四边形的

Coupled with the quad seal retainer plate, this alignment assures progressive opening/closing flows, stable throttling, low friction operation and positive closure.

加上四边形密封护圈板，这种对齐定位确保逐级的启/闭流量，稳定的节流，低摩擦操作和积极的关闭。

In chapter four, the transmission mechanism of non-contact ultrasonic driving based on traveling wave with cylindrical vibrator is analyzed systematically.

并根据电路三相电路和三相负载的连接原理，推广到圆筒型非接触超声波驱动器的四相电路和四相负载的连接方法，提出了星形—星形接法和四边形—星形接法。

Finally, we discuss that the combination of conforming quadrilateral Q\ element and nonconforming quasi-Wilson element on anisotropic meshes. The error estimates of the energy norm and L~2-norm are obtained, which are the same as those of the traditional methods.

最后，本文研究了逼近空间取为协调的四边形Q_1元和非协调类Wilson元的情况，同样在剖分网格不满足正则性条件下，得到了与传统方法相同的能量模和L~2模误差估计。

By using the method of expanding the aperture function into a finite sum of complex Gaussian functions, approximate closed-form propagation equations of TMn0-Gaussian beams diffracted by hard-edged parallelogram aperture s are derived.

通过将硬边光阑函数展为复高斯函数之和的方法，在直角坐标系下研究了TMn0模高斯光束通过有平行四边形光阑的衍射，得到了近似的解析传输公式。

Applying this rule, we give a kind of definition of discrete Gauss curvature and mean curvature on the discrete parametric curves net.

应用这种加细方法，我们给出了一种针对由离散参数曲线网形成的四边形网格上任意顶点处的离散估计值的定义方法。

In this dissertation, the meshing techniques, especially for unstructured quadrilateral and hexahedral elements, are discussed, and the relative techniques, like the node smoothing and the reduction of matrix profile of a mesh, are also discussed.

本文全面回顾了四边形和六面体有限元网格特别是非结构网格生成技术，对相关的技术如网格节点位置平滑和带宽优化等技术进行了总结，并详细的描述了有关的算法。

A map projection in which quadrilaterals formed by meridians and parallels have an area on the map proportional to their area on the globe.

由子午线形成四边形并且把地球上的领域相应的投射在地图上形成的地图投影图。

The area of every triangle equals the area of the parallelogram .

每个三角形的面积等于拼成的平行四边形面积的。

This study tries to realize grade 6th students' understanding about quadrilaterals, through the interaction between the concept image and the concept definition.

本研究主要是利用概念心像和概念定义的互动历程来探究国小六年级学童对於四边形几何概念的了解情形。

In most of the modeling situations, the patches are defined over a topologically rectangular mesh.

大多数的造型系统曲面是通过四边形拓扑网格来定义的。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。