natural logarithm

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.

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

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。

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.

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。

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

准确地说，它与n的自然对数成正比。

A Digital Investigation of Exponential and Natural Logarithm Transducers

指数型、对数型传感器的数字线性化方法

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;

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；

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

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（）。

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

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 a specified number.

返回数值的自然对数。

The natural logarithm of orthogonal results of stir options, adsorption time, adsorption temperature and content of sodium chloride added was taken, and the significant analysis of variance of test groups was carried out with Duncan test.

搅动方式选择、吸附时间、吸附温度及氯化钠加入量正交结果取自然对数后进行方差分析，采用邓肯检验进行组间显著性分析。

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

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。

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

两种表面霜层相对厚度呈自然对数分布。

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.

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。

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

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。

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.

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Zener Hollomon（Z）参数的自然对数成线性关系；

Returns the natural logarithm of a number.

返回一个数的自然对数。

The data catch reading unit and natural logarithm transform unit were added to NIOS II system as User-defined logic, and could be used directly while programming.

其中缓存数据的读取及对数变换均采用自定义组件的方式将硬件单元添加到NIOS ii系统中，编程时直接调用。

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.

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。

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。

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

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。

Calculates the natural logarithm of a quaternion.

计算四元数的自然对数。

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

函数的作用是：返回一个数值的自然对数。

The safe index of design performance is defined as the negative natural logarithm of structural failure probability in this paper. The safe grade of design performance is got by calculating the one-order partial derivative of the structural failure probability to the reliable indication of every structural element.

定义结构失效概率的自然对数的负值为设计性能安全指数，通过计算结构失效概率对各构件可靠指标的一阶偏导数的方法，求出结构的设计性能安全等级。

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

图像灰度值自然对数比率邻域滤波方法

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

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。