Does the gradient vector, why is the gradient vector perpendicular in one direction rather than the other?
梯度向量的垂直方向，为什么是这样而不是另外一个方向？
And, the direction is essentially that of a vector.
方向基本和这里的单位切向量一致。
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?
也就是，如果我给你一个单位向量，试问，我沿着这个方向移动，我的函数值会变化得多快呢？
Only the direction of the vector, the ratios between the component amplitudes, is important.
只有向量方向，即分振幅之间的比值，是重要的。
Therefore, the optimal solution is the farthest point on the polyhedron boundary from the axis' origin using the direction (1,-1) as a direction vector.
因此，优化解决方案是从轴的原点沿 (1,-1)方向作为方向向量指向多面体边界的最远点。
The general idea is that you need a direction vector that is orthogonal to the lit surface.
总的来说，您需要一个与照射平面相垂直的方向向量。
And so the direction of the vector is such that you will see the tip of the vector as though it's coming straight out of the blackboard.
因此矢量的方向，是你们将看到的，这个点，就好像它是从黑板里面，戳出来的一样。
And I applied the torque in this direction, the vector.
我的力朝这个方向，矢量。
That one would be pointing kind of to the back slightly up maybe, so like that. And now your middle finger is going to point in the direction of the normal vector.
曲面的方向有点向后向上,应该差不多像这样，那么现在你的中指,指的方向就是法向量的方向了。
And we looked at the component of a vector field in the direction that was normal to the curve.
我们研究的是，向量场在曲线法向量方向的情况。
It's the unit vector in the vertical direction.
即竖直方向的单位向量。
So, maybe if I actually stated directly that way, see, I'm just saying the velocity vector has a length and a direction.
也许我们可以这样理解，看，我说过速度矢量有模长和方向。
A vector has a length and a vector has a direction and that's why we actually represent it by an arrow.
矢量有，长度也有方向，因此通常，用箭头来表示。
We'll be slicing things by a plane that is now in the direction of this vector,u and we'll be looking at the slope of the slice of the graph.
用沿着向量方向的平面,切开图像,然后看图像的剖面图，找出斜率。
What is the direction of the vector?
矢量c的方向是什么？
This value can be negative to extrude in the direction opposite the Face object's normal vector.
这个值可以为负，从而在Face对象的法向量的反方向上挤压。
Suppose A itself is the unit vector in the y direction B Then A dot B is what?
假设A是y方向上的,单位矢量,则是z方向上的单位矢量。，and，B，is，the，unit，vector，in，the，z，direction。,那A点B是多少呢？
So, what that means is that if I look at my trajectory at this point, that the acceleration vector is pointing in that direction.
这意味着如果我们在这点观察运动的轨迹，它的加速度是指向这个方向的。
But it could be that, well, imagine that my vector field accidentally goes in the opposite direction then this part of the curve, while things are flowing to the left, contributes negatively to flux.
的确有可能出现往两个方向流动的情况，可以想象到，这一小部分往相反方向流动，当流体向左流时，就只能算作负值了。
An experiment can change the state vector arrow, projecting it in just one direction in the space.
一个实验能改变量子态方向，让它只在空间的一个方向上。
Zero vector can have a lot of direction, but only one length.
零向量可以有很多方向，却只有一个长度。
Calculates the direction vector of the hand relative to the controller.
计算手掌相对于控制器的方向向量。
That is, it creates a 3-d figure by extruding in the direction of the Face object's normal vector.
也就是说，它在Face对象的法向量方向上进行挤压，创建一个3 - D图形。
Nor: Uses the direction of the normal vector as coordinates. This is very useful when creating certain special effects (see below).
法向：使用法向量的方向作为坐标。这在创建某些特效时非常有用（见下文）。
Refl: Uses the direction of the reflection vector as coordinates. You will need this input when Environment Mapping.
反射：使用反射向量的方向作为坐标。环境映射需要这种输入。
A vector graphic is a series of commands that describe a line's direction, thickness, and color.
矢量图像是一系列描述线段的方向、线宽和颜色的命令。
Diffraction direction of a ray passing a crystal for symmetrical or asymmetrical reflection is calculated from the vector form of Laue diffraction equation.
根据劳厄衍射方程的矢量形式计算光线经对称或非对称晶体衍射后的方向。
Vector quantities are those that have both a magnitude and a direction.
矢量是既有大小又有方向的量。
To fly the aircraft in anything other than a hover the control vanes are used to create a force vector to tilt the machine in the desired direction much like a Helicopter rotor.
飞行中的飞机以外的悬停控制叶片被用来创造一个倾斜力向量机在希望的方向就像直升机旋翼。
To fly the aircraft in anything other than a hover the control vanes are used to create a force vector to tilt the machine in the desired direction much like a Helicopter rotor.
飞行中的飞机以外的悬停控制叶片被用来创造一个倾斜力向量机在希望的方向就像直升机旋翼。
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