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1·And that's basically, yes, that's the directional derivative.

基本上是的，那就是方向导数。

2·Well, it's actually the directional derivative in that direction.

它其实是那个方向的方向导数。

3·The directional derivative according to the vector fields was introduced.

引入了相应于矢量场的方向导数。

4·We discuss several different definitions of directional derivative and gradient vector.

讨论了几种不同的方向导数和梯度的定义。

5·The directional derivative in a direction that's perpendicular to the gradient is basically zero.

垂直于梯度的方向上,方向导数为零。

6·Secondly, the new generalized gradient is introduced to take advantage of the given directional derivative.

其次讨论了一类新的广义梯度，这样的广义梯度能够充分利用已经有的方向导数的信息。

7·And,the slope is going to be the directional derivative in that direction OK, I think that's as graphicas I can get.

这个斜率就是此方向的方向导数,好了，我想我说的已经尽量图形化了。

8·The paper offers a dual problem for the semi-infinite convex programming by using the directional derivative with zero dual gap.

本文对半无限凸规划提出一个用方向导数表述的对偶问题，其对偶间隙为零。

9·Then, we define a class of tangent cone F convexity in terms of the tangent cone directional derivative, and prove the sufficient optimality conditions for (VP).

然后利用正切锥方向导数定义一类正切锥F 凸函数类，并给出了（VP）正切锥真有效解的充分性条件；

10·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。