椭圆曲面

The author not only presents pseudo sphere, ellipsoid ,conoid,uniported hyperboloid,elliptic biparted hyperboloid,paraboloid and hyperbolic paraboloid of the second elemental form,but also curve of the second elemental form.

不但给以了伪球面、椭圆面、劈锥曲面、单叶双曲面、双叶双曲面、椭圆抛物面及双曲抛物面的第二基本形式，而且给以了一般曲面的第二基本形式。

In the lastchapter of this paper,we studied the elliptic surfaces and the Donaldson seriessimply.

本文的最后一章我们简单地讨论了椭圆曲面和Donaldson级数。

Concave design showed better stress performances than convex design both on values and distributions. Rotational freedom was confined by elliptic geometry and resulted in 61.36 MPa von Mises stress, which was larger than the other motions except flexion.

在椭圆曲面设计的分析方面，因其几何外型的限制，在旋转动做下发生了相当高的von Mises应力(61.36MPa)，仅次於该设计於前弯动作下时之值。

Further study will aim on the effect of geometry (long/short axes ratio) and motion patterns on elliptic design.

后续研究将针对椭圆曲面之长短轴设计及其运动型态进行分析。

In the case of kod≥0,we prove that s≥6,and construct a series of examples of s=6,where S is rational surface,elliptic ruled surface,Abel surface,K3 surface,Enriques surface,biellipticsurface respectively.

当〓时，证明了〓。并且找出了s=6的一系列例子，曲面类型分别为有理曲面，椭圆直纹面，Abel曲面，K3曲面，Enriques曲面，双椭圆曲面。

The hoisting technique with button pole group was applied smoothly for installing the latticed shell with elliptic surface at Yuncheng Agriculture Exhibition Center.

运城市农业会展中心椭圆曲面网壳结构安装，采用了以拔杆集群为主的吊装方法，保证了工程的顺利完工。

This paper de-duces the equation of scroll case surface with the enveloping theory,builds the envelope sur-face of ellipsoides with variable radius by using the the method of constructing an ellipse withseveral arcs and presents a new and simple method fOr geometry moulding of scroll case sur-face.

蜗壳是水电站的重要部件之一，本文以包络理论推导了蜗壳曲面方程；并采用分段圆弧构造椭圆的方法构造了变径椭球包络曲面，为蜗壳曲面的几何造型提出了一种新的简便方法。

Turn to the top view, use left and right symmetry line to draw tangent plane curve. Open drive surface order board, choose triple rail, the single tangent plane, and the tangent plane width measurement, to create the oval curved surface.

转到上视图，使用左右对称线绘制切面曲线，打开导轨曲面命令面板，选择三导轨，单切面，宽度切面量度，建立椭圆曲面。

In addition to measure the refractive index profile of a GRIN lens, we also measure the refractive profile and radius curvature of a Plano-convex lens by means of this imaging ellipsometric technique.

本文将此简式影像式椭圆偏光术应用在非均匀平面材料光学参数之量测，及平凸透镜之量测；我们不但量出了渐变式光纤折射率的径向分布并证明其表面的平整度，另外也量出平凸透镜的曲率半径及折射率。此法可将椭圆偏光术延伸到曲面薄膜量测。

Main products handle the ball, handle sets, has a long handle sets, handle rod, oval handles, rotating handle, surface rotating handles, small rotating handle, can handle security pack, tight set of adjustable handles, small ripple hand wheel, small hand wheel, Chrome hand wheel, milling machine hand wheel, a round flange hand wheel, back corrugated hand wheel, the corrugated hand wheel, double the rate of the hand wheel, double-handle hand wheel, disc hand wheel, hands, hands Cross, Star handle, embossed handle, the handle of bellows, Wu Jiaoxing-shaped handles, butterfly handle, 1.30 Arrow hands, T-shaped handle, an oval handle, the bow handle, a square handle, shake handles, adjustable plastic cooling pipe, cylinder Rubber shields, TL-1-engineering plastics Tuolian.

主要产品有手柄球、手柄套、长手柄套、手柄杆、椭圆手柄、转动手柄、曲面转动手柄、小转动手柄、可折安全手柄、可调位紧定手柄、小波纹手轮、小手轮、镀铬手轮、铣床手轮、圆轮缘手轮、背波纹手轮、内波纹手轮、双幅条手轮、双柄手轮、碟形手轮、把手、十字把手、星形把手、压花把手、外波纹把手、五角星形把手、蝶形把手、三角箭形把手、T形拉手、椭圆拉手、弓形拉手、方形拉手、摇动手柄、可调塑料冷却管、圆筒橡胶防护罩、TL-1型工程塑料拖链。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。