And that is an approximation for partial derivative.
这就是偏导的近似值。
OK, so that's the definition of a partial derivative.
好的，那就是偏导数的定义。
So, at that point, the partial derivative is zero with respect to x.
因此这点上x的偏导为零。
Well, we have seen that it is given by the partial derivative f sub x.
我们已经发现,它由f对x的偏导数给出。
Somehow, when you have a partial derivative, you must resist the urge of simplifying things.
当遇到偏导数时，一定记住，不能约分。
We will replace the partial derivative by an ordinary derivative.
我们可用普通微商代替偏微商。
Its partial derivative equation is solved by alternating direction implicit algorithm.
采用交替方向隐式算法求解偏微分方程。
The numerical partial derivative is introduced to simplify the GPS network adjustment model.
采用数值微商求偏导数的方法，从而使GPS网平差的计算模型非常简洁。
That was this symbolic vector operator in which the components are the partial derivative operators.
这个是符号化的向量算子，其中它的分量是偏微分算子。
In this paper, the formula of partial derivative of second order on compound function of many varables is established.
本文建立了多元复合函数的二阶偏导数公式。
Then, a new method testing the double fault of combinational circuits based upon Boolean partial derivative is proposed.
在此基础上提出了基于布尔偏导数的组合电路双故障检测的新方法。
The mathematical model between position error and north seeking error is gotten through error theory and partial derivative principle.
运用误差理论和偏导数原理，推导出转位误差与寻北误差二者之间的关系模型。
Batch training of network makes weight vectors and its partial derivative vectors proportionally follow the change of all training vectors.
网络成批训练，使得权重矢量和偏导数矢量都同时与所有训练矢量的变化成正比地改变。
In this paper, symmetric derivative and symmetric partial derivative are researched and some new differential mean value theorems are defined.
针对对称导数、对称偏导数，给出了一些新形式的微分中值定理。
The criterion extreme value of binary function for first partial derivative is given by means of the mean value theorem. The two theorems are obtained.
以中值定理为工具，给出了利用一阶偏导数判定二元函数极值的方法。
For the ballistic missile using perturbation guidance, the computation of partial derivative at shutdown point is very important for data calculation and validation.
对摄动制导的弹道导弹而言，关机点偏导数和全导数计算及其校验是导弹诸元计算中的重要环节。
Concept and operation rules of generalized partial derivative of multivariate function are given basis on generalized derivative of single variable function in this paper.
在一元函数广义导数定义的基础上，提出了多元函数广义偏导数的概念，相应地建立了广义偏导数的运算规则，获得了有关的一些性质。
A discussion of the relations between continuity, partial derivative, directional derivative and differentiability of binary function is helpful for us to study binary function.
探讨二元函数的连续性、偏导数、方向导数以及可微性之间的关系，有助于我们对二元函数的学习。
Powell method is used in the paper to calculate the reliability index, this method can avoid the complexity of partial derivative calculating, and the example shows that this method is correct.
研究了用方向加速法来进行结构可靠指标的计算方法，该法可以避免对功能函数进行导数计算，并已算例说明该方法的正确性。
Here we expound two approaches to GPS corrections model by Partial Derivative Algorithm(PDA) and Linear Interpolation Algorithm(LIA), then probe their advantages and disadvantages.
对偏导数算法（PDA）和线性内插算法（LIA）两种改正数模型化方法进行探讨，并说明两种方法的优缺与应用范围。
Here we expound two approaches to GPS corrections model by Partial Derivative Algorithm(PDA) and Linear Interpolation Algorithm(LIA), then probe their advantages and disadvantages.
对偏导数算法（PDA）和线性内插算法（LIA）两种改正数模型化方法进行探讨，并说明两种方法的优缺与应用范围。
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