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外积

n.exterior product; apposition
网络outer product; cross product; buildout

外积

英-汉网络释义

外积

n.

1.exterior product

2.apposition

3.build-out

1

We have also learned that the direction of the cross product is given by taking the direction that's perpendicular to A and B .

我们还学过，外积的方向，与 A 和 B 均垂直。

2

Let me just point out one important application of cross product that maybe you haven't seen yet.

现在我说下外积的一个重要应用，可能你们还不知道的。

3

Objective To evaluate CT and MRI for the diagnosis of cranial extradural empyema .

目的评估 MR和 CT 对颅内硬膜外积脓的诊断价值。

5

That 's actually the same formula that we are using for cross products .

这和求外积的那个公式，其实是同一个公式。

6

So, typically , we use cross product to find plane equations .

特别地，可以用外积来求平面方程。

7

So it's still perpendicular to the same plane .

所以这个外积还是垂直于同一个平面。

8

So, these two quantities , P1P dot the cross product, or the determinant of the three vectors, They are always equal to each other.

呃，这两个数，P1P 点乘，这个外积，或者乘以这三个向量的行列式，不管怎样都是相等的。

9

And, we can also use that to find a vector perpendicular to two given vectors, A and B .

还可以用外积来找到一个向量，使它和给定的向量 A 及 B 垂直。

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