You can also use cones , cylinders , and pyramids to make your charts stand out 也可使用锥形图、圆柱图和棱锥图来生成个人图表。
2.
The formulas of lateral area , surface area , and volume of pyramid can be given by vector method 立体几何中棱锥的侧面积、全面积、体积公式都可用向量方法给出。
3.
In this thesis , the properties of the free - space propagation and focus were studied when a beam propagates through an axicon 本论文主要是探讨激光光束经过轴棱锥转换后产生的无衍射光束的传输特性和聚焦特性。
4.
P - type silicon crystal plates have been adopted in the text , which are formed mask sio2 by heat - oxygenation . and figures are diverted by normal light etching technology 本文采用p型单晶硅片，由热氧化形成sio _ 2掩膜层，标准光刻工艺进行图形转移，用koh溶液湿法刻蚀制作倒四棱锥腐蚀坑列阵。
5.
Based on huygens - fresnel diffraction integral theory , the propagation properties of bessel beam were studied in this paper . by using the analyses of geometrical optics , hollow beam are found and the formula of the starting point 、 the end point and the bottle length can be got 论文中,我们基于惠更斯-菲涅耳衍射积分理论研究了由轴棱锥产生的贝塞尔光束的传输特性,并且通过几何光学解析无衍射光束的聚焦特性。
6.
In the experiment , we use the he - ne laser and the semiconductor laser as the source , record the bessel beam patterns behind the axicon by using a digital camera and a microscope , measure the radius of the bessel beam central spot by film - scanning and measure the effect of both the radius of the aperture and the open angle of the axicon on the maximum non - diffraction distance . the experiments show that a specific propagating range has constant power and the beam has a bessel - like distribution in this range . the results agree with the beam corresponding to a diffraction free beam 同时我们还采用胶片扫描的方法测量了无衍射光束的中心光斑尺寸,测量了不同光阑孔径和不同棱角情况下的最大无衍射距离和传播轴附近横截面内微小光孔中的光强,实验结果显示当激光光束经过轴棱锥转换后有一段距离功率变化很小,且分布近似贝塞尔分布,符合无衍射光束的特性;经过聚焦后,呈现三维分布中空的光束bottlebeam ,实验结果与理论分析基本吻合。
