نتایج جستجو برای: hybrid hazard rate function

تعداد نتایج: 2268838  

2007
Lutz Dümbgen

We study nonparametric maximum likelihood estimation of a log–concave probability density and its distribution and hazard function. Some general properties of these estimators are derived from two characterizations. It is shown that the rate of convergence with respect to supremum norm on a compact interval for the density and hazard rate estimator is at least (log(n)/n) and typically (log(n)/n...

2009
Gaurav Shukla Vinod Kumar

Abstract Bayes estimators of the scale parameter of a generalized gamma type model are obtained for different priors. For the proposed prior, Bayes estimator of θ for given p and k=1 coincides with MLE of θ if c=2, whereas Bayes estimator of hazard rate function of θ given p and k coincides with its MLE. Thumb’s rule has been used for constructing a conjugate prior for θ . Bayes estimators of r...

2000
James A. Gi ord Irene Gijbels Peter Hall Li-Shan Huang

We show how to smoothly`monotonise' standard kernel estimators of hazard rate, using bootstrap weights. Our method takes a variety of forms, depending on choice of kernel estimator and on the distance function used to deene a certain constrained optimisation problem. We connne attention to a particularly simple kernel approach, and explore a range of distance functions. It is straightforward to...

Yazdani Cherati, جمشید, اعتمادی نژاد , سیاوش, شعبانخانی, بیژن , معصومی, صفورا , یوسف نژاد, کیوان ,

Abstract Background and purpose: Coronary artery disease is one of the major causes of death worldwide and analysis of survival data is important in these patients. The Cox model not only calculates the hazard function but also introduces other significant variables. Materials and methods: 128 patients referred to Mazandaran Heart Center from 2005 to 2007 and treated by angioplasty were fol...

Journal: :American Journal of Civil Engineering 2020

2002
Y. BEN NAKHI S. L. KALLA

We introduce and establish some properties of a generalized form of the beta function. Corresponding generalized incomplete beta functions are also defined. Moreover, we define a new probability density function (pdf) involving this new generalized beta function. Some basic functions associated with the pdf, such as moment generating function, mean residue function, and hazard rate function are...

2011
M. Kayid

Abstract The concept of reversed hazard rate of a random life is defined as the ratio between the life probability density to its distribution function. This concept plays a role in analyzing censored data and is applicable in such areas as Forensic Sciences. In this investigation, we address the question of testing the reversed hazard rate where the null is that the reversed hazard rate is an ...

Journal: :Rel. Eng. & Sys. Safety 2012
Mark Bebbington Chin-Diew Lai Morgan Wellington Ricardas Zitikis

Although failure data are usually treated as being continuous, they may have been collected in a discrete manner, or in fact be discrete in nature. Reliability models with bathtub-shaped hazard rate are fundamental to the concepts of burn-in and maintenance, but how well do they incorporate discrete data? We explore discrete versions of the additive Weibull distribution, which has the twin virt...

Journal: :The International Journal of Biostatistics 2021

Journal: :Probability in the Engineering and Informational Sciences 2005

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