球面

In 1968,J.simons got the integral formulaof the minimal submanifolds of unit sphere S~(1).After that time,many geometrician had got lots of results on the pinching problem of submanifolds.

自从1968年J.Simons给出球面S~(1)中极小子流形的积分公式后，几何学家对子流形的pinching问题研究的很多。

A steering shaft, a steering column, a steering gear housing with side and lower covers, a globoid worm, a pitman shaft with a triple roller, an bearing and a pitman shaft adjusting screw .

操纵机构由方向盘、驾驶杆、带有侧盖和下盖的转向器壳、球面蜗杆、带有三重滚轴连杆轴、轴承和调节转动的连接杆轴组成。

A golf ball on average is a perfect sphere, but it does not fly like one.

一颗高尔夫球就平均而言是个完美球面，但是它飞起来的时候就不是这麽回事了。

The author points out that the combination of horizontal observable should be used in the form of the complex number in the study of gravity field through an inspection of the principles of torsion balance and rotational gradiometer and the discussion of the acquisition of height anomaly from vertical deflections according to Molodensky's, as well as the fact that some combination of horizontal gradient components are orthogonal functions on a spherical surface.

通过对扭秤、旋转梯度仪工作原理的考察和 Molodensky 关于垂线偏差推求高程异常的论述以及目前业已发现水平梯度分量的某种组合是球面正交函数系的事实，作者明确指出，在地球重力场的研究中，水平方向观测量的组合应作为复数使用。

At the end the test of ground gravity solution from simulated satellite data and down continuation of airborne gravimetry are conducted.

提出并建立了球面小波正则化方法，建立了不适定问题的渐近逼近解，利用这种方法进行了模拟卫星数据反解地面重力位试验以及航空重力测量数据向下延拓试验。

The spherical grinder is different to normal ones. It has advanced technology.

球面磨削与普通的平面磨削有着很大的区别，有着较高的技术要求。

Variety including gulley ball bearing, cylindrical roller bearing, spherical surface roller bearings, circular cone roller bearings, angle contact ball bearing, needle bearing and other many kinds of types.

品种包括深沟球轴承、圆柱滚子轴承、球面滚子轴承、圆锥滚子轴承、角接触球轴承、滚针轴承及其它多种类型。

In this paper, the analysis model of crustal vertical movement is established based on the hypothesis of the global flux isostatic datum, and its harmonic function series solution is proposed.

根据全球通量均衡假说建立了地壳垂直形变场的分析模型，在球面近似下求得了该模型的球谐函数级数解并拟合了两个不同区域的地壳垂直形变场，编绘了等值线图，继而在密切平面坐标系下导出了该模型的Fourier级数解。

In this paper,a numerical computing principle of spherical harmonic synthesis and analysis is introduced,and its inherent parallelizability is studied.

1引言球谐分析是将各种全球数据转化成球谐系数的过程，而球谐合成则是其逆过程，它根据一系列球谐系数计算球面上的函数值。

Simulation result shows that a solar furnace using an 8m×8m non-imaging focusing heliostat with 289 mirrors coupled with a spherical concentrator with 0.7m aperture and 27cm focal length is capable of achieving flux concentration of 25,000 suns.

模拟结果显示，使用由289块子镜组成的8m×8m的非成像聚光定日镜的太阳炉，配合一个0.7m口径，焦距27cm的球面二次反射镜，可以达到25，000个太阳的聚光效果。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐