The natural logarithm of this ratio is called the logarithmic decrement.
此比率自然对数称为对数的减量.
The natural logarithm of DBH ( lnD) and square diameter ( D~ 2) were included in the predicting models of diameter increment for all 15 species.
在全部15个树种的直径生长量预估模型中,均包含了InD和D~2二个变量。
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