圆和

If c is the largest slope of the tangents from the point to the circle , find the value of c.

6 图三 Figure 3 现有点和圆。如果c是通过点与圆相切直线的最大

Corporation has been the introduction of side foam, round bubble of a full set of assembly line equipment, and is equipped with a square bubble, round vesicles, profiling cutting machine and embossing equipment, but also purchased imported glue machine, cold plastic composite machine, flame machine, polyurethane composite, etc. more than 10 Units composite devices, in order to strengthen support, the company developed its own production of composite glue, and relying on advanced equipment and sophisticated technology, is committed to high-quality development.

公司先后引进方泡、圆泡流水线的全套设备，并配备了方泡、圆泡、仿形切割机及压花设备，同时还购入了进口胶粘机、冷胶复合机、火焰机、聚氨酯复合机等10多台复合设备，为加强配套，公司自己研制生产复合胶水，并依托于先进的设备和成熟的技术，致力于高品质的发展。

Using experimental method, the effects of different laser energy, different shock times and shock paths on TA2 round sheet forming were analyzed by the aid of a neodymium glass laser with pulse energy 35J, FWHM 23ns, laser wavelength 1.06 μm, effective spot diameter 8mm, pulse repetitious rate 2Hz.

采用实验的方法，研究了不同的激光能量和不同的冲击路径、冲击次数对TA2钛合金圆板变形的影响，取得了不同冲击条件下钛合金圆板的变形数据。

Regarding four phase-stepping method, the difference of new instrument is that the original instrument requires four quarter-wave plates and needs to set up eight different angular magnitudes, whereas the new one requires only one quarter wave plate and changes the angle of analyzers.

在三场架设中，有别於一般需四道光路和输出时的四分之一波板，并且只要调整检偏器之角度便可得到三张的包裹相位图；而四场架设里，也只需多一片输出时的四分之一波板，使其中两道光路的结果为圆偏光，此外，仍然只转动检偏器之角度即可，相较传统的四场，除了元件的简化外，角度设定也较简单容易；六场平偏则改善了一般平偏或圆偏只能单一取得主应力角或因四分之ㄧ波板所造成的影响。

There was a revival of ancient Roman forms , including the column and round arch, the tunnel vault, and the dome.

复兴古罗马的形式，包括廊柱和圆拱，地道的拱顶以及圆屋顶。

Square face try: round and oval style frames with sides set at the top of the frame.

方形脸 尝试：圆框和随圆框造型，镜片靠镜框上沿儿固定。

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。

First, according to the parts of materials processing operations, cutting tools and other relevant factors and choose the outline of the handle and part characteristics identify nine tools were cylindrical rough turning, cylindrical precision turning, external grooving cutter , internal thread cutter, Boring tool within the inner notch cutter, 93 ° left side knife, 93 ° right-side knife.

第一，根据本零件材料的加工工序、切削用量以及其他相关因素选用刀具及刀柄和零件的轮廓特点确定需要9把刀具分别为外圆粗车刀、外圆精车刀、外切槽刀、内螺纹刀、内镗孔刀、内切槽刀、93°左偏刀、93°右偏刀。

The camber near the switch point changes rather slowly, while it changesrapidly at certain distance range from switch rail.

建议尖轨轨头非工作边的刨切曲线采用缓和曲线和圆曲线的组合线型，在尖轨理论尖端至圆曲线之间，为一曲率渐变的缓和曲线，在尖轨尖端附近矢度变化较慢，而在距尖轨一定范围时，矢度变化较快。

Following the theory of slip line field , the area is divided into five sections and the distributing situation of the slip line in each section is analysed.

通过对方盒形件塑性变形过程的分析及变形区域内的变形应力分析，采用滑移线场理论的分析方法，把变形区划分为Ⅰ～Ⅴ区域并分析了这些区域的滑移线分布情况，导出了对数螺线的基圆半径和基圆中心位置及力学模型，为方盒形件的毛坯尺寸的确定提供了依据。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。