Find the gradient. Find an approximation formula.
求梯度和近似公式。
But, it's the usual approximation formula using the derivative.
但都是使用导数的逼近公式。
In fact, it still works in the general case using this approximation formula.
事实上，在一般情形做近似时，之前的结论仍然适用。
The second one, well, we know the approximation formula already, so I don't need to justify it for you.
第二个，先前已经知道了和这个差不多的公式，所以也不需要给你们证明了。
The value which was calculated using this approximation formula of pulse duration was close to that of solving the rate equations by computer.
使用脉宽表示式计算的结果与计算机数值计算相符。
The prediction formula of yearly production and the approximation formula for reduction between the instantaneous production and yearly production are also presented.
给出了年产量预测公式及瞬时产量与年产量相互换算的近似公式。
Here is another approximation formula come from practice to determine the explosive consumption. It is more practical and could be calculated precisely without the table.
现通过实践，推导出单位炸药消耗量的近似计算公式，与查表求出的数值基本吻合，从而更具有实用性。
In this paper, a approximation formula of SF6 saturated steam pressure curve is proposed, and the accuracy of the formula is verified by comparing with the standard curve.
提出了一种新的SF6气体饱和蒸汽压曲线的拟合公式，并和标准曲线数据加以比较，确认了其准确性；
The following an detailed statement on scaling liquid position by introducing experiential formula of ellipsoid approximation.
文章就引进椭球冠近似值经验公式标定液位之意进行详细阐述。
The conclusion supports the basic principle of the special theory of relativity, and regresses to the formula of classical theory naturally in low speed approximation.
其结论支持狭义相对论的基本原理，并且在低速近似下，自然回归到经典物理的公式。
The process of structuring the multi-lateral horizontal well productivity formula was carefully studied, and two theory defects and three mathematical approximation were detected.
本文仔细研究了分支水平井产能公式的架构过程，发现存在两处理论缺陷和三次数学近似。
Nonlinear directly estimating formula for exponential curve which, through fixed point, was derived, by using first order approximation of Taylor expansion.
运用泰勒展开的一阶近似估计推导过定点的指数曲线的非线性直接估计公式。
This paper plots out the productivity formula for vertical fractures in low permeable reservoirs using approximation and correction method.
通过近似和修正方法得出了低渗透垂直裂缝油藏的产能公式。
The simplified Kochin function and the corresponding linear wave resistance formula for shallow water are derived by an analysis of the order of magnitude and approximation.
借助量级分析和近似处理，导出了简化浅水柯钦函数和相应的浅水线性波阻公式。
Not only a new expression of the turbine's discharge and differential pressure of the Spiral case was proposed, but also the detailed approximation process and computing formula were given.
并给出了新的水轮机流量与蜗壳压差关系表达式，同时也给出了详细的逼近计算过程和计算公式。
To actually apply this it helps to go to something called the normal approximation to the binomial, because it's kind of difficult to compute this formula.
在实际应用这些公式的时候，需要运用二项分布的正态近似定理，因为二项分布公式的值很难计算。
No analytic formula have been solved from mortgage pricing equation with prepayment, and approximation methods limited in their application.
带有提前支付特性的期权定价方程无法直接求出解析解，而传统的近似方法有其局限性。
By using the method of small parameter expansions the present boundary-value problem is solved. Thus the formula in the second approximation for the stress field is obtained.
本文运用小参数展开法求解了这一大变形问题，获得应力场的二级近似公式。
Analytic approximation method is introduced in the chapter five and we make an adjustment of BAW formula.
第五章介绍美式期权的近似解析解，并在著名的BAW公式上进行修正，得出新的公式并进行数值试验。
Note: This is not an exact measurement or an exact formula and should be treated as a rough approximation.
注意：这不是十分准确的测量或一个准确的公式，这只是个近似值而已。
After adequate approximation and simplification, the formula obtained is checked by the actual data and the computational results are in agreement with the empirical values.
在作了适当近似和简化后，本文以实际数字对所求得的公式作了检验，计算结果和经验值吻合较好。
This paper presents the fold line approximation method of discrete Fourier Series, and conducts calculation formula of harmonics.
提出了计算离散傅氏级数的折线逼近法，并导出了其幅值计算式。
The unique existence of the best element of approximation is proved and the formula of the best element of approximation is given.
证明了最佳逼近元的唯一存在性，并给出了最佳逼近元的计算公式。
Deducing the computing formula for analytical solution of approximation theory and using experiments to testify the compute and contrasting the three computer methods.
给出了近似理论解析解的计算公式，并用实验的方法对有限元计算和近似理论解的计算进行验证，并比较了三种方法的优缺点。
It is pointed out that Peters'equation is just the formula with first order approximation.
指出该公式只是一阶近似意义下的公式，并导出二阶近似、三阶近似意义下的公式。
Multi-point formula, depending on the segmented linear approximation, turns out to be effective in correcting the no…
多点法使用分段线性逼近的方法对非线性推移有良好的校正效果。
The suggested formula features simplicity in calculation, perceptibility in appearance, and close approximation of calculated resistances to that of the model tests.
此公式具有计算简便，表达直观，计算与船模试验阻力值较逼近的特点。
The suggested formula features simplicity in calculation, perceptibility in appearance, and close approximation of calculated resistances to that of the model tests.
此公式具有计算简便，表达直观，计算与船模试验阻力值较逼近的特点。
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