摘要
本文据根天山云杉林分树干解析资料,应用灰色系统理论建模方法,依树高和胸径的定期生长量随时间的增长而变化的数据序列,建立了测定树高的GM(1,2)灰色动态模型,求得模型计算值,进而以模型计算值作为蓄积量测定的要素之一,参予了林分蓄积量计算,并与实测值分别进行了对照检验,结果表明:所建模型拟合效果较好,其树高和蓄积量计算值,具有较高的精度。
In this paper, using the data of stem analysis of schren spruce and according to the time series of periodic diameter and height increment, GM (1, 2) grey systematic dynamic model of height growth was fitted. The method of making model in grey system theory was applied. Afterwords, as an important factor, the theoretical value of tree height was used to calculate stand volume and was tested with the practical value The result shows that the high precision of theoretical value of height and volume was obtained.
关键词
云杉
林分测定
树高
动态模型
schren spruce stand
stem analysis
periodic increment GM (1, 2) grey systematic model
