Results 111 to 120 of about 19,767 (209)

The Odd Generalized Exponential Gompertz Distribution

Applied Mathematics, 2015
In this paper we propose a new lifetime model, called the odd generalized exponential gompertz distribution. We obtained some of its mathematical properties. Some structural properties of the new distribution are studied. The method of maximum likelihood is used for estimating the model parameters and the observed Fisher’s information matrix is derived.
M. A. El-Damcese, Abdelfattah Mustafa, B. S. El-Desouky, M. E. Mustafa   +3 more
openaire   +2 more sources

Statistical Ensemble Theory of Gompertz Growth Model

Entropy, 2009
An ensemble formulation for the Gompertz growth function within the framework of statistical mechanics is presented, where the two growth parameters are assumed to be statistically distributed.
Takuya Yamano
doaj   +1 more source

The Age-Specific Force of Natural Selection and Walls of Death

, 2008
W. D. Hamilton's celebrated formula for the age-specific force of natural selection furnishes predictions for senescent mortality due to mutation accumulation, at the price of reliance on a linear approximation.
Evans, Steven N., Steinsaltz, David R., Wachter, Kenneth W.   +2 more
core   +1 more source

The Exponentiated Generalized Extended Gompertz Distribution [PDF]

Journal of Data Science, 2021
Thiago A. N. De Andrade, Subrata Chakraborty, Laba Handique, Frank Gomes-Silva   +3 more
openaire   +1 more source

Kumaraswamy inverse Gompertz distribution: Properties and engineering applications to complete, type-II right censored and upper record data. [PDF]

PLoS One, 2020
El-Morshedy M, El-Faheem AA, El-Dawoody M.   +2 more
europepmc   +1 more source

Linking period and cohort life-expectancy linear increases in Gompertz proportional hazards models [PDF]

In a Gompertz mortality model with constant yearly improvements at all ages, linear increases in period life expectancy correspond to linear increases in the respective cohort life expectancy.
Adam Lenart, Trifon I. Missov
core  

Analysis of stress-strength reliability with m-step strength levels under type I censoring and Gompertz distribution

AIMS Mathematics
Because of modern technology, product reliability has increased, making it more challenging to evaluate products in real-world settings and raising the cost of gathering sufficient data about a product's lifetime.
Neama Salah Youssef Temraz
doaj   +1 more source

Meenakshi’s-Gompertz Distribution and Its Properties

Journal of Probability and Statistical Science
The discussion revolves around the broader concept of exponential family distributions, exploring their applications in survival analysis and reliability engineering. Various distributions within this family, such as the Weibull, Rayleigh, and Gompertz distributions, are examined in terms of their suitability for modelling different phenomena ...
G Meenakshi, Balachandar B
openaire   +1 more source

Gamma-Gompertz life expectancy at birth

Demographic Research, 2013
BACKGROUND The gamma-Gompertz multiplicative frailty model is the most common parametric modelapplied to human mortality data at adult and old ages. The resulting life expectancy hasbeen calculated so far only numerically.
Trifon I. Missov
doaj  

The product life cycle of durable goods [PDF]

The model presented here derives the product life cycle of durable goods. It is based on the idea that the purchase process consists of first purchase and repurchase.
Kaldasch, Joachim
core   +1 more source