提出误差推导的一种新方法，利用向量旋转及坐标系变换理论推导出误差公式。
Deducing error equation that used vector rotating and transfer of axes theory, Measuring out measurement parameter error on different orthogonality by testing optical-electrical device.
所以记住，在上次课还是第一节的时候我们知道，要把一个向量旋转90度，我们要把变成。
So, remember: what we saw last time or in the first lecture is that, to rotate a vector by 90 degrees, we should change to.
我们需不需要掌握如何旋转向量这些知识点？
我们记得，这是个以单位速度旋转的向量场。
Remember that was the vector field that looked like a rotation at the unit speed.
其实私下里我想了很久，才找到R的这些元素来表示，怎样使其它向量逆时针旋转90度。
Secretly, I worked pretty hard to find what are the entries that would tell me how to rotate something by 90 degrees counterclockwise.
这是一个绕原点逆时针旋转的向量场。
It's a vector field that just rotates around the origin counterclockwise.
这是一个向量场，其中旋转轨道是，以z轴为圆心的圆周，并且这个向量场与每个圆相切。
That is a vector field in which the trajectories are going to be circles centered in the z-axis and our vector field is just going to be tangent to each of these circles.
为精确诊断旋转机械的故障，提出一种基于小波包特征向量的神经网络故障诊断方法。
To diagnose accurately the rotation machine fault, this paper presents a new method of fault diagnosis based on wavelet packet energy eigenvector and neural network.
本文研究在平面旋转向量埸中，奇异闭轨线随参数变动的情况。
In this paper we have discussed the situation of the variation of the singular closed trajectories with a parameter in plane rotating vector fields.
另外，针对进行相似性变换的目标也提出了一种新的候选目标模型，并用类似的梯度下降算法估计目标的平移向量和旋转角度。
Furthermore, a new candidate model is proposed that handles similarity transformation, and the corresponding MS algorithm can be obtained that estimates the translation vector and rotation Angle.
图像梯度修正是将图像梯度方向旋转到尽量与法向量在图像平面的投影反向一致的方向上。
The revision of the image gradient is to revolve it to the reverse direction of the normal vector's projection on the image plane.
图像梯度修正是将图像梯度方向旋转到尽量与法向量在图像平面的投影反向一致的方向上。
The revision of the image gradient is to revolve it to the reverse direction of the normal vector's projection on the image plane.
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