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1·Now, what's the gradient vector?

现在，梯度向量是什么呢？

2·So, if you prefer, that's where the gradient vector is zero.

认为梯度向量为零也是可以的。

3·The gradient vector would be going perpendicular to the level.

梯度向量应该垂直于等值线。

4·If I fix a point, then the gradient vector at that point is given to me.

确定一点，那么对我来说，这点的梯度向量就是确定的。

5·v So -- So if the gradient vector is perpendicular to v OK, that's a good start.

所以梯度向量垂直于,很好，这是一个很好的开始。

6·So, we said when we have a function of two variables, we have the gradient vector.

我们说，当一个二元函数存在时，就有梯度向量。

7·And we have learned how to package partial derivatives into a vector, the gradient vector.

我们也知道了，如何将各个偏导组合成一个梯度向量。

8·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。

9·In this thesis, a new deformable model called Iterative Gradient Vector Flow (IGVF) is developed.

本文提出了迭代梯度矢量流参数变形模型(IGVF)。

10·We presented a novel and fast convergent skeleton snake model based on gradient vector flow (GVF).

提出了一种基于梯度矢量流(GVF)的快速收敛骨架snake算法。