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单词 Unit vector
例句
1. Now, how do we get this unit vector?
2. It's the unit vector in the vertical direction.
3. "Roof" always means unit vector.
4. A unit vector in the direction of the projection of normal to T.
5. It has a hat because it's a unit vector, and T because it's tangent.
6. So, if you want a unit vector that goes in the same direction, 1 all you have to do is rescale it, so, at its length becomes one.
7. And this is the unit vector in the y direction and this is the unit vector in the z direction.
8. Now, another useful notion is the unit vector to the trajectory.
9. So, that means this actually should be the unit vector.
10. OK, so if I give you a unit vector, you can ask yourself, if I move in the direction, how quickly will my function change?
11. Ax which is the unit vector in the x direction, y plus Ay y roof Z plus Az Z roof.
12. But if I want a unit vector, then I should scale this down to length one.
13. A unit vector normal to the plane of and N , which is the plane of curvature.
14. For drill point with planar flanks, using toolroom microscope, we measure the angles relevant to unit vector on the flanks and transform these data into design parameters.
15. I take my point on the surface and build a unit vector that is standing on it perpendicularly.
16. And so that means that any vector u, any unit vector tangent to the level set of g is going to be perpendicular to the gradient of f.
17. So, I'm going to draw it in red. OK, so that's a unit vector that goes along the curve, and then the actual velocity is going to be proportional to that.
18. Sorry, first of all in case you wonder what this is all about, b so let's say the components of our unit vector are two numbers, a and b.
19. It has two terms: k1 times v-- this is the speed, - this is always positive-- and this is the unit vector of the velocity.
19. try its best to gather and make good sentences.
20. You'll see why very soon, in such a way that the derivative is this given unit vector u hat.
21. So, let me divide this by rho to get a unit vector.
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