| 1. | The cycle sum of the rotation group of the octahedron was calculated .
正八面体的旋转群的循环和已算出。 |
| 2. | Closed form solution to workspace of double - octahedron variable geometry truss robotic manipulators
二重八面体变几何桁架机器人工作空间解析 |
| 3. | In the 1960s the most popular pattern had 336 dimpled octahedrons in parallel circles around the ball
在20世纪六十年代最流行的式样是336个八面体酒窝（豆点）分布在环绕球面的平行圆周上。 |
| 4. | The error formulas of position and orientation for the octahedron parallel machine tool and the new type of parallel machine tool are set by using perturbation method
利用摄动法得出了八面体并联机床和新型并联机床的位姿误差关系式。 |
| 5. | Based on it , the monte carlo simulation is implemented for the octahedron parallel machine tool , and then the statistical frequency histogram is given
在此基础上，对八面体并联机床的位姿误差进行了montecarlo模拟，给出了统计频数直方图。 |
| 6. | Znd2180 complete crystal shape , perfect cubic octahedron , good diaphaneity , high impact strength and thermal stability , suitable for high grade cutting , drilling , and grinding tools
Znd2180晶体完整，具有完整的立方八面体，透明度好，高的抗冲击强度和热稳定性。适用于高档次切割工具、钻头、碾磨工具。 |
| 7. | 4 . the molecular structure shows that there are two types of coordination environment for fe atoms . one is formed by two n atoms and four o atoms , another by six o atoms , all in distorted octahedron
分子结构表明存在两种fe离子的配位环境。一种为2个配位n原子和4个配位o原子，另一种为6个配位o原子均为畸变八面体。 |
| 8. | Plato conjectured each of these elements to be made up of a certain platonic solid : the element of earth would be a cube , of air an octahedron , of water an icosahedron , and of fire a tetrahedron
柏拉图推测每一种元素都是由某些理想立方体组成：地元素是由立方体组成，风元素是一个八面体，水元素是二十面体，火元素是四面体。 |
| 9. | The equations of workspace boundary surfaces for double - octahedron variable geometry truss pmts are derived based on surface analysis method . the projection and section curve grapha of workspace boundary surfaces for double - octahe
推导出了zrps ztps型及m 3tps型并联机床运动学分析的一阶和二阶影响系数矩阵，得到了其运动学模型。 |
| 10. | These analy ' tical expressions are solved using homotopy cofitinuation algorithjns , all solotions of singularity configuration are obtained . a numerical exarnple of singularity configuration analysis for double - octahedron variable geometry truss pmts is given . ,
以r 3tps型并联机床为对象，提出了一种精度建模方法，该方法将精度建模的问题转化对应的“虚拟机构”的运动分析问题。 |
