1) twelve-fold rotational symmetry
十二次对称性
2) icosahedron symmetry
二十面体对称性
3) decagonal quasicrystal
十次对称二维准晶
1.
By means of the complex variable method, this investigation addresses two kinds of contact problems in decagonal quasicrystalline materials.
采用复变函数法探讨了在一个刚性压头作用下十次对称二维准晶材料的两类接触问题,即具有有限摩擦的接触问题以及粘结接触问题。
2.
The general solution for plane strain problems in decagonal quasicrystals accounting for thermal effect is derived.
推导了当考虑热效应时十次对称二维准晶体平面应变问题的通解表示。
3.
A decagonal quasicrystal, which is weakened by an arc-shaped crack penetratingthrough the solid along the period direction, and which is subjected to remote uniform phonon stresses,is investigated by applying the complex variable method which is just developed by the authors.
采用复变函数法研究了在远场承受均布声子场机械载荷作用下十次对称二维准晶中穿透周期轴的一个圆弧形裂纹。
4) persymmetry
次对称性
1.
By exploiting the persymmetry property of toeplitz covariance matrix,we propose a new method of covariance matrix estimation to implement constant false alarm rate(CFAR) detection algorithm based on GLRT.
利用Toeplitz矩阵的次对称性提出了一种新的杂波协方差矩阵结构的估计方法,并用此估计方法来实现基于广义似然比检验的恒虚警检测算法。
5) diad
['daiæd]
二次对称轴
6) 5-fold axic
五次对称性
补充资料：十二次
| 十二次 中国古代对周天的一种划分方法。其方法是把黄赤道带天区自西向东划分为十二部分，并依次命名为星纪、玄枵、娵訾、降娄、大梁、实沈、鹑首、鹑火、鹑尾、寿星、大火、析木。十二次的创立大概起源于对木星的观测，创立年代在春秋时期或更早。十二次、十二辰和二十八宿有表中所示的对应关系。
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参考词条