نتایج جستجو برای: hybrid hazard rate function

تعداد نتایج: 2268838  

ژورنال: پژوهش های ریاضی 2016
Shadrokh , A, Yaghoubzadeh Shahrestani , Sh, Yarmohammadi, M,

In this Paper, We propose a new three-parameter lifetime of Power Series distributions of the Family Gampertz with decreasing, increasing, increasing-decreasing and unimodal Shape failure rate. The distribution is a Compound version of of the Gampertz and Zero-truncated Possion distributions, called the Gampertz-Possion distribution (GPD). The density function, the hazard rate function, a gener...

Journal: :Pakistan Journal of Statistics and Operation Research 2023

In this paper, we study a smooth estimator of the conditional hazard rate function in censorship model when data exhibit some dependence structure. We show, under regularity conditions, that kernel suitably normalized is asymptotically normally distributed.

2015
Haci Mustafa Akcin HACI MUSTAFA AKCIN

Incompleteness is a major feature of time-to-event data. As one type of incompleteness, truncation refers to the unobservability of the time-to-event variable because it is smaller (or greater) than the truncation variable. A truncated sample always involves left and right truncation. Left truncation has been studied extensively while right truncation has not received the same level of attentio...

Journal: :journal of biostatistics and epidemiology 0
maryam nazemipour department of epidemiology and biostatistics, school of public health, international campus, tehran university of medical sciences, tehran, iran abdol-mohammad kajbafzadeh pediatric urology research center, department of pediatric urology, children’s hospital medical center, tehran university of medical sciences, tehran, iran kazem mohammad department of epidemiology and biostatistics, school of public health, tehran university of medical sciences, tehran, iran abbas rahimi foroushani department of epidemiology and biostatistics, school of public health, tehran university of medical sciences, tehran, iran maryam seyedtabib department of epidemiology and biostatistics, school of public health, hamadan university of medical sciences, hamadan, iran ali nazemipour department of computer engineering, sharif university of technology, tehran, iran

background & aim: we aimed to describe a standard survival analysis, so that we can analyze some factors related to the time of occurrence of different types of reflux (unilateral-left, unilateralright, and bilateral) in children with antenatal hydronephrosis (anh) and to provide an approach taking competing risks into account. methods & materials: we used data of 193 children that was collecte...

2013
Saralees Nadarajah

February 15, 2013 Type Package Title Functions for actuarial scientists Version 3.0 Date 2012-09-13 Author Saralees Nadarajah Maintainer Saralees Nadarajah Depends R (>= 2.15.0), reliaR, actuar, hypergeo Description Computes the probability density function, hazard rate function, integrated hazard rate function and the quantile function for 44 commonly used...

2012
William J. Reed

A simple adjustment to parametric failure-time distributions, which allows for much greater flexibility in the shape of the hazard-rate function, is considered. Analytical expressions for the distributions of the power-law adjusted Weibull, gamma, log-gamma, generalized gamma, lognormal and Pareto distributions are given. Most of these allow for bathtub shaped and other multi-modal forms of the...

2010
William J. Reed

A simple adjustment to parametric failure-time distributions, which allows for much greater flexibility in the shape of the hazard-rate function, is considered. Closed-form expressions for the distributions of the power-law adjusted Weibull, gamma, log-gamma, generalized gamma, lognormal and Pareto distributions are given. Most of these allow for bathtub shaped and other multi-modal forms of th...

    Inundation in urban areas due to dens storm has created many problems for all cities thorough the world. Urban flood hazard zoning may provide useful information for dealing with contingency and alleviating risk and loss of life and property. Therefore, to management of urban area, flood relief measures and prioritized to address flooding problems should be identified areas that are more aff...

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