The cycle sum of the rotation group of the octahedron was calculated . 正八面體的旋轉(zhuǎn)群的循環(huán)和已算出。
Closed form solution to workspace of double - octahedron variable geometry truss robotic manipulators 二重八面體變幾何桁架機(jī)器人工作空間解析
In the 1960s the most popular pattern had 336 dimpled octahedrons in parallel circles around the ball 在20世紀(jì)六十年代最流行的式樣是336個(gè)八面體酒窩(豆點(diǎn))分布在環(huán)繞球面的平行圓周上。
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 利用攝動(dòng)法得出了八面體并聯(lián)機(jī)床和新型并聯(lián)機(jī)床的位姿誤差關(guān)系式。
Based on it , the monte carlo simulation is implemented for the octahedron parallel machine tool , and then the statistical frequency histogram is given 在此基礎(chǔ)上,對(duì)八面體并聯(lián)機(jī)床的位姿誤差進(jìn)行了montecarlo模擬,給出了統(tǒng)計(jì)頻數(shù)直方圖。
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晶體完整,具有完整的立方八面體,透明度好,高的抗沖擊強(qiáng)度和熱穩(wěn)定性。適用于高檔次切割工具、鉆頭、碾磨工具。
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 分子結(jié)構(gòu)表明存在兩種fe離子的配位環(huán)境。一種為2個(gè)配位n原子和4個(gè)配位o原子,另一種為6個(gè)配位o原子均為畸變八面體。
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 柏拉圖推測(cè)每一種元素都是由某些理想立方體組成:地元素是由立方體組成,風(fēng)元素是一個(gè)八面體,水元素是二十面體,火元素是四面體。
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 推導(dǎo)出了zrps ztps型及m 3tps型并聯(lián)機(jī)床運(yùn)動(dòng)學(xué)分析的一階和二階影響系數(shù)矩陣,得到了其運(yùn)動(dòng)學(xué)模型。
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型并聯(lián)機(jī)床為對(duì)象,提出了一種精度建模方法,該方法將精度建模的問(wèn)題轉(zhuǎn)化對(duì)應(yīng)的“虛擬機(jī)構(gòu)”的運(yùn)動(dòng)分析問(wèn)題。