对数公式

所谓Ⅰ型分布，是指沿整个水深仍可用对数公式表达，但K值变小的分布。

In pattern ⅰ, the velocity distribution still corresponds with the logarithmic formula except that the value of k is smaller than that in non-particle flows .

然而，在不同水流与边界条件下，其指数公式中的指数大小与对数公式中的有关参数有所不同。

However , under the different conditions of flow and boundary , exponent values in the exponential formula and related parameters in the logarithmic formula are different .

粗糙床面非均匀流的水槽试验表明，非均匀流断面的垂线流速分布需用两个对数公式分别描述；粗糙床面的流速分布较光滑床面不均匀；

Results of the flume experiments on non-uniform flow over a rough bed show that the vertical distribution of velocity on a channel section needs to be divided into two regions with different log velocity distribution equations .

作为极限情况，本文还推出了导体表面为圆球面、圆柱面以及平面时，对数插值公式的特殊形式。

Three particular forms are also derived from the logarithmic interpolation formula in the conditions in which the conductor surface are spherical , columnar and plane , respectively .

利用Γ函数对数微商公式，较详细地分析了X~2分布密度函数的性质，研究参数n对密度函数曲线的影响。

In Chapter 5 , Use the logarithmic derivative formula of Г function , analysis the characters of X2 distributed density function in detail , and the effects of change of the parameter on density curve .

一个计算分子中心原子价层电子对数的新公式

A New Formula for Calculating the Valence Shell Electron Pairs of Centre Atom in Molecular

作者通过研究，首次给出了含硫、含磷的杂硼烷的结构通式和骨架成键电子对数的计算公式。

In this paper , we first presented our formula of heterborane ( contain S , P ) 's general structure and number of base bonding electron pairs .

经过数据重建后所作的数字图像比原始热像有更高的缺陷显示度或分辨力，其中以三次对数多项式回归公式中的二次项系数所作的数字图像的信噪比最大。

The digital images from data reconstruction have clearer defect display or higher defect resolution than the raw thermal images , and the quadratic coefficient image of cubic logarithm regression shows the highest SNR .

本文根据常用的指数、对数流速分布公式，从理论上分析了在不同的流速分布条件下，现行常用的几种垂线平均流速近似计算公式的误差。

In accordance with commonly adopted index and logarithmic formula of velocity distribution analyzes the theoretical errors of several current approximate formula for computing vertical mean velocity on the condition of different velocity distribution .

然后，按将水力半径分为河床阻力水力半径和河岸阻力水力半径的方法和对数流速分布公式，计算垂向流速分布。

Then the method , which divides hydraulic radius R into river bank hydraulic radius Rw and river bed hydraulic radius Rb , and the formula of logarithmic velocity distribution are used to compute velocity distribution in vertical line .