Dihedral group ( I_2 ( m)) and Coxeter group of group H_3, H_4) are noncrystallographic in irreducible finite Coxeter group.

Considering the action of dihedral group on some concret array spaces, this paper studies the symmetry of array space, computes the cycle index and points out some applications of cycle index.

本文通过将二面体群作用在一些具体的阵列空间上，讨论阵列空间的对称性，计算二面体群所对应的循环指标，并且指出循环指标的一些应用。

The Dihedral Group D_n and a kind of Omni_Direction Permutations on Z_n

二面体群D n与Z n上的一类全向置换

This paper give the resolution of a combinatorial calculating problems by ways of calculating the indexes of dihedral group and regular polyhedron group.

通过对二面体群、正n面体群等指标计算给出一系列组合计数问题的解答。

It is also proved that Cayley graph with 3 degree on a dihedral group is rational.

同时也证明了三度二面体群上的Cayley图是有理的。

Hopf Ore Extension over a Dihedral Group and Its Hopf Algebra Structure

二面体群上的Hopf Ore扩张及其代数结构

Finally, structure of Lie superalgebra associated with dihedral group is discussed.

最后，讨论了与二面体群相伴的李超代数的结构。

The dihedral corner reflector with wing and fuselage joint of aircraft is a very strong electromagnetic source in a wide angular range.

飞行器翼身接合部构成的二面角反射器是很强的电磁散射源。

Calculation of the Scattered Field From a 2-D Perfectly Conducting Dihedral Corner Reflector

栅的散射场研究二维理想导体角反射器电磁散射场的计算

But traditional RCS computation method is only suit for the ideal dihedral corner reflector.

但是传统的计算方法仅仅适用于理想二面角反射器。

Physical Optics Approximation to the Range Profile Signature of a Dihedral Corner Reflector

基于物理光学方法二面角反射器一维距离像特征信号计算

Complex ray analysis of dihedral corner reflector coated with radar absorbing materials

吸波涂层角反射器RCS的复射线分析

The major scattering resource in top direction is radar antenna or infrared head, in side direction is dihedral reflector formed by missile wings, missile body and wings.

其主要散射源在头向为雷达天线或红外导引头，在侧向为弹翼之间的二面角以及弹身、弹翼。

Combined with the equation of traveling wave and dihedral reflector, the RCS of total missile was calculated.

结合计算行波和二面角散射的经验公式，计算了导弹整体的RCS。

Digitally synthesized amplitude filter

数字综合振幅滤波器

Improvement measures of exhaust gas from digesting diluted tank

高压溶出稀释槽乏气利用的改进措施

The corrosion behavior of rotary spherical digester in neutral ammonium sulfite cooking and corrosion control

亚铵法制浆过程中碳钢蒸球的腐蚀行为与防腐蚀措施

The analysis of high-pressure rotary spherical digester about its destructive stress and limiting bearing capacity

高压蒸球一次应力及其塑性极限承载能力分析

The Effect of Steam Supply in a Rotary Spherical Digester on Cooking Time and Pulp Quality

蒸球布汽方式对蒸煮时间和纸浆质量的影响

Application of Sliding Bearing and Its Lubrication on Rotary Spherical Digester

蒸球滑动轴承及润滑应用的探讨

The test analysis of influence of welding defects on working life of rotary spherical digester

焊缝缺陷对蒸球使用寿命影响的试验分析