logBiomass(treecm)
logBiomass()所属R语言包：treecm
Estimates the wood biomass of logs and truncated branches
估计木质生物质的log截断树枝
译者：生物统计家园网 机器人LoveR
描述----------Description----------
Estimates the wood biomass of logs and truncated branches by computing their volume (using Smalian's formula) and converting it to fresh weight using wood fresh density.
估计木质生物质的log和截断分支机构，通过计算它们的体积（使用Smalian公式），并把它转换为使用木材新鲜密度的鲜重。
Smalian's formula: V=\frac{Sb+Sd}{2}l where V is the log volume, Sb is the aerea of the basal (lower) section, Sd is the area of the higher section and l is the length of the log.
Smalian的公式：V=\frac{Sb+Sd}{2}l其中V是Sb是aerea的基础（下）节，Sd是该区域的高区和<log卷， X>的log的长度。
用法----------Usage----------
logBiomass(x, lowerD, higherD, logLength, density)
参数----------Arguments----------
参数：x
the data frame holding the measures needed to perform the estimation
需要采取的措施进行估计的数据框
参数：lowerD
The name of the data frame column holding diameter of the lower section in cm
保持数据框柱直径的下段（单位cm）的名称
参数：higherD
The name of the data frame column holding the diameter of the higher section (usually smaller!) in cm
保持较高的部分（通常是小！）厘米的直径的数据框的列的名称
参数：logLength
The name of the data frame column holding the length of the log or branch in m
的log或分行米的长度的数据框列名
参数：density
The name of the data frame column holding the fresh density of the wood, defined as D=\frac{V_f}{W_f} where V_f is wood volume measured in the field (i.e. satured with water) in m^3 and W_f is wood fresh weight in kg. Fresh density is measured in \frac{kg}{m^3}
数据框列的名称保持新鲜的木材密度，定义为D=\frac{V_f}{W_f}V_f是木材蓄积量测量领域（即饱和的水）m^3和W_f木材的新鲜体重（公斤）。新鲜的密度测量\frac{kg}{m^3}
注意----------Note----------
Diameters used to compute section areas should be measured under the bark layer! When this is not the case (scarcely ever!) and diameters include bark thickness the log biomass is somewhat over-estimated!
用于计算截面积的直径应测量树皮下的层！时，这是没有的情况下（几乎从未！）和直径包括树皮厚度log生物量是有点高估！
----------References----------
Editore (Bologna), p. 119
参见----------See Also----------
Other Biomass: allometryABDC, allometryAsca2011, allometryCutini2009, allometryPorte2002, powerEquation, pureQuadraticEquation, treeBiomass, treeTotalBiomass
其它生物质allometryABDC，allometryAsca2011，allometryCutini2009，allometryPorte2002，powerEquation，pureQuadraticEquation，treeBiomass，treeTotalBiomass
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注：
注1：为了方便大家学习，本文档为生物统计家园网机器人LoveR翻译而成，仅供个人R语言学习参考使用，生物统计家园保留版权。
注2：由于是机器人自动翻译，难免有不准确之处，使用时仔细对照中、英文内容进行反复理解，可以帮助R语言的学习。
注3：如遇到不准确之处，请在本贴的后面进行回帖，我们会逐渐进行修订。
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发表于 2012-10-1 11:48:04
