查询词典 concave polygon

At present,this apparatus is used mainly for the examination of the perfectness of convergent spherical wave surface with aperture angle≤1:3,hence it can be used for the non-contact direct test of aluminized or unaluminized concave mirrors with any ...

因此可以用来无接触的直接检验任意口径的镀铝或未镀铝的凹球面镜；加入辅助镜后可以检验平面镜、天文望远镜用的各种非球面镜、介质的均匀性、光学系统的质量、光轴校正及安装变形情况；也可给出物镜对于现用激光波长(6328)的波面差及测出某些象差。

Experimental TEA CO2 laser with printed circuit board preionization is used. The laser has gain length of 90 cm. The resonator is composed of a total-reflective concave spherical mirror of curvature radius 20 m and a total-reflective plane mirror of mirror radius 4.5 mm, separated by 5 m distance.

实验中TEA CO2激光器采用印刷电路板预电离结构，增益长度90 cm，腔长5 m，球面全反射镜曲率半径20 m，输出端平面镜半径4.5 mm，得到了内环半径为4.5 mm、外环半径为5.5 mm的基模环形光斑输出。

Moreover, coefficient of friction μ and the radius of spherical concave surface R are the main factors of the structural design.

此外，隔震层摩擦系数μ和滑道半径R是摩擦滑移隔震结构设计的主要因素。

One unique attribute of the system is the use of a special removeable squirter assembly which is designed to allow access into tight concave radii.

系统的一个独特的属性是应用了一个独特的可移动的喷嘴，该设计是为了能够探测到半径很小的凹槽。

In the separating-light system, the concave grating is drove by the step-in electrical machine to separate spectrum signal in the range of visible light.

在分光系统中凹面光栅被步进电机驱动在可见光的范围内将光谱信号分离，由于采用了全息凹面光栅作为分光元件省去了准直，聚焦系统，使本系统结构简单，具有体积小等优点。

By using shape analysis,stereoscopy and moment of image,a number of eigenquantumwere extracted,such as radial diameter,tangential diameter,length and area of lumen,complexof cell,comers of edge and convex-concave properties.At the same time,the algorithm ofextraction and statistical analytic methods of pattern features were put forward.

利用形态分析、体视学及图像的矩来提取如早、晚材细胞的径向、弦向直径、管胞长度、面积、密质度及边缘的角、凹凸性等特征量，并提出了这些模式特征的提取算法和统计分析方法。

Inner filaments subulate to narrowly ovate at base, entire; ovary without concave nectaries at base.

内轮花丝钻形的到狭卵形在基部，全缘；没有凹陷蜜穴在基部的子房。

Seed face concave or with a broad, shallow sulcus.

种子表面凹或具一宽的，浅的槽。

A concave bone of the human foot,located between the talus and the metatarsals.

脚的舟骨人脚上的凹骨，位于踝骨和骨之间

The 3 kinds of concave earthquake precursors in seismogenic process-vector, stress and telluric current concavity are summarized.

总结了反映孕震过程的矢量凹形、应力凹形、地电凹形等3种凹形震兆，阐述了水汞、水氡突跳，形变相关系数和地磁最大相关系数等前兆图像及其预报作用。

According to our present broadcasting situation,the thesis proposes using new technology to update and reform the present HFC. It also suggests broadcasting using self-advantage and arranging EPON in order to win the supermarket.

论文从我国广电的现状出发，结合实际，积极倡导采用新技术更新、改造我国现有的HFC网络；倡导广电现阶段利用自身优势，部署EPON网络来赢取市场。

A new general kinetic equation was derived in which the effect of the removal of condensation water was taken into account completely, and was applied to the polyesterification kinetic study of AA/HPHP and AA/NPG. It was found that the reaction order of self-catalyzed polyesterification was not constant. For these polyesterifications, the reaction order was 2.5 at a low temperature, while 3.0 at a high temperature.

考虑缩合水的排除对反应体系的影响，用体积浓度单位推导出一个新的聚酯反应总包动力学方程，并应用到AA/HPHP和AA/NPG两个聚酯化反应的动力学研究中，研究发现，自催化聚酯反应的反应级数并不是固定值，对于AA/HPHP和AA/NPG两个聚酯化反应而言，低温时反应级数为2.5，高温时反应级数为3.0。