正二十面体

正二十面体和二十面体对称病毒

Icosahedron and Icosahedral Viruses

柏拉图知道的最后一个这种构形是正二十面体。

The last of these figures known to Plato is the icosahedron .

在等弧长比投影族球面正二十面体投影基础上设计了球面三角四叉树剖分模型（EARPIH）。

Based on the spherical icosahedron case of Equal Angle Ratio Projections ( EARP ), a new Spherical Triangle regional Quadtree ( EARPIH ) is constructed .

运用经典粒子动力学模拟方法，研究了飞秒强激光脉冲（1015～1016W/cm2）与正二十面体构型氢原子团簇H13，H55，H147和H309的相互作用。

Using classic particle dynamics simulations , the interaction process between an intense femtosecond laser pulse ( 10 15 ~ 10 16 W / cm 2 ) and icosahedral hydrogen atomic clusters H 13 , H 55 , H 147 and H 309 has been studied .

大小相近的原子倾向于形成正二十面体配位；

Equal-sized atoms tend to form regular icosahedra in 12-folded coordination .

壳粒在正二十面体病毒衣壳中的排列及其数学推算

The Arrangment of Capsomers in an Icosahedral Capsid and Its Mathematical Calculation

由于正二十面体的对称壳层结构，离子动能分布具有尖峰结构。

Because of the symmetrical shell structure of the icosahedron , the distribution of the ionic kinetic energy features some pinnacles .

仿真结果表明：在纳构件件表面出现正二十面体的结构，并出现密排结构和缺陷的面心立方结构。

Simulation results show that : In the surface of nanostructure have similar icosahedral structure are appeared . There is also the close-packed structure and defect FCC structure appeared .

较高的碰撞平动能有助于两个金原子团簇碰撞后形成能态较低的正二十面体等准晶结构。

Higher collision energy may be more helpful to form the quasi-crystal icosahedron , which has lower energy status , when cooling to 300K after rearrangement collision of two gold clusters .

由此构建的二十面体准点阵结构模型有六个5-次轴，十个3-次轴和十五个2次轴，具有同正二十面体一样的点对称群5-3-2/m。

It is shown that the constructed model has six 5 - axes , ten 3 - axes and fifteen 2 axes . It has the same point group as an icosahedron , namely 5-3-2 / m.