1) 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。
2) crown mean diameter
树冠平均直径
3) stem diameter
树干直径
1.
The growth pattern in stem diameter of nine sample trees of Larix principis-rupprechtii was measured by dendrometer and the response of which to the meteorological factors was researched from May to November in 2005 in the north of Liupan Mountain, Ningxia.
结果表明:树干直径的日最大值出现在6:00—9:00,最小值则在16:00—20:00;直径生长的季节变化表现为前期快后期慢,8月下旬以后基本停止生长;林分内优势度大的林木生长较快;树干直径生长过程随时间的变化符合幂函数曲线,方程的确定系数为0。
4) trunk diameter
树干直径
1.
Based on the newly constructed genetic linkage map,the QTLs for trunk diameter in jujube was also analyzed in this study,and a total of 6 QTLs were identified,and they could explain 38.
0软件,首次对控制枣树干直径性状的QTL进行分析。
2.
Activities of SOD,CAT and POD in leaf and changes of ground diameter and trunk diameter of Eucommia ulmoides Oliv.
)叶片的超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和过氧化物酶(POD)活性及树干地径和树干直径的变化进行了分析比较。
5) diameter deviation
直径偏差
1.
In this paper, after discussing the deduction of the assignment of traction under such circumstance, the influences on the the assignment of traction, caused by the windage of the actual diameter deviation between two rollers is known.
就矿井双滚筒共同驱动带式输送机经常出现的滚筒磨损问题,通过对带式输送机双滚筒共同驱动方式下两滚筒牵引力分配的推导,探讨了两驱动滚筒实际直径偏差对牵引力配比的影响,并针对以上影响造成的双滚筒共同驱动带式输送机滚筒磨损问题,提出了解决方案及措施。
补充资料：当量比表面直径、表面积体积平均直径
分子式：
CAS号：
性质：又称当量比表面直径、表面积体积平均直径。是颗粒群表面积分布的平均直径。其意义为与颗粒群的粒形相同，总体积相同、总表面积相同，且粒度均匀的一个假想颗粒群的粒度。亦即指与该颗粒群的粒形相同，比表面积相同的一个颗粒的粒度。
CAS号：
性质：又称当量比表面直径、表面积体积平均直径。是颗粒群表面积分布的平均直径。其意义为与颗粒群的粒形相同，总体积相同、总表面积相同，且粒度均匀的一个假想颗粒群的粒度。亦即指与该颗粒群的粒形相同，比表面积相同的一个颗粒的粒度。
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