抛物面

The control principle of electrostatic shaping was introduced according to the balance between electrostatic force and resulting force formed by membrane deformation and the complex shaping process of SMEC. Then, taking the trisection circularity electrode for an example, the distribution characteristic of electric potential in the electrostatic field was analyzed, namely, the expression of potential function in the electrostatic field was deduced by Laplacian equation. And then, by combining the difference equation with electric potential expression, the numerical solutions of electrostatic force in single electrode mode and trisection circularity electrode mode were disposed.

根据静电力与薄膜变形载荷作用力之间的平衡关系和静电拉伸薄膜反射镜成形的复杂过程，介绍了薄膜反射镜静电成形的控制原理；以三等分环状电极为例，分析了静电场中空间电势分布特性，即从拉普拉斯方程推导出静态场势函数的表达式；然后，利用差分与电势方程结合的方法，对单电极电场力和三等分环状电极电场力进行了数值求解；最后，将计算面形与理想抛物面进行了比较，结果显示，单电极情况下得到的薄膜反射镜面形不是理想抛物面，若采用多电极控制可获得更高的控制精度。

This method can be used to the detection and optical adjustment of parabolic mirrors.

该方法可用于抛物面反射镜检验，也可用于抛物面反射镜的调校工艺中。

The convergence effect of reflected light was simulated in the paraboloid connected with small plane mirrors.

利用小平面镜逼近抛物面的方法研究车灯线光源的设计问题，通过在抛物面内内接小平面镜模拟抛物面反射光线的汇聚作用。

A radio telescope's beam depends on the diameter of its dish; the bigger the dish, the narrower the beam.

射电望远镜的光束依赖于抛物面直径的大小：抛物面越大，光束越窄。

Solar energy ; high--temperature furnace ; collector; optical sysem ; lens by parts ; transmissionreflection type ; paraboloid mirror ; family of confocal rotation paraboloids

太阳能；高温炉；聚光器；光学系统；分部透镜；透反型；抛物面镜；共焦旋转抛物面族

However, if you want to use the cheap production of SAT TV offset parabolas for the work on 13cm Ham band or WLAN frequencies; you have to try to construct the feed that matches existing parabolas.

无论如何，如果你想用一个低制作成本的卫星电视偏馈抛物面天线，工作于13厘米的业余无线电频段或者WLAN波段，你必须制作一个与现有抛物面反射器相配的馈源。

Efficiency of 2 el. bi-quad feed with parabolas having different F/D ratio

图。18。用叠加双菱天线做馈源的不同F/D比率的偏馈抛物面天线的效率 19 November，2009 2.4GHz 抛物面天线的高效馈源 Fig。

However, if you want to use the cheap production of SAT TV offset parabolas for the work on HAM or WLAN frequencies; you have to try to construct a feed that matches those parabolic reflectors.

无论如何，如果你想用一个低制作成本的卫星电视偏馈抛物面天线，工作于业余无线电频段或者WLAN波段，你必须制作一个与现有抛物面反射器相配的馈源。

Introduction 引言 The problems that occur while illuminating shallow offset parabolas, in addition to those related to the efficient use of parabolic generally, are additionally aggravated by the specific geometry of the parabolic mirror itself.

这个问题时常存在于浅照射的偏馈抛物面天线上，除了和抛物面天线的效率有关之外，抛物线反射面本身的具体几何形状又使之更加严重。

Over the analysis to grinding methods of mould core in reflecting cover of lamps with paraboloid, the thinking on developing professional grinding tool is provided, and the grinding track of paraboloid with scale distribution on surface is calculated.

通过对抛物面反射罩模具型芯磨削方法的分析，提出了研制专用磨削机床的设想，并对表面有鱼鳞块分布的抛物面磨削轨迹进行了计算。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。