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。
PWM wave is generated by splitting Zero vector quasi circular locus method.
该系统用零矢量分割的准圆轨迹法生成pwm波形。
Based on the method of SVPWM, various forms of phase voltage waveforms are generated by adjusting the duty time of the two zero vectors and the duty order of every vector.
在空间电压矢量形成PWM波的基础上，通过两个零矢量作用时间的不同分配及调节各矢量作用顺序，形成了不同形式的相电压波形。
Under Galilean transformations, expressions of Veloeities and accelerations in vertical curve Coordinates are derived by the ingenious use of Zero Vector and means of matrix.
在伽例略变换下，巧妙利用零矢量，给出了任意正交曲线坐标系中质点速度和加速度的矩阵表式方法。
In the space vector PWM technology a large number of PWM methods can be generated with different distributions of the two zero vectors which would have great influence on the inverter characteristic.
空间矢量pwm控制技术中两个零矢量的不同分配方案会产生多种PWM方式，并且会对逆变器的控制特性产生重要影响。
The function in Listing 20 returns a vector of vectors. This is because each document could generate zero to many map entries, and each map entry is represented as a vector.
清单20中的函数返回矢量的矢量，这是因为每个文档都可能生成零到多个映射条目，而每个映射条目都被表示为一个矢量。
And, if you take a vector field where maybe everything is rotating, a flow that's just rotating about some axis, then you'll find that its divergence is zero.
如果取一个有旋的向量场，流体流动方向是环绕某个坐标轴的，那么就会发现它的散度是零。
You have to add this vector to have zero so this is minus a and so minus a is nothing but the same as a but flipped over 180 degrees.
你需要加上这个矢量来得到，负a是这样，因此- A和A几乎一样，只是转了180度。
So, to say that a vector field with conservative means 0 that the line integral is zero along any closed curve.
一个保守的向量场就是说,沿任意闭曲线的线积分的结果是。
There is another thing that we know because if a force derives from a potential 0 then that means its curl is zero Thats the criterion we have seen for a vector field to derive from a potential.
我们还知道,如果力是由势产生的,那么其旋度是,这就是我们得到的,关于从势产生的向量场的准则。
A quantum state is a vector whose overall length is of no interest to us (as long as it's not zero).
量子态是向量，我们并不关心其总长度(只要不是0)。
v0 And there is an angle between ; the position vector and v zero; 0 I call that phi zero.
在方位向量和,之间，有一个夹角;,我们叫它φ
Well, we've seen this criterion that if a curl of the vector field is zero and it's defined in the entire plane, then the vector field is conservative, and it's a gradient field.
我们已经知道了一个准则，如果向量场的旋度为零，而且它在整个平面上有定义，那么这个向量场是保守的，而且它是个梯度场。
If you take a vector field that is a constant vector field where everything just translates then there is no divergence involved because the derivatives will be zero.
如果取的向量场是处处恒定的，所有点都是平移关系，所以没有散度，因为导数为零。
OK, so, we've seen that if we have a vector field defined in a simply connected region, and its curl is zero, then it's a gradient field, and the line integral is path independent.
一个向量场,如果定义在单连通区域并且旋度为零，那么它就是一个梯度场，并且其上的线积分与路径无关。
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。
OK, so let's assume that we have a vector field whose curl is zero.
假设有一个旋度为零的向量场。
In so far as linear motion is concerned, a body is in equilibrium if the vector sum of the forces acting upon it is zero.
就线性运动而论，如果作用于严格物体上的诸力的矢量之和是零，那么这个物体就处于平衡状态。
So, no matter how you say it, this is always zero. So, in a way, this reinforces our intuition that del, even though it's not at all an actual vector sometimes can be manipulated in the same way.
因此，无论你怎么描述它，它总是0，那么在某种程度上，这加强了我们的直觉，即▽有时也可以用同样的方式计算,即使它并不是真正的向量。
So, see, this coefficient becomes zero exactly when the line is perpendicular to the normal vector.
看到了吧，系数变为0了，当直线垂直于法向量的时候。
So if you've done the problem sets and found the same answers that I did, 0 then you will have found that this vector field had curve zero everywhere.
如果你们做了习题集,发现了和我一样的答案，你就会发现向量场的旋度在曲线上处处为。
Double space vector modulation can realize zero current commutation of the rectifier side, greatly reduce the switch loss, and improve the efficiency of the converter.
双空间矢量调制两级协调控制能实现整流级零电流换流，极大地减少了开关损耗，提高了变换器的效率。
For the case of planar interception, the so called relative heading error angle between the relative velocity vector and the LoS (Line of Sight) is chosen as the output to be controlled to zero.
针对平面拦截问题，选择导弹和目标之间的相对速度矢量与导弹-目标视线之间的夹角（称为相对航向误差角）作为将要被控制到零的输出。
As a result, each document is represented with respect to all such features (all documents have the same number of features) but most of the values will be zero, creating a very sparse vector.
作为一个结果，每个文档表示相对于所有这些特征(所有文件有相同数量的功能)，大部分的值将为零，一个非常稀疏向量生成。
Finally, in order to fix on the position of nonzero lattice vector effectively, that is, to deal with zero lattice vectors effectively, the concept of significant map is introduced into.
最后为了有效确定非零格点的位置，也就是为了有效地处理零格点，又引进了重要图的概念。
The results show that the phase error of the vector measurement is zero, and amplitude errors can be eliminated, and high measurement accuracy can be obtained by using low bit D/A converter.
结果表明，相位测量的理论误差为零，幅度测量的理论误差可用修正系数消除，且使用较低位数的D A转换器，可得到高准确度的结果。
A new zero-watermark copyright protection algorithm for 2d vector maps is proposed.
提出了一种新的二维矢量数字地图的零水印算法。
If information rate vector is kept within the capacity region, then error probability of message delivery can be taken arbitrarily close to zero.
如果通信系统的通信速率在信道容量之内，那么我们可以设计信道编码使得通信的误码率无限接近于零。
If information rate vector is kept within the capacity region, then error probability of message delivery can be taken arbitrarily close to zero.
如果通信系统的通信速率在信道容量之内，那么我们可以设计信道编码使得通信的误码率无限接近于零。
应用推荐