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Type of publication: Straipsnis Clarivate Analytics Web of Science ar/ir Scopus / Article in Clarivate Analytics Web of Science or / and Scopus (S1)
Field of Science: Matematika / Mathematics (N001)
Author(s): Rupšys, Petras;Petrauskas, Edmundas
Title: Development of q-exponential models for tree height, volume and stem profile
Is part of: International Journal of the Physical Sciences Nairobi, Vol. 5 (15) (2010)
Extent: p. 2369-2378
Date: 2010
Keywords: Stem taper model;Q-exponential function;Tree allometry;Scots pine
Abstract: New models for tree height stem volume and taper (stem profile) were developed using a q-exponential function in the symbolic computational language MAPLE. Three previously constructed models and a new q-exponential model for height stem volume and taper were employed to compare predicted values with empirical values of height, stem volume and diameter outside bark. Performance statistics for the height stem volume and taper equations included four statistical indices: mean bias, mean absolute bias, mean percentage of absolute bias, and a coefficient of determination. A stem analysis of 1925 Scots pine (Pinus sylvestris) trees provided the data for this study. The new q-exponential models were superior to the previously constructed models in predicting height, stem volume and taper
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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