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圆和

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Finally it analyzes the feasibility that using hydromechanics to analyze traffic flow by contrasting various characters between traffic flow and fluid flow. It analyzes influence of road alignment to basic expressway segment capacity by hydromechanics, and obtains viscous resistance and viscous movement differential equation when the vehicle drives on circular curve segment of expressway. And it infers that viscous resistance is correlated with sideway force coefficient, slope of crown and radius of circular curve. Radius of circular curve, sideway force coefficient and slope of crown are bigger, viscous resistance is smaller, the influence to capacity is smaller when the vehicle is running on nearside lane of circular curve; but radius of circular curve and sideway force coefficient are bigger, slope of crown is smaller, viscous resistance is smaller, the influence to capacity is smaller when the vehicle is running on fast lane of circular curve.

最后通过对比交通流与流体流的相似性,运用流体力学分析了道路线形对快速路基本路段通行能力的影响,求出了车辆在曲线路段的粘性阻力,建立了车辆在曲线路段的粘性运动微分方程,并由此推知,粘性阻力与横向力系数、路拱横坡度和圆曲线半径都有关系,当车辆在圆曲线外侧车道上行驶时,圆曲线半径、横向力系数和路拱横坡度越大,粘性阻力就越小,对道路的通行能力影响就越小;而当车辆在圆曲线内侧车道上行驶时,圆曲线半径和横向力系数越大,路拱横坡度越小,粘性阻力就越小,对道路的通行能力影响就越小。

The first one is to generate the circle for each borderline segment of the component by considering the segment length and the prescribed tolerance value. If this is not the case, the borderline segment will be equally divided into halves until the obtained circle satisfies the tolerance value over the whole borderlines of the component. The basic idea of the last two algorithms aims at covering the domain occupied by the component as much as possible. The circle generation is carried out sequentially from salient angle to the sector formed by the salient angle till the uncovered borderline segments of the component. Particularly, the three-step algorithm with gap allows that the generated circles are distributed with gap along the component contour.

二分法利用组件各边长度和设置的容差大小得到该边的候选包络圆,若该圆不满足组件所有边的容差要求,则将该边不断地对分,直至所得到的包络圆满足各边的容差要求;三步划分法和带间隙的改进三步划分法则以组件区域为划分对象,依次对组件多边形凸顶角、凸扇形区和多边形各边剩余线段划分包络圆,且带间隙的改进三步划分法则允许包络圆在组件边界上以适当的间隙分布。

The outstanding nomenclatural problems in the Palaeozoic arborescent lycopsid Cyclostigma are discussed,which include four aspects:1valid publication and author citation of Cyclostigma;2synonym,homonym,and replacement name of Cyclostigma;3conservation of Cyclostigma;and 4typification of Cyclostigma.

文章讨论晚古生代木本石松植物圆印木属Cyclostigma命名中存在的突出问题,包括4个方面:1圆印木属的合格发表和作者引证;2圆印木属的异名、同名和替代名;3圆印木属的保留;4圆印木属的模式。

In order to obtain better characteristics of photonic crystal lasers, the wafer bonding technology is introduced to integrate MQWs wafer with different uncompatible wafers. We utilize the direct bonding method and glue bonding method to integrate the 1550nm long-wavelength MQWs with DBR wafer or sapphire. The effect factors of bonding process and choice of bonding materials are discussed. At last, we measure the photoluminescence spectra of our membrane devices and bonding samples.

为了得到更好的光谱特性,我们介绍了各种晶圆接合技术去整合含有多层量子井结构的晶圆与其不相容的材料,我们利用直接接合和溶胶接合的方法去接合1550nm长波长的多层量子井晶圆与含有DBR结构的晶圆或sapphire,并对於各种接合影响因素与材料的选择加以讨论,最后再对我们的层状光子晶体雷射和晶圆接合后的样本做量测。

The disc type counter current chromatographic separation column comprises at least a or a plurality of discs provided with designing slots, clapboards at two sides of each disc, the cylinder rotating axis, an upper flange and a lower flange; the cylinder rotating axis is hollow and passes through the center of the upper flange, the lower flange, the discs and the clapboards; the inner edge and the outer edge of the upper flange, the lower flange, the discs and the clapboards are provided with a plurality of bolt pieces that fix the upper flange, the lower flange, the discs and the clapboards together.

一种多功能高效逆流色谱仪,它由盘式逆流色谱分离柱、配重体、行星架、柱体自转轴、行星轮、中心轮、中心公转轴、电机、传动装置、速度控制装置和保温机箱组成;所述的盘式逆流色谱分离柱,它包括有至少一个或多个设槽的圆盘、每个圆盘两侧的隔板、柱体自转轴和上法兰、下法兰;所述的柱体自转轴为空心,贯穿在上法兰、下法兰、圆盘及隔板的中心;在上法兰、下法兰、圆盘及隔板的内外边缘设有多个螺栓部件,将上、下法兰、圆盘及隔板固定在一起。

It's 15 hours, universal time,here is the news from the voice of american ,i'm david deforest from the VOA news center in washington.governments around the world are moving to boost the banks was more tie billion dollar beyer today.they are trying to get banks to rezoom london.and restore the stock and credit market that thread the push the world into a recession.but consider the government action we should many ,but not at all , that dasters.key stock markets in hongkong ,britain,germany and united stated gained between 4 and 10percents , a huge reversal from major loses suffers over the last week, but the key market in moxico dropped so sharply the trading was suspended.the british government has a anouncement it is partial renationalization three british banks with up to six billion dollars of taxpayer's money.president minister golden brown promises the unpresident bayer loud is it important step in foring out the frozen money market.from VOA time ravers has reported from london.you gonna both move the money again the british government wanna thirsty four billion dallors was the capital and into the royal bank scotland just less than thirty billion into loyal's tsben ach box.dunst tution is curtely really go shading emerge terms .prime minister golden brown says the stand by is do nothing with never anoption.the extrodinary retimes was financial martket seems to work .the government canos just made people ont the owe to be bufit about.

现在是格林尼治时间下午三点整,这是美国之音新闻节目。我是华盛顿新闻中心的大卫。世界各地政府今天正在积极给予银行几十亿美圆的紧急援助。他们试图让银行重新带领和开始已经停止的信贷时常,担心世界经济进入衰退。政府的协调动作鼓舞了许多企业,但并不是所有的投资者。在香港,英国,法国,德国和美国的重要股票都上升了4到10个百分点,自过去一个星期的损失中一次巨大的倒转。但是莫斯科的一个重要指数在停盘时积聚下滑。英国政府已经声明,三家部分国有化银行拥有纳税人630亿美圆。首相GB保证这次的前所未有的紧急援助对于金融市场的解冻十分重要。TOM在伦敦发回报道。又一次大胆行动以恢复金融市场,英国政府将注340亿美圆的资金在苏格兰皇家银行和只不到300亿美圆在Lloyds-TBS和HBOS,这两所机构现在正在重新谈判合作项目。首相GB说站在一边什么事不做永远不是一个选择。在现在特殊的时刻,金融时常停止工作,政府不能让人民将自己的利益推来推去。

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 paper discusses the position relationship between the litter circles of torus and the section circle of sphere figured out the intersection of torus and sphere when the central axis of torus and sphere center in XOZ coordinate plane through coordinate transformation.

利用坐标变换使圆环中心轴与球心同在XOZ平面内,讨论了在该平面内圆环截圆与球圆的位置不相交、相切和相交时圆环面和球面的相交情况,并给出了判别圆环面、球面相交情况的流程图以及圆环面和球面相交实例。

To overcome the drawbacks in the weight and cost of the antenna with the corrugated soft surface, a new patch antenna with patch rings is designed. Its weight is about 1/4 less than the antenna with the corrugated soft surface and it is inexpensive. Good experimental results are obtained. The radiation pattern of the antenna is more rotationally symmetric, and a more reduction on the sidelobe levels of the antenna is achieved as compared to the antenna with the corrugated soft surface. In conclusion, in the present thesis both theoretical and experimental research works have been carried out intensively on patch antennas based on photonic-bandgap structures.

为了克服皱褶软表面天线份量重,加工费用贵等缺点,我们对空气介质的皱褶圆环结构软表面天线进行了改进,将周期分布的皱褶圆环平面化,并保持结构的软表面特性,设计出了一种新的平面圆环结构的软表面天线并进行了实验研究,加工的平面圆环结构天线比皱褶圆环结构天线重量减轻了约1/4,加工费用大大降低,所取得的实验结果显示,该平面圆环结构软表面天线的方向图的轴对称性得到了改善,在俯仰角从0°~-90°的范围内天线H面的波束与E面重合,与皱褶圆环结构相比,天线的旁瓣和背瓣受到了更大的抑制,E面方向图上+120°方向的旁瓣被明显削弱。

Sothe half space problems and the composite material problemwhich has an inside straight boundary will be changed to thescattering problems which involve two circular cavities、acircular cavity and a circular lining as well as a circularcavity and a circular elastic inclusion to the incident steadyplanar P-waves respectively.

具体做法是利用一个半径很大的圆孔和一个半径很大的圆形弹性夹杂来分别代替半空间的直边界和双质复合材料中的内部直边界,将原来的半空间问题和带内部直边界的复合材料问题各自转化成无限大空间中两个圆孔、一个圆孔和一个衬砌以及一个圆孔和一个圆形弹性夹杂对稳态P波的共同散射问题。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

Closes the eye, the deep breathing, all no longer are the dreams as if......

关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。