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| Titel: |
A new, reliable, and simple-to-use method for the analysis of a population of values of a random variable using the Weibull probability distribution: Application to acrylic bone cement fatigue results |
| Auteur: |
Sied Janna David P. Dwiggins Gladius Lewis |
| Verschenen in: |
Bio-medical materials and engineering |
| Paginering: | Jaargang 15 (2005) nr. 5 pagina's 349-355 |
| Jaar: |
2005-09-19 |
| Inhoud: |
In cases where the Weibull probability distribution is being investigated as a possible fit to experimentally obtained results of a random variable (V), there is, currently, no accurate and reliable but simple-to-use method available for simultaneously (a) establishing if the fit is of the two- or three-parameter variant of the distribution, and/or (b) estimating the minimum value of the variable (V0), in cases where the three-parameter variant is shown to be applicable. In the present work, the details of such a method - which uses a simple nonlinear regression analysis - are presented, together with results of its use when applied to 4 sets of number-of-cycles-to-fracture results from fatigue tests, performed in our laboratory, using specimens fabricated from 3 different acrylic bone cement formulations. The key result of the method is that the two- or three-parameter variant of the probability distribution is applicable if the estimate of V0 obtained is less than or greater than zero, respectively. |
| Uitgever: |
IOS Press |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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