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2013 | OriginalPaper | Buchkapitel

The Further Development of Stem Taper and Volume Models Defined by Stochastic Differential Equations

verfasst von : Petras Rupšys

Erschienen in: IAENG Transactions on Engineering Technologies

Verlag: Springer Netherlands

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Abstract

Stem taper process measured repeatedly among a series of individual trees is standardly analyzed by fixed and mixed regression models. This stem taper process can be adequately modeled by parametric stochastic differential equations (SDEs). We focus on the segmented stem taper model defined by the Gompertz, geometric Brownian motion and Ornstein-Uhlenbeck stochastic processes. This class of models enables the representation of randomness in the taper dynamics. The parameter estimators are evaluated by maximum likelihood procedure. The SDEs stem taper models were fitted to a data set of Scots pine trees collected across the entire Lithuanian territory. Comparison of the predicted stem taper and stem volume with those obtained using regression based models showed a predictive power to the SDEs models.

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Metadaten
Titel
The Further Development of Stem Taper and Volume Models Defined by Stochastic Differential Equations
verfasst von
Petras Rupšys
Copyright-Jahr
2013
Verlag
Springer Netherlands
DOI
https://doi.org/10.1007/978-94-007-6190-2_10

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