1) curve model of relative tree height
相对树高曲线模型
2) relative tree height curve
相对树高曲线
1.
The relative tree height curve models of main seven tree species groups in Guangdong Province, that is Pinus massoniana, Chinese fir, Pinus elliottii, Eucalyptus urophylla, Castanopsis fissa, Soft broadleves, Hard broadleves are established by using 254 sample plots in this paper.
在广东省范围内收集了254块样地资料,建立了广东省马尾松、杉木、湿地松、尾叶桉、藜蒴、软阔类、硬阔类等7个树种(组)的相对树高曲线模型。
2.
In this paper,one method to establish the stand form-height table for estimating the stand volume is presented,based on computing the stand form-height using the sampling data for establishing the relative tree height curve models and data of the CFI.
提出利用建立相对树高曲线模型的样地数据资料和森林资源连续清查的样地数据资料计算林分形高,编制林分形高表估测林分蓄积量的方法,通过林分形高模型自检和实践检验,表明编制现实林分形高表是非常必要的,且编表方法是可行的,认为在森林资源二类调查及连续清查中有推广使用价值。
3.
The relative tree height curve models of 6 tree species groups in Tibet, that is Fir, Spruce, Cypress, Pine, Oak and other broadleaves, are established by using 554 sample plots of CFI in 2001 in Tibet All models have high precision for volume estimation, and can be used in various kinds of forest inventories in Tibe
利用西藏自治区 2 0 0 1年森林资源连续清查的 5 5 4个有林地和疏林样地 ,建立了冷杉、云杉、柏木、松类、栎类、阔叶类等 6个树种组的相对树高曲线模型。
3) tree of stem analysis
树高曲线模型
4) height curve
树高曲线
1.
Six popular height curve equations were adopted to fit with height curve and the results were assessed.
运用Matlab软件,分别采用6个常用的树高曲线方程对树高曲线进行拟合,并对结果作了评价。
2.
As we all know,height curve play an important role in the forest management and forest yield regulation.
树高曲线在森林经营和收获调整中具有重要的作用。
5) relative tree height
相对树高
1.
Simple models and expanded parameter models of relative tree height of Cunninghamia lanceolata even stand were studied.
研究了杉木人工林相对树高曲线基本模型及参数扩展模型，提高了相对树高曲线模型估测精度，初步探讨了树高曲线与林分特征因子间的关系以及“标准树高曲线”设想的局限性。
补充资料：Hesse曲线(代数曲线的)
Hesse曲线(代数曲线的)
Hessian (algebraic curve)
11油限曲线(代数曲线的)【H台自11(.妙如允.抖e);recc咖，T~aaa，即r药pa一吸ee二o‘二p.助蓝] n次代数曲线(司罗玩水c~)的He丈祀曲线就是其极二次曲线能分裂为两条直线的点的集合，也是第一极曲线的二重点构成的集合.n次非奇异曲线的He丈七曲线是一条次数为3伪一2)、类为3(n一2)(3n一7)的曲线.设介O是这条n次曲线的齐次坐标方程，关丘=刁:f/刁xi刁、，则它的He丈犯曲线的定义方程为 !不:关:五，} }五:关:五31=0. }人，人2人3}特征不等于3时的三次非奇异曲线的H既七曲线与这条曲线交于9个通常拐点.因O.H改e(l 844)而得名. A .E.H困阳。B撰
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参考词条