Results 111 to 120 of about 37,981 (219)
Modeling the Number of COVID-19 Total Cases in Iran Using Gompertz and Logistic Growth Curves
Journal of Biostatistics and Epidemiology, 2021 Background and Aim: The growth curve are time dependece regression models which commonly are useful in describing the rapid growth of total cases or deaths in a pandemic situation Methods & Materials: The Gompertz and logistic functions are useful ...
Hossein Zamani
doaj
Skyfall: A Survival Analysis of the IMF Executive Board Members
Kyklos, Volume 79, Issue 1, Page 232-250, February 2026.ABSTRACT In the absence of a retirement age constraint at the IMF, this study explores the tenure persistence within the Board of Directors of the International Monetary Fund (IMF) from 2009 to 2021, through a survival analysis. The findings highlight that extrinsic factors, namely sovereign crises, banking crises, the ratio of debt‐to‐GDP, and ...
Elie Israël +3 more
wiley +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
Flow‐Dependent Inertial Permeability Defines Crossover Between Darcy and Forchheimer Flow Regimes
Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract We present mechanistic evidence that the Forchheimer inertial permeability coefficient (β $\beta $) is flow‐dependent in the weak‐to‐intermediate inertia crossover regime, governed by pore‐scale eddy growth‐to‐confinement dynamics. In contrast to classical theory, β $\beta $ attains steady‐state (βs ${\beta }_{s}$) asymptotically in the ...
Kuldeep Singh, Negin Sharifabad
wiley +1 more source
ON THE MOMENTS OF THE 3-PARAMETER GOMPERTZ DISTRIBUTION
BarekengGompertz distribution is a classical probability distribution extensively used in actuarial science, reliability, and survival analysis. Gompertz distribution also plays a role in various fields, such as biology, economics, and marketing analysis.
Moch Taufik Hakiki +3 more
doaj +1 more source
Income's Effect On Car and Vehicle Ownership, Worldwide: 1960-2015 [PDF]
Ownership, growth projection, cars, vehicles, global economy, income ...
Dargay, Joyce, Gately, Dermot
core
Normalized Gompertz wavelets and their applications
International Journal of Wavelets, Multiresolution and Information ProcessingIn this paper we define, using the Stirling numbers of the second kind, the Gompertz wavelets and show their basic properties. In particular, we prove that the admissibility condition holds for them. We also compute the normalizing factors in the space of the square-integrable functions [Formula: see text] and present an explicit formula for them in ...
openaire +2 more sources
Application of Gompertz-Poisson Distribution in LifetimeTheory
پژوهشهای ریاضی, 2017 Gompertz-Poisson distribution is a three-parameter lifetime distribution with increasing, decreasing, increasing-decreasing and unimodal shape failure rate function and a composition of Gompertz and Poisson distributions cut at zero point that in this ...
Shahram Yaghoubzadeh Shahrestani
doaj
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. +2 more
core +1 more source
Neutrosophic Gompertz Distribution: Applications in Analyzing Complex Environmental Datasets
International Journal of Computational Intelligence SystemsMany real-world problems are characterized by uncertainty, indeterminacy, vagueness, and ambiguity. In situations where the random variable has ambiguous values, classical probability distributions may not be effective.
Muhammad Saleem +4 more
doaj +1 more source