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The method of setting up an affine coordinates system to solve the problems for the spatial crank and rocker mechanism is proposed.

分析并回顾了在给定摇杆两个极限位置及行程速度变化系数的情况下,最小传动角为最大的平面曲柄摇杆机构和空间曲柄摇杆机构的设计问题。

In order to solvepiecewise algebraic varieties, we propose a new method to compute an algebraic varietyon a convex polyhedron by adding hyperplanes with the method of Groebner bases. Thus,the algebraic variety on the convex polyhedron is transformed to the positive solutionsof a system of polynomials. Besides, the minimal decomposition is also obtained.

通过添加超平面技巧将Groebner基方法应用到凸多面体内任意维代数簇的计算上,从而把凸多面体内的代数簇转化为另外一组多项式方程组的正解,并且得到了该代数簇在凸多面体内的极小分解。

By direct numerical simulation of Navier-Stokes equations we investigate the three-dimensional evolution of a mixing layer, the three-dimensional merger of two parallel vortex tubes and reconnection of two antiparallel vortex tubes in the thesis.

本文用拟谱方法求解Navier-Stokes方程,对小扰动下平面混合层随时间的演化、同向平行涡管的三维合并和反向平行涡管的重联进行了直接数值模拟。

Planar Archimedean antenna has some advantages as wideband,small volume and good performance in circularly polarizing ,so it has broad appliance prosperity.

平面螺旋宽带天线具有频带较宽、体积较小、圆极化性能较好等特点,应用范围很广。

Autocollimator is a kind of instrument for precise angle measuring, it is predominant in the field of multidimensional and non-contact measurement of tiny angle. It works with the principle of autocollimating and been used in a lot of fields, such as linearity and flatness of precise flat.

中文摘要自准直仪是一种精密角度测量仪器,在实现小角度的多维、非接触测量中具有独特的优点,它利用光学自准直成像的原理来实现在一定范围内测量物体的角度变化量,被广泛应用于导轨平台的直线度、精密平台的平面度等测量领域。

Through finding the bisector s of neighboring boundary elements, points of intersection of neighboring bisector s are obtained.

通过求解相邻边界元素的平分线,计算出相邻平分线的交点,由距离最小的平分线交点实现 Voronoi图边的增长,最终建立完整的平面单连通域的 Voronoi图。

For a given image block, an optimal plane is found under the min-imum square error criteria, and the pixels of the block are approximated by the corresponding points on the plane.

在最小二乘方准则下,对于给定的图像子块,找到一个最佳平面,并用其上的点逼近图像的像点。

Least square method finds out the best coplanar pad combination using least square arithmetic, which provides the dip angle and azimuth.

最小二乘法使用最小二乘原理找出最优共面电极臂组合,利用这个最优组合确定的平面来计算地层倾角与倾向。

Surface relief caused by the formation of lower bainite in an Fe-C-Si-Mn alloy has been investigated by STM. It was discovered that the subunit which is the lowest structural unit observed by TEM is actually made up of sub-subunits. The surface relief due to the formation of sub-subunit is tent-shaped, and of a non-IPS type, which indicates that the sub-subunit cannot be formed by shear. The height of relief is 60-140nm, and the maximum shape deformation is ca.

用扫描隧道显微镜对Fe-C-Si-Mn合金中的下贝氏体浮突进行了观察研究发现用透射显微镜观察到的最小结构单元——亚单元是由更小的超亚单元组成的超亚单元的浮突为&帐篷&型,而非不变平面应变型,表明它不是切变形成;超亚单元的浮突高度为60-140nm,最大形状变型量约为0.23。

Chinese in Taiwan were characteristically different from Japanese by having a smaller interincisal angle, lower frontal facial height, mandibular angle and mandibular plane angle.

3在台湾中国人与日本人不同之处在於在台湾中国人上下门牙间角较小,前下颜面高,下颚角、下颚下缘平面角较小。

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However, as the name(read-only memory)implies, CD disks cannot be written onorchanged in any way.

然而,正如其名字所指出的那样,CD盘不能写,也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口,替代木托盘,免薰蒸,符合欧盟、北美各国对出口货物包装材料的法令要求;喷涂钢托盘适用于重载上货架之用,托盘表面根据需要制作成平板状、波纹状及间隔形式,满足不同的使用要求。

A single payment file can be uploaded from an ERP system to effect all pan-China RMB payments and overseas payments in all currencies.

付款指令文件可从您的 ERP 系统上传到我们的电子银行系统来只是国内及对海外各种币种付款。