摘要
本文提出了一种立木材积测估方法:回归确定相对干曲线后计算相对材积,由此测估立木材积。文中以平原地区路旁箭杆杨为样本,根据多项式回归原理,得到6个y=φ(x),分别计算θ,利用H和d_(0.1H)的测量值估计V。经检验,曲线回归效果显著,立木材积测估值质量可靠。
In this paper a method for measuring standing wood volume was put forward :af-ter getting the relative stem curve by means of regression ,calculating relative volume of wood ; through this calculation, measuring the volume of standing wood. Using arrow shaft poplars a-long roads in plain areas as specimens,six of y = φ(X) were gained and 0 could be respectively cal-culated according to the principle of multinominal regression, while V could be estimated by the measuring value of H and d0.1H. The result showed that the effect of curve regression was signifi-cant and the value of measuring standing wood volume was reliable.
出处
《农业科学研究》
1992年第1期67-70,共4页
Journal of Agricultural Sciences
关键词
立木材积
相对干曲线
多项式回归
volume of standing wood
relative stem curve
multinominal regression
