正棱柱

用摄动法求静止流体中二维正棱柱体固有频率的近似解

An Approximate Solution of the Natural Frequency to the Regular Prism in Quiescent Fluid by the Perturbation Method

本文用摄动法求解了二维正棱柱体在静止流体中固有频率的近似解，从而避免了直接求其精确解所遇到的困难。

This thesis finds an approximate solution of the natural frequency to the regular prism in quiescent fluid by the perturbation method , hence avoiding the difficulties in finding its exact solution by a direct way .

基于正棱柱变异型纸盒的研究

Research on the Vertical Prism Variation Box

兰州小型晶体球由14个几何形状为正六棱柱的BGO探测元组成。

A tiny Lanzhou crystal ball consists of 14 hexagonal prism BGO detector units .

设计了正八棱柱模拟靶对靶场坐标系进行标定；

A regular eight-angular prism simulative target for calibrating the shooting range coordinate is designed .

其扭力段由正四棱柱形改为正六棱柱形的，这样可以与有正内六角孔的风动扳手相插配使用，有提高工效的特点。

Therefore , the overthread screw tap can be matched with a pneumatic wrench having regular hexagonal holes via insertion , and the overthread screw tap has the advantage of high work efficiency .

螺纹自动退刀安全防撞装置以车削正四棱柱为例，进行了误差分析，得到了刀具长度与工件尺寸和容许误差间的关系。

Then by taking the regular square prism as an example , the machining error is analyzed , and the relationship among the length of the lathe tool , the work dimension and the tolerance is obtained .

利用球面和多面角的几何性质，采取逐步覆盖的方法，讨论了球内接正四面体、正n棱柱算法，在这个基础上，提出菠萝形算法和球冠逐步覆盖法。

In this paper , the regular tetrahedron algorithm and the n-side regular prism algorithm were discussed , according to the geometric properties of spheres and polyhedral angles and by using the method of stepwise covering .