Drvna industrija, Vol. 67 No. 2, 2016.
Izvorni znanstveni članak
https://doi.org/10.5552/drind.2016.1528
Wavelet Analysis of X-ray Density Function of Tree Ring Structure
Levente Csoka
orcid.org/0000-0002-9687-7709
; Sveučilište zapadne Mađarske, Odjel za proizvode od drva i drvnu tehnologiju, Sopron, Mađarska
Sažetak
The annual ring density of cross-sections of Japanese cedar stems of different ages has been recorded by X-ray density analyser in order to determine the boundary line between juvenile and mature wood. A particular emphasis was put on the tracheid length in the annual rings. The obtained data was analysed by using Wavelet transformation. It can be assumed that the process of formation of woody tissue is a periodic one and that the characteristic periods include several annual rings. This also indicates that the growth of a tree can be separated into distinct processes that can be identified within the juvenile and mature wood zones. It has been shown that the suggested numerical approach enables a rapid and reliable evaluation of the data.
Ključne riječi
Juvenile/mature wood; Hurst exponent; tracheid length; X-ray densitometry; wavelet transform
Hrčak ID:
160174
URI
Datum izdavanja:
29.6.2016.
Posjeta: 1.654 *