变圆

ABSTRACT Based on theoretical analysis of axial compression of ring-shape specimen between two flat dies by an upper-bound technique,it is possible to carry out the measurement of both the friction coefficient of lubricant and the basic flow stress of the ring material under particular temperature and strain rate.

摘 要 根据圆环压缩的连续速度场上限定理的理论分析，通过圆环试样压缩前后的几何尺寸的变化，能测量润滑剂的摩擦因数和圆环材料的流变应力。

Under the round icon state, move the cursor to the position of centre of a circle (according to the position value of the cursor, or the cursor is reached and turned into ' X ' shape while appointing one), can't show, move the cursor at the same time, will reveal the present and round radius in the parameter window springing, will draw the corresponding round (when far away from the centre of a circle in cursoring on the screen, the radius becomes large; When the cursor is close to the centre of a circle, the radius is diminished).

有关机械方面的翻译，谁会，帮我翻译一句8.3.3.1圆输入 A ：标定圆在圆图标状态下，将光标移至圆心位置（根据光标位置值，或光标到达指定点时变成'X'形），不能放，同时移动光标，在弹出的参数窗内将显示当前圆的半径，屏幕上绘出对应的圆（当光标远离圆心时，半径变大；当光标靠近圆心时，半径变小）。

The behavior and performance of the MR valve with both annular and radial damping gaps is expressed in terms of non-dimensional parameters and the efficiency of the MR hydraulic actuator system with the MR valves with both annular and radial damping gaps in Wheatstone bridge network is studied

同时推导了基于平板模型的同时具有圆环和圆盘阻尼间隙的磁流变阀的非量纲的体积流量，得到了桥式连接的磁流变阀工作时驱动泵效率的计算模型。

Results Using different concentrations of 5fluorouracil to deal with A549 cells, with the increase in drug concentration and treatment time,cell survival rate decreased significantly;and low concentration of 5fluorouracil induced the cell spread and increased vacuolization within the cytoplasm, acridine orange staining showed an increase in acidic vesicles,high concentration made the cell round and cell apoptosis.

结果不同浓度的5氟尿嘧啶处理A549细胞，随着药物浓度的增加和处理时间的延长，细胞存活率明显下降；且低浓度使细胞呈铺展状态，细胞质内空泡增多，吖啶橙染色显示酸性膜泡增多，高浓度使细胞变圆，出现凋亡状态。

Results:We used different concentration of NDGA to dispose cancer cell independently.Accompanying the rise in drug's concentration,apoptosis rate of cells rose gradually,morphologic of cells became round,the volume became small and they abscised from the inner surface of the bottle.apoptotic body could be found through scanning electron microscope.

结果：不同浓度NDGA处理HT29结肠癌细胞，随着药物浓度加大，细胞形态变圆，体积缩小，从瓶壁上逐步脱落，肿瘤细胞凋亡率逐步上升，癌细胞阻滞于G0／G1期。

The cells survival rates of every group were determined by MTT technique.Results The tumor cells without any anti-glioma factor treatment were growing better and no change was observed in morphology.After 2-3 days,cell axons disappeared,cell bodies crimpled,nucleoli crinkled and cracked in each treated group.

结果 未加任何抗癌因子处理的C6细胞组肿瘤细胞生长旺盛，细胞形态无明显改变；各处理组的肿瘤细胞2～3天后开始逐渐出现细胞突触消失，细胞变圆，胞体皱缩，核仁固缩、裂解、甚至消失，继而逐渐死亡。

Cdc42 and Rac1 have similar effects on cytoskeleton. They both promote the actin polymerization in the cell and profit the formation of filopodia and lamelipodia respectively.

Cdc42和Rac促进细胞内肌动蛋白聚合，分别有利于丝状伪足和片状伪足的形成；而RhoA可能具有与Cdc42 和Rac相反的效果，通常造成细胞边缘和突起的收缩及胞体变圆。

The result showed that LPS inhibited the proliferation of pulp cells when its concentration was 100μg /ml; it could induce the apotosis of the cell when in 250μg /ml and it could lead the pulp cell to die when in 450 μg/ml.

g／ml浓度的LPS可抑制细胞生长，使细胞体积缩小；200μg／ml浓度的LPS可使个别细胞收缩变圆，发生类似凋亡样改变；而400μg／ml浓度的LPS可使细胞肿大、破碎发生坏死样改变。

It is worth to be noted that the needed driving current to the MR valve with both annular and radial damping gaps is less than that to the MR valve with annular damping gaps under the cut-off state of the MR valves, which show that the MR valve with both annular and radial damping gaps consumes less energy.

测试结果显示：（1）在相同的工作条件下，同时具有圆环和圆盘阻尼间隙的磁流变阀产生的压降更明显；（2）处于截止状态时，同时具有圆环和圆盘阻尼间隙的磁流变阀的激励电流明显小于具有圆环阻尼间隙的磁流变阀的激励电流，因此采用同时具有圆环和圆盘阻尼间隙的磁流变阀可以节约能量的消耗。

The article presents the developing condition of PWM and SVPWM first.Then the theory of SVPWM is discussed in detail.The SVPWM is based on the thought of magnetic chain tracking.It makes the ideal magnetic chain circle of three-phased sysmmetry electric motor supplied by three-phased sysmmetry sine wave voltage for basis,uses the practical magnetic chain vector formed by the different switch modes of three-phased inverter to track the basic magnetic chain circle.During the course of tracking,the inverter changes the switch modes properly to form the PWM waves.Then the modulation wave of SVPWM is analyzed in detail.The modulation wave of SVPWM is implicit,but the analogous modulation wave in A-B-C axis needs to be calculated in order to expose the internal relation of SVPWM and SPWM.That is to show the implicit modulation wave of SVPWM. SVPWM actually is a transformed SPWM ruly sampled by the modulation wave which is injected by the zero prefaces based on space vectors.

本文首先对脉宽调制技术的发展现状进行了综述，在此基础上分析了电压空间矢量脉宽调制技术的发展现状；接着对空间电压矢量脉宽调制技术的基本原理进行了详细的分析和推导，SVPWM是基于磁链追踪的思想，它以三相对称正弦波电压供电下三相对称电动机定子理想磁链圆为基准，由三相逆变器不同开关模式下所形成的实际磁链矢量来追踪基准磁链圆的，在追踪的过程中，逆变器的开关模式作适当的切换，从而形成PWM波；然后详细分析了电压空间矢量脉宽调制技术的调制波，虽然SVPWM法的调制波是隐含的，但是为了揭示SVPWM法与SPWM法的内在联系，需要求出SVPWM在A-B-C坐标系上的等效调制波，也就是将SVPWM的隐含调制波显化；SVPWM实质是一种基于空间矢量在三相正弦波中注入了零序分量的调制波进行规则采样的一种变形SPWM。

I think he's learned how to approach hitters....

Johhny Damon说，『他已是最好的了，再没有人能够比他做的更好，我想他的球技已经完全成熟了，而且他也已经学会了如何去对付和压迫各种打击者。。。。。。

In effect, an 18 foot King Cobra could actually look down onto the average human being.

际上，一个18尺眼镜蛇王其实可以俯视到的平均人。