Results 31 to 40 of about 9,698 (163)

On Performance of Two-Parameter Gompertz-Based X¯ Control Charts

open access: yesJournal of Probability and Statistics, 2020
In this paper, two methods of control chart were proposed to monitor the process based on the two-parameter Gompertz distribution. The proposed methods are the Gompertz Shewhart approach and Gompertz skewness correction method.
Johnson A. Adewara   +2 more
doaj   +1 more source

Potek fermentacije škroba ob dodatku različnih vrst taninov

open access: yesActa Agriculturae Slovenica, 2007
Proučevali smo vpliv vrste in koncentracije različnih taninskih izvlečkov na kinetiko in vitro fermentacije škroba v vampnem soku. K škrobu smo dodali tri taninske izvlečke: kostanjev tanin (F75), kebračo tanin (QUE) in taninsko kislino (TAK) v različnih
Urška SIVKA, Andrej LAVRENČIČ
doaj   +1 more source

Finding the Growth Rate of a Tumor

open access: yesUndergraduate Journal of Mathematical Modeling: One + Two, 2020
The Gompertz method is used to analyze the growing glioblastoma data and estimate how accurate the results of growth over time are. The Gompertz curve is expressed as V(t) = αe-βe-γt. The data from the tumor is graphed in Excel along with the values from
Christine Staat
doaj   +1 more source

Proof of Conjectures on the Standard Deviation, Skewness and Kurtosis of the Shifted Gompertz Distribution

open access: yesRevstat Statistical Journal, 2021
Three conjectures on the standard deviation, skewness and kurtosis of the shifted Gompertz distribution, as the shape parameter increases to +∞, are proved. In this regard, the exponential integral function and polygamma functions are used in the proofs.
Fernando Jiménez Torres
doaj   +1 more source

Parameter identification for gompertz and logistic dynamic equations.

open access: yesPLoS ONE, 2020
In this paper, we generalize and compare Gompertz and Logistic dynamic equations in order to describe the growth patterns of bacteria and tumor. First of all, we introduce two types of Gompertz equations, where the first type 4-paramater and 3-parameter ...
Elvan Akın   +3 more
doaj   +1 more source

Powers of the Stochastic Gompertz and Lognormal Diffusion Processes, Statistical Inference and Simulation

open access: yesMathematics, 2020
In this paper, we study a new family of Gompertz processes, defined by the power of the homogeneous Gompertz diffusion process, which we term the powers of the stochastic Gompertz diffusion process.
Eva María Ramos-Ábalos   +2 more
doaj   +1 more source

Generalized Gompertz-Power Series Distributions

open access: yesHacettepe Journal of Mathematics and Statistics, 2015
In this paper, we introduce the generalized Gompertz-power series classof distributions which is obtained by compounding generalized Gompertz and power series distributions. This compounding procedure follows same way that was previously carried out by [25] and [3] in introducing the compound class of extended Weibull-power series distribution and the ...
TAHMASEBİ, Saeed, JAFARİ, Ali Akbar
openaire   +2 more sources

The inverted Gompertz-Fréchet distribution with applications

open access: yesScientific African, 2023
The probability distribution is an important aspect of probability theory because of its vast relevance in almost all human disciplines. Its applicability in finance, medicine, agriculture, actuarial science, demography, and econometrics, to mention but ...
Eno E.E. Akarawak   +5 more
doaj   +1 more source

Linear-Gompertz Model-Based Regression of Photovoltaic Power Generation by Satellite Imagery-Based Solar Irradiance

open access: yesEnergies, 2020
A simple yet accurate photovoltaic (PV) performance curve as a function of satellite-based solar irradiation is necessary to develop a PV power forecasting model that can cover all of South Korea, where more than 35,000 PV power plants are currently in ...
Alba Vilanova   +3 more
doaj   +1 more source

Non-linear mixed models in the study of growth of naturalized chickens

open access: yesRevista Brasileira de Zootecnia
This study was conducted to examine the inclusion of random effects in non-linear models, identify the most suitable models, and describe the growth of naturalized chickens. Live-weight records of 166 birds of the Graúna Dourada, Nordestina, and Teresina
Vicente Ibiapina Neto   +3 more
doaj   +1 more source

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