The paper compares and analyses growth ring width and basic density of Pinus tabulaeformis which grow in Badu forest farm of Longxian county in Shaanxi Province .
比较分析了陕西省陇县八渡林场油松 ( Pinus tabulaeformis)木材的生长轮宽度、基本密度。
A new method of measuring wood growth ring density and growth width was produced with X-ray combind image processing in this paper.
提出X射线图像法测定木材生长轮密度和生长轮宽度的一种新方法,应用自编的软件,对图像进行预处理,获取其灰度值,根据图像的灰度值与穿透物材料密度的线性关系直接测定物体微密度,并与微密度测量仪测定结果进行对比。
A long-term forecast method of timber growth ring density based on process neural network was proposed in this paper.
提出一种基于过程神经网络的木材生长轮密度长期预测方法。
The wood density and the fiber length varied with the cambium age and ring width were firstly quantitatively modeled in three different sites or any sites.
本文以福建省顺昌县三种立地条件下的 2 4年生杉木人工林木材为对象 ,首次分别建立了三种立地条件下以及不考虑立地条件下杉木人工林木材密度与纤维长度随生长因子中的生长轮年龄和年轮宽度的一系列回归模型 ,并进行回归显著性检验 ,为杉木人工林木材材质的早期预测和定向培育提供科学的理论依据。