Properties and prediction accuracy of a sigmoid function of time-determinate growth

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41320%2F15%3A68484" target="_blank" >RIV/60460709:41320/15:68484 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.3832/ifor1243-007" target="_blank" >http://dx.doi.org/10.3832/ifor1243-007</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3832/ifor1243-007" target="_blank" >10.3832/ifor1243-007</a>

Result language
angličtina
Original language name
Properties and prediction accuracy of a sigmoid function of time-determinate growth
Original language description
The properties and short-term prediction accuracy of mathematical model of sigmoid time-determinate growth, denoted as “KM-function”, are presented. Comparative mathematical analysis of the function revealed that it is a model of asymmetrical sigmoid growth, which starts at zero size of an organism and terminates when it reaches its final size. The function assumes a finite length of the growth period and includes a parameter interpretable as the expected lifespan of the organism. Moreover, the possibility for growth curve inflexion at any age is possible, so the function can be used for modelling of S-shaped growth trajectories with various degree of asymmetry. These good theoretical predispositions for realistic growth predictions were empirically evaluated. The KM-function used in three and four-parameter forms was compared with three classical (Richards, Korf and Weibull) growth functions employing two parameterisation methods - nonlinear least squares (NLS) and Bayesian method. The evaluation wa
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
GK - Forestry
OECD FORD branch
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Project
<a href="/en/project/QJ1320230" target="_blank" >QJ1320230: Forestry Decision Support Systems to improve wood producing and non-wood-producing forest functions</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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