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Type of publication: research article
Type of publication (PDB): Straipsnis kitose duomenų bazėse / Article in other databases (S4)
Field of Science: Miškotyra / Forestry (A004)
Author(s): Petrauskas, Edmundas;Rupšys, Petras
Title: General q-exponential Model for Tree Height, Volume and Stem Profile
Is part of: Latest rends on systems: 14th WSEAS International Conference on SYSTEMS, Corfu Island, Greece July 22-24, 2010: Part of the 14th WSEAS CSCC Multiconference: Volume II Corfu: Published by WSEAS Press, 2010
Extent: p. 555-560
Date: 2010
Keywords: Stem taper model;Q-exponential function;Height;Volume;Diameter
ISBN: 978-960-474-214-1
Abstract: Two new q-exponential height and q-exponential segmented taper models were developed using qexponential function. Four height models, six stem volume models, and three taper models were compared to the observed values of height, stem volume and diameter outside bark. The performance statistics of the height, volume and taper equations included four fit statistics: mean bias, mean absolute bias, mean percentage of absolute bias and a coefficient of determination. Data used in this study came from stem analysis on 1925 pine trees. Results show that the q-exponential models were superior to the other used models in predicting height, volume and diameter outside bark. The results are implemented in the symbolic computational language MAPLE
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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