logistic curve


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lo·gis·tic curve

an S-shaped curve that depicts the growth of a population in an area of fixed limits.

logistic curve

an S-shaped curve of numbers against time that represents the growth in numbers of a population of organisms in a limited environment. see GROWTH CURVE.
References in periodicals archive ?
org/wiki/Logistic_function) the logistic curve ) may be a good general descriptor for many aspects of human history.
where [alpha] (asymptote), [beta] (inflection point), and [lambda] (scaling parameter determining curve shape) are the 3 parameters of the logistic curve to be estimated by nonlinear regression.
The growth and death rates of human with aging are in accordance with logistic curve.
The dose-response curve of the calibrator hepcidin-25 was approximated by a 4-parameter logistic curve and showed a dynamic range (SD) of 21 (8) pmol/L to 3.
Applied to nonlinear models, the logistic curve models the sigmoid function, where growth is initially exponential models (increases by a constant percentage depending on time), and after certain time slows down (growth rate decreases) and finally, in maturity, stops.
The logistic curve developed for the relationship followed the actual proportions of individuals that were mature in 13 data bins based on the OL:OW ratio (Fig.
It can be noticed that if the market is stable, the shape of the index usually assumes the form of a logistic curve (Prescott, Hansen 2005; Ambler, Cardia, Zimmermann 2004; Comin, Gertler 2006).
Because the Logistic curve is suitable for the regular pattern of vehicles ownership development, we use least absolute deviation (LAD) to fit it.
One of the most common models is that of logistic curve (13).
Fitting the logistic curve to data is presented through judicious selection of K (2).