1) crown mean diameter

树冠平均直径
2) average diameter

平均直径
1.
A survey on the average diameter of double-loop networks with non-unit step

非单位步长双环网络平均直径的研究
2.
The definitions of grain size,area,average area,chord,long axes,short axes,diameter and average diameter are given in this article.
对钢金相图像中晶粒的晶粒度、面积、平均面积、弦、长轴、短轴、直径和平均直径进行了定义,提出用填充剔除计数法进行晶粒颗数的统计,给出了一个晶粒平均面积和平均直径的估算公式。
3) Mean Diameter

平均直径
1.
The models for mean diameter,stand height and stand volume of natural forests are established by using the ground sample plots of Continuous Forest Inventory in Tibet.
利用西藏自治区森林资源连续清查的天然林实测样地资料,研究建立了冷杉、云杉、柏木、松类、栎类、桦类、阔叶类、针阔类8个树种组的平均直径、平均树高和平均蓄积估测模型,为预估西藏天然林的有关林分因子提供参考依据。
4) crown diameter variance

树冠直径方差
1.
Supposing that the trees are stationed at grid points with same size of the crown, from the very beginning of the trees competition, the mechanism of the occurrence of crown diameter variance is theoretically studied through the simulation .
该文在若干假定的前提下,在林木开始竞争时,通过模拟间伐,从理论上探讨树冠直径方差发生机制。
5) mean crown-length

平均树冠长<林>
6) mean crown height

平均树冠高<林>
补充资料:树冠
1.乔木树干以上连同集生枝叶的部分,其状如冠,故称。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条