered. The parametric bootstrap method is used to establish lower and upper control limits for monitoring percentiles when process meas
Autor:
W. J. Padgett, J.G. Surles
Publikováno v:
Journal of Statistical Planning and Inference. 128:271-280
Properties of a scaled Burr type X distribution are given. Closed-form expressions for the moments only exist for certain special cases, so upper and lower bounds for the first moment are given, as well as an approximation based on these bounds. Maxi
Autor:
W. J. Padgett, Arzu Onar
Publikováno v:
Journal of Statistical Planning and Inference. 119:411-420
The problem of choosing optimal levels of the acceleration variable for accelerated testing is an important issue in reliability analysis. Most recommendations have focused on minimizing the variance of an estimator of a particular characteristic, su
Autor:
Meredith A. Tomlinson, W. J. Padgett
Publikováno v:
Journal of Statistical Computation and Simulation. 73:429-443
Approximate lower confidence bounds on percentiles of the Weibull and the Birnbaum-Saunders distributions are investigated. Asymptotic lower confidence bounds based on Bonferroni's inequality and the Fisher information are discussed, and parametric b