轴旋转

This technique uses a spiral phase plate with a small central aperture placed on the Fourier plane of so imaging system. If the spiral phase filter is rotated by a certain angle around its central axis, a phase shift between the zero-order spatial frequency component and the remaining of the object is produced, and the magnitude of this phase shift is proportional to the rotation angle. Using this property, we can record a sequence of intensity distribution of the output beams corresponding to different rotation angles, and then digitally reconstruct the objects by using a phase-shifting algorithm. Both the theoretical analysis and simulation experiment results demonstrate the feasibility of this approach.

在成像系统的频谱面上放置中心带有一通光孔径的螺旋相位板，在输出面上记录输入物体经螺旋相位滤波后的输出像；将螺旋相位滤波器绕轴旋转一定角度，通过中心光孔的零频成份与其他高频成份间会产生与旋转角度成正比的相移；利用这一特点，通过记录多幅对应不同旋转角度的输出光场强度分布图，然后再用一定的相移算法实现被记录物体相位分布的数字再现。

This technique uses a spiral phase plate with a small central aperture placed on the Fourier plane of an imaging system. If the spiral phase filter is rotated by a certain angle around its central axis,a phase shift between the zero-order spatial frequency component and the remaining of the object is produced,and the magnitude of this phase Shift is proportional to the rotation angle. Using this property,we can record a sequence of intensity distribution of the output beams corresponding to different rotation angles,and then digitally reconstruct the objects by using a phase-shifting algorithm. Both the theoretical analysis and simulation experiment results demonstrate the feasibility of this approach.

在成像系统的频谱面上放置中心带有一通光孔径的螺旋相位板，在输出面上记录输入物体经螺旋相位滤波后的输出像；将螺旋相位滤波器绕轴旋转一定角度，通过中心光孔的零频成份与其他高频成份间会产生与旋转角度成正比的相移；利用这一特点，通过记录多幅对应不同旋转角度的输出光场强度分布图，然后再用一定的相移算法实现被记录物体相位分布的数字再现。

Rotating around one axis does not reorient the other axes, and you can end up in a situation where two axes cancel eachother out, making it look as if one of the rotation axes is \"broken\".

绕着一个轴旋转不能够再适应其它的轴，你可以在一个位置停止，在那里两个轴相互抵消掉了，那看起来就好像其中一个个轴断了一样。

Detect drive way too much space is a fixed power input shaft and output shaft rotation shaking, in the case of the transmission structure of conventional design and manufacture of machine tools, the transmission output shaft angle space at more than ten degrees to the dozens of degrees Transmission gap caused by too large spiral screw groove surface then there is obvious marks, thus affecting the machining accuracy of the screw.

检测驱动方式太多空间是一个固定的动力输入轴与输出轴旋转摇晃在常规情况下传动结构设计和制造的机床，传动输出轴角空间超过度到10度的数十个输电差距过大造成的螺旋槽螺旋面则有明显的标志，从而影响了螺丝加工精度。

A slip joint consists of outside splines on one shaft and matching internal splines on the mating hollow shaft,the splines cause the two shafts to rotate together but permit the two to move endwise with each other.

支路联合组成的一个外部样条轴和匹配的内部样条的交配空心轴，造成的样条的两个轴旋转在一起，但允许两个移动endwise彼此。

Substantially invariant sealing pressure between the stationary and rotating seal surfaces is achieved by individual hanging weights each connected by a flexible cable guided by a pulley wheel spindled to rotate in a fixed location, to pull the stationary seal into contact with the rotating seal.

密封压力大幅不变之间的固定和旋转密封面是由每一个人吊滑轮由1轮的指导下灵活的电缆，连接权取得的单轴旋转在一个固定位置，拉接触与旋转密封的静密封。

Through the intermediate gear Z12, the elevator shaft's gear Z13 and shaft are driven to turn, then via friction cone clutch or planetary mechanism the drum obtains six hoisting speeds.

a、冲击钻进：将变速箱右手柄板至&卷扬&位置，变速箱Ⅲ轴齿轮Z8与Ⅳ轴的齿轮Z10啮合，经中间齿轮Z12带动升降机轴上齿轮Z13及轴旋转，通过锥形摩擦离合器或游星轮机构使卷筒获得六种提升进度

Slender mandrel connect with the spindle flange、end,spindle can drive mandrel to turn,at this time feed truck move to the position of reservation,rolling paper up to mandrel.

细长芯轴与主轴法兰、尾台法兰连接起来，主轴可带动芯轴旋转，此时送纸车移到预定位置，将纸卷到芯轴上。

The long V block putted in the arch ribbed plate to limit two degrees of freedom in x axis and the z axes two degrees of freedom, the iron putted in the hole end limit to the degree of freedom which circle the y rotation of axis, the supporting block putted under the ribbed plate to limit degree of freedom along the y axis migration.

长V型块置于拱形肋板后限制x轴的两自由度和z轴的两自由度，挡铁置于孔端限制绕y轴旋转的自由度，支承块置于肋板下方限制沿y轴移动的自由度。

Consequences of the rotation of DNA are illustrated in Figure 9.17 in the twin domain model for transcription. As RNA polymerase pushes forward along the double helix, it generates positive supercoils ahead and leaves negative supercoils behind. For each

超螺旋与转录还有更多的关系，RNA聚合酶转录DNA时，解链和复链同时也发生，如同Fig113中所示，这需要整个转录复合体绕DNA旋转或者DNA自己绕它的双链轴旋转，DNA旋转的后果如Fig11.19所示，图中是一个转录的双结构域模型，当RNA聚合酶沿DNA前移时，在酶前产生正双螺旋，酶后为负的双螺旋；每一个双螺旋转角被RNA跨越后都会在前面产生+1转角，后面产生-1转角。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。