sample tree中文什么意思

例句与用法

1. Method of sample tree collection for physical and mechanical tests of wood
   木材物理力学试材采集方法
2. This article uses fixation swatch founding for second - class investigation to obtain character of 207 sample trees , by which mathematics model of ground diameter volume table of chinese fir were deduced by regressing and imitating with five of equations respectively , and used unitary and binary volume tables of timber respectively to reckon an unitary ground diameter volume table , then compared the two ground diameter volume tables , so that a ground diameter volume table of chinese fir in yanping district was compilated to satisfy essentially the precision demand of forestry production , and to serve forestry production
   摘要利用二类调查布设的固定样地，收集207株样木调查资料，分别采用5个方程进行回归拟合，选出杉木人工林地径材积表的方程模型，利用一元材积表和二元材积表导算编制一元地径材积表，并进行比较，结果表明二元材积表导算地径材积表的方法精度较高，基本满足林业生产所需精度要求，可以提供林业生产服务。