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1)  Diameter distribution structure
直径分布结构
1.
This paper analyzes a discrete model based on continuous transferring equation of diameter distribution structure of forest trees, discusses parametric properties and the identification method.
在林木直径分布结构转移连续性方程的基础上,进行离散化分析,讨论了林木直径转移参数的性质和辨识方法,该方法对林木生长状态进行预测、预报及林业资源的最优生长控制具有重大意义。
2)  stand diameter structure
林分直径结构
3)  vertical distribution structure
垂直分布结构
4)  Diameter structure
直径结构
1.
Growth process and diameter structure of Pinus tabulaeformis forest for soil and water conservation in Loess Plateau hilly regions;
黄土丘陵区油松水土保持林生长过程与直径结构
2.
Research on the diameter structure of Japanese larch with distribution of Weibull was made.
利用W e ibu ll分布对日本落叶松直径结构进行研究。
5)  diameter distribution
直径分布
1.
The nonparametric kernel density theory and methods are introduced to model the diameter distribution of broadleaved Pinus koraiensis in Liaoning eastern mountains in contrast with the normal distribution and Weibull distribution.
结果表明,核密度估计方法在模拟直径分布方面明显优于后者。
2.
stand for water resource conservation,the growth process and diameter distribution characteristic of Larix Principis-rupprechtii Plantation in 10 years old were studied using stem analysis method of sample tree,which had two density structures(one was 2 600 per hm2,the other was 3 500 per hm2) in water conservation forest region of Wutai Mountain in Shanxi Province.
hm-2)的人工林生长过程和直径分布进行研究。
6)  diameter and distribution
直径和分布
补充资料:当量比表面直径、表面积体积平均直径
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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。 

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