自然对数

准确地说，它与n的自然对数成正比。

more precisely , it increased as the natural logarithm of n.

也就是给定一个参数x，该自然对数返回e的几次幂等于给定的值x。

That is , given an argument x , the natural logarithm returns the power to which e must be raised to give the value x.

E属性返回自然对数的底数的值，或

The E property returns the value of the base of natural logarithms , or

在科学与工程学领域，e代表自然对数的基数，约等于2.718。

In science and engineering , ' e ' refers to the base of natural logarithms , approximately 2.718 .

以e为底的对数（自然对数）出现在复合计算以及大量科学和数学应用程序中。

Logs base e ( natural logarithms ) appear in the calculation of compound interest , and numerous scientific and mathematical applications .

为了改善正态近似性，用自然对数尺度来构造成对u检验统计量。

The pairwise u-tests are constructed on the natural logarithmic scale so as to improve the normal approximation .

遗憾的是，Java语言的（以及C、Fortran和Basic的）自然对数函数错误命名为log（）。

Sadly , the Java language 's ( and C 's and Fortran 's and Basic 's ) natural logarithm function is misnamed as log () .

注意（6.76）和（6.77）中的e分别代表两种不同的意思：自然对数底和质子电荷。

Note the e stands for two different things in ( 6.76 ) and ( 6.77 ) : the base of natural logs , and the proton charge .

而在累积叶面积指数（F）不变的情况下，消光系数（K）与相对照度的自然对数成正比；

In the changeless condition of leaf acreage index ( F ), coefficient of light extinction ( K ) is of direct proportion to the natural logarithm of relative illumination ;

对于SAR图象的压缩编码，通过一个自然对数变换，使得乘性噪声转变为适于软门限去噪的加性噪声。

Especially for SAR image , a natural logarithm transfors multiplicative noise to additive noise so that SAR image can be suppressed via the soft threshold denoising scheme .

计量资料采用配对样本t检验，正态分布数据以X±s表示，非正态分布数据，将其取自然对数正态化后再进行下一步的数据分析。

Measurement data using paired sample t test , normal distribution of data to X ± s said that the non-normal distribution of data , its natural logarithm normalized data analysis before the next step .

HOMA-IR、HOMA-B、ISI呈偏态分布，取自然对数转化为符合正态分布后再进行统计分析。

Homa-IR , HOMA-B , ISI showed skewness distribution , taking natural logarithms converted to meet normal distribution , and did statistical analysis .

利用已建立的原生动物种类污染值SPV，结合化学指标计算原生动物群落污染值CPV，并与水质化学综合污染指数Pb的自然对数进行相关性分析。

The paper uses the Species Pollution Value ( SPV ) which had been built , Combines five chemical indexes to calculate the Community Pollution Value ( CPV ), and then combines with the CPV with the logarithm of chemical compositive pollution index ( Pb ) to do correlative analysis .

变形过程中发生了动态再结晶且晶粒平均尺寸随变形参数的不同而改变，其自然对数与ZenerHollomon（Z）参数的自然对数成线性关系；

Dynamic recrystallization ( DRX ) takes place during the deformation process , and the average dynamically recrystallized grain size ( d_ ( rec )) changes with deformation variables . The natural logarithm of d_ ( rec ) is linear with the natural logarithm of Zener-Hollomon ( Z ) parameter .

图像灰度值自然对数比率邻域滤波方法

Gray-level value natural logarithm ratio neighborhood filters method for image denoising

基于峰度自然对数最大化的信号盲分拣算法和盲波束形成

A logarithm-kurtosis based complex algorithm for blind signal extraction and blind beamforming

此比率自然对数称为对数的减量。

The natural logarithm of this ratio is called the logarithmic decrement .

这种形式的积分结果，是自然对数。

The integral of one over a quantity is the natural log .

返回数值的自然对数。

Returns the natural logarithm of a specified number .

返回一个数的自然对数。

Returns the natural logarithm of a number .

计算四元数的自然对数。

Calculates the natural logarithm of a quaternion .

返回γ函数的自然对数。有关方程式的信息，请参阅帮助

Returns the natural logarithm of the gamma function . See Help for the equation used

两种表面霜层相对厚度呈自然对数分布。

The relative thickness of the frost layer on both surfaces obey the natural logarithm law .

函数的作用是：返回一个数值的自然对数。

The log () function returns the natural logarithm ( base E ) of a number .

除此之外，我们还选取了公司总资产的自然对数以及净资产收益率作为控制公司特征的控制变量，共同构成了本文的多元回归方程。

We also select the natural logarithm of total assets and ROE as the control variables .

老果园土壤和新果园土壤全磷浓度都服从自然对数正态分布。

Old orchard soil and new orchard soil the whole phosphorus concentration obey natural logarithm normal distribution .

对于注水开发油田来说，稳产阶段的采油速度的自然对数与注水速度的倒数呈直线下降的关系。

During stable production period , the natural logarithm value of oil productivity was negatively correlated with reciprocal of water-injection rate .

为了排除异方差问题，我们对两个变量的相应数据取了自然对数。

In order to rule out the heteroscedasticity problem , we adopt the natural logarithm from the two variables corresponding to the data .

以自然对数函数展开式的另一多重分割法作为抽象三角函数的应用。

In this paper , the author applies another method of multi - for expansions about the logarithmic function to the abstract triangle function .

选择三次实验杂交比值的平均值自然对数绝对值≥0.69作为判定基因表达差异标准，筛选出各药物作用的早期反应基因。

Genes were identified as differentially expressed if the absolute value of the natural logarithm of the average ratios of three independent experiments was 0.69 .