查询词典 spherical angle

If you are using "knife-edge", I presume that you are checking the flat against an auxilary spherical mirror then how good is your auxilary spherical mirror is ?

如果用刀口法，我推测你是通过一个辅助球面对平面进行检测的，但你的辅助球面精度是怎样的呢？

The off-axis reflection system composed of four aspheric mirrors was designed, but the system structure was not so simple and the performance can also be improved, besides, manufacture and test for large aspheric mirrors are difficult; and then the spherical Fresnel mirror which is easier to be manufactured and tested was used to replace the aspheric mirror, the spherical Fresnel mirror has low cost of replication, but this design also can\'t be used in projection lens because it was only feasible in narrow wavebands; Furthermore, the design making use of catadioptric projection lens was accomplished, this design is greatly applied in rear projector because it has merits of both refraction and reflection. But it had difficulties in color aberration correction and had complex structure.

设计了四片非球面组成的离轴式反射系统，然而，仅采用非球面设计系统结构不够精简，性能也有待进一步提高，且非球面面形较大时加工和检测都存在一定的困难；继而提出了用球面Fresnel反射镜代替非球面的设计方法，虽然Fresnel反射镜加工和检测更为简单，且复制成本低，但对波长具有选择性；进而，应用折反系统结合的方式设计了离轴式投影镜头，该方法因兼具折射和反射的优点，在大屏幕超薄背投系统的设计中广为应用，缺点是会产生难以校正的色差，且结构复杂。

Author has described the existing problems in process of design,fabrication and installation for 5 000 m3 PVC spherical tank;discussed the problems and its solution for analysis design;design change for spherical shell sector plate dimension ;weld gap exceeding the standard requirement etc.

叙述了5 000 m3氯乙烯球罐在设计、制造和安装过程中出现的问题；论述了关于球罐分析设计、球壳板尺寸设计变更、焊缝间隙超标等问题的原因和解决办法；针对球壳板制造和组装过程中出现的纵、环缝间隙问题，提出了调整安装形式的改进措施。

With the theoretical model of spherical grain dynamics of sparse two-phase flow in single dimension, computing formulas of velocity′s attenuation and scattering distance were built for explosive residue grains in horizontal. Then, a simplified theoretical model on distribution of explosive residue was put forward on the basis of a spherical space with radius equalling to maximum horizontal scattering distance of explosive residue grains with certain diameter.

为了对残留物颗粒的飞散运动及分布规律进行理论分析，利用球形颗粒一维稀疏二相流动力学模型，研究得到炸药残留物颗粒的速度衰减及水平飞散距离计算公式；在此基础上，建立了以某粒径残留物颗粒水平运动极限距离为半径的炸药残留物颗粒球面空间分布简化理论模型。

There is not an effective method for measurement and assessment of large caliber spherical surface in the realm of spherical surface inspection.

在球面检测中，对大口径球面的测量和评价缺乏有效的手段。

Spherical container design,"in" and trigonometry for the spherical surface ...

球形容器设计》在《等三角学用于球面上。。。

There can be calculated in a large spherical surface can put the number of small spherical!

还有可以计算在一个大球面上可以放多少个小球面！

The planet gear spherical grinder is according to the spherical surface is designed.

行星齿轮球面磨专机是根据球面磨削原理来设计的。

The spherical gear is a new type of gear formed by attributing ring teeth on its spherical surface.

球齿轮是在其球冠面上分布着环形齿的新型齿轮。

Spherical triangle : the sphere of the three point arc banded together with three large, surrounded by the graph is called spherical triangle .

球面三角形：把球面上的三个点用三个大圆弧联结起来，所围成的图形叫做球面三角形。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

Talk Undelete failed; someone else may have undeleted the page first.

Talk 无法删除选定的页面或图像（它可能已经被其他人删除了）。