轴旋转

We studied that the transfer matrix ABCD theorem for the passage of paraxial rays or the optical system possessing a rotational symmetry axis can be generalized for the skew rays propagated off-axis, whether the optical system possessing rotational symmetry axis or not.

本文推广了几何光学近轴光线传输的ABCD定理，使之适用于远离光轴的空间光线的传输，无论光学系统是旋转对称的还是非旋转对称的。

The plastic deformation induced due to cyclic rotation of principal stress axes alone can be in the same magnitude as that due to shear with fixed principal stress axes. 2 The volumetric strain due to shearing of cyclic rotation of principal stress axes is found to be composed of a reversible dilatancy component and an irreversible dilatancy component. The former is characterized by its reversibility and is independent of past shear history, the latter by its irreversibility increases with the increase of cycle number yet its increase rate decreases with its accumulation. 3 The obvious non-coaxiality between directions of the principal stresses and principal strain increments is found and its degree depends largely on the change of shear stress component. 4 The intermediate principal stress has considerable effects on the deformation behavior of sands in the condition of cyclic rotation of principal stress axes. The accumulation rate of the irreversible dilatancy component increases with the increase of the intermediate principal stress parameter.

具有初始各向异性的砂土在纯应力主轴循环旋转排水条件下的主要变形规律为：①纯应力主轴循环旋转可产生与应力主轴固定单调剪切处于同一数量级的塑性变形；②纯应力主轴循环旋转引起的剪切体变包含可逆性剪切体变分量和不可逆性剪切体变分量两部分，其中可逆性剪切体变分量在一周内可完全恢复，基本与应力历史无关；不可逆性剪切体变分量随循环周数的增加呈单调增加，且增加速率随其自身累积值的增大呈减小趋势；③应变增量主轴与应力主轴之间的非共轴现象显著，且在一周内具有分段性；④中主应力对应力主轴循环旋转条件下砂土的变形特性有重要影响，不可逆性剪切体变分量的累积速率随中主应力系数的增加而增加。

A test model of four co-rotating disks was developed as the simplified version of a typical internal cooling system of a gas turbine compressor. The investigation was on the distribution of local heat transfer coefficient and the averaged nusselt number of the downstream main disk. Experimental analysis may lead to following conclusions: the distribution is not of monotony and multi-peaks were found along the disk surface,Nu increases with the decrease of the rotational reynold number Re(subscript w,Nu increases with the axial reynold number and the grasholf number.

针对航空发动机多级压气机盘腔的冷却问题，对具有轴向通流的三腔模型进行了系统的研究，通过对局部换热特性与平均换热特性的分析，可以表征旋转盘的热应力水平和相对冷却效果，结果表明表征旋转盘热应力水平的局部换热特性在旋转盘的半径上呈多峰分布，表征相对冷却效果的平均换热特性与旋转雷诺数Re、进气雷诺数Re以及格拉晓夫数Gr有关，当Re及Gr增加时，平均努塞尔数Nu随之增加，而Re的增加使之减小。

If you have a spinning gyroscope and you try to rotate its spin axis, the gyroscope will instead try to rotate about an axis at right angles to your force axis; this is precession.

如果您有纺纱陀螺仪和您尝试旋转，其旋转轴，陀螺反而会尝试旋转约一轴成直角，以您的力量轴；这是岁差。

A method is also provided for reducing axial space within a dual-input clutch transmission having a torque converter, including providing an on-axis transmission pump with a housing and rotor set, providing a torque converter with a rotatable hub which is drivingly connected to the rotor set for powering of the transmission pump, and mounting the dual-input clutch to the pump housing for support.

还提供一种方法以减少带变矩器的双输入离合器变速器的轴向空间，包括提供带有壳体和转子组的同轴变速器泵，提供带有可旋转毂的变矩器，所述可旋转毂以驱动的方式连接到转子组以为变速器泵提供动力，并且将双输入离合器安装到泵壳体上以支撑。

Methods: 28 patients with isolated patellofemoral complications after total knee arthroplasty were scaned by computed tomography. The epicondylar axis and tibial tubercle were used as references to measure rotational alignment of the femoral and tibial components.

28例施行人工全膝关节置换术后出现单纯髌股关节并发症的患者进行膝关节轴位CT扫描，选择股骨髁上轴和胫骨结节作为CT扫描的参考标志来测量股骨假体和胫骨假体的旋转角度，分析旋转稳定性与髌股关节并发症的相关性。

The image forming device also includes a pressing body which is provided on the main frame and is slidable in a direction along a straight line orthogonal to a rotational center shaft of the electrostatic latent image carrier and a rotational center shaft of the developer carrier, and an operating unit which operates the pressing body to press a bottom surface of the developing unit by sliding the pressing body in a direction of the straight line and to hold the pressing body so that the developer carrier is maintained under a state making contact with the electrostatic latent image carrier.

该成像设备还包括：一个按压机构，该机构设置在该主框架上，并在按压方向上沿着这样直线的方向滑动，其中该直线垂直于静电潜象载体的旋转中心轴和显影剂载体的旋转中心轴；以及一个操作装置，该操作装置通过在直线的方向上滑动该按压主体以按压显影单元的底面，并保持该按压主体，从而该显影剂载体保持在与静电潜象载体接触的状态。

Therefore, for improving the accuracy of exceed slender axle on turning,must need to do with the lathe fixture and cutting tool for further improvement. In order to reached the requirements of precision machining,in machining process must use follower rest、flexible active thimble、space block and bracket etc fixture and assistive device.

超细长轴在车削加工中承受自身重力、切削力、高速旋转产生的离心力的作用，极容易出现振动与弯曲变形现象，增大轴的几何形状误差，而超细长轴的轴向尺寸较大，直径较小，热扩散性及刚性差，受切削热作用会在轴向发生线性膨胀，若在轴向的伸长量无法得到消除，轴将受迫弯曲，从而影响轴的精度。

The apparatus for assembling a door and a main body in a microwave oven includes a hinge plate mounted in a main body of a microwave oven, a hinge shaft mounted in a cut-open portion of a choke cover fixed to a door, for being rotatably fixed to the hinge plate, and a detachment prevention portion elastically deformed to allow the hinge plate to be fixed to the hinge shaft and restored to the original state if the hinge plate is completed to be fixed to the hinge shaft to prevent the hinge plate from being detached from the hinge shaft.

包括一个安装在微波炉主体上的铰链板，一个安装在阻波盖的切开部分的铰链轴，其阻波盖固定在门上，该铰链轴可旋转地固定在铰链板上，和一个可拆防护件，它可进行弹性变形以允许将铰链板固定在铰链轴上并且在铰链板完全被固定在铰链轴上后，恢复到原始状态，以防止铰链板从铰链轴中脱开。

In addition, the apparatus includes a motor for rotating the shaft to move the dressing stone held by the fixture along an arc centered on the longitudinal axis of the shaft into engagement with the cutting surfaces of the saw when the saw is rotating thereby to remove deposits from the cutting surfaces of the saw.

另外，该设备包括一个马达（18），在锯旋转时，该马达（18）使轴（14）旋转，并沿着一圆弧将由固定器（16）支撑的清理石移动到与锯的切割面接触的位置，上述圆弧以轴（14）的纵向轴线为中心，这样去除在锯切割面上的沉积物。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。