人工林落叶松木材早材宽度径向变异的分形分析  

Fractal Analysis on Radial Variation of Earlywood from Larix gmelinii Plantations

作　　者：赵西平[1] 郭明辉[1] 闫丽[1] 杨海利[1] 

机构地区：[1]东北林业大学,哈尔滨150040

出　　处：《东北林业大学学报》2005年第6期47-48,51,共3页Journal of Northeast Forestry University

基　　金：国家自然科学基金资助项目(30471355)

摘　　要：对人工林落叶松(Larix gmelinii)木材早材宽度的径向变化曲线进行了最优分割,并对其进行分形分析.结果表明:落叶松木材沿径向方向划分为幼龄材(1～10 a)、过渡带(11～23 a)和成熟材(24～33 a)三个区域比较符合实际;从非线性的角度出发,落叶松木材早材宽度曲线的分形维数直观地反映了落叶松早材宽度的径向变化规律,幼龄材、过渡带和成熟材三个区域早材宽度曲线的分形维数分别为1.144 4,1.247 7和1.3222.采用最优分割和分形分析相结合来定量研究木材材质的变异性,是一种比较科学的方法.The radial variation curve for the width of larch earlywood was divided by the optimal segmentation, and fractal analysis was also made. Results showed that it is practical to divide the larch wood into juvenile wood （ 1 ～ 10 years ）, transitional wood （ 11 ～ 23 years） and mature wood （24 ～ 33 years ） along radial direction. As viewed from non - linear theory, the radial variations of earlywood could be described by fractal dimension, and the fractal dimensions of the earlywood curves for juvenile wood, transitional wood and mature wood were 1. 144 4, 1. 247 7 and 1. 322 2, respectively. It is a comparatively scientific method using the optimal segmentation and the fractal analysis to study the variation of wood.

关 键 词：人工林 落叶松 早材宽度 径向变异 最优分割 分形分析 

分 类 号：S781.1[农业科学—木材科学与技术] S791.222[农业科学—林学]