对称

Symmetry or antisymmetry constraint generations are based upon the valid degrees of freedom in the model, i.e., the degrees of freedom associated with the elements attached to the nodes.

对称或非对称约束生成法是基于模型的有效自由度之下的。也就是关于单元的自由度与节点相关联。

The Laser Raman Microprobe study of these quenching melts has obviously shown that within the high frequency region (900~1200cm-1), the higher the pressure, the smaller the frequency of T-Onb symmetry and antisymmetry stretching vibration.

其激光拉曼微探针研究表明：随压力增大，T-Onb在高频区(900~1200cm-1)的对称和反对称伸缩振动频率明显减小；过铝质熔体中存在六配位铝，且随压力增大，铝的配位数可能有从四配位向六配位转化的倾向。

They clearly support the existence of asymmetries in similarity judgments and the effect of brand names on those asymmetries.

他们很清楚地支持相似性判断中不对称的存在及品牌对那些不对称的影响。

When two communicants and an adversary obtain correlated information through independent binary symmetric channels from a random source, and the adversary's channel is noisier than those of communicants, an authentication scheme which uses the correlated information between the two communicants is proposed based on the coding theory to make possible information theoretic secret key agreement against active attacks.

在无条件安全密钥协商中，假定通信双方通过相互独立的无记忆二元对称信道来接收二元对称信源所传送的信息作为初始信息，在这种条件下，本文提出了一种利用他们之间的初始相关信息对公共信道上的消息进行认证的具体方案，从而使得无条件安全密钥协商具有抗主动攻击的能力。

In the second chapter, we discuss the depletion interaction between two big hard spheres under the symmetrical geometry confinement. The depletion interactions under the unsymmetrical geometry confinements are studied in the third chapter. The second and the third chapter involve the author s original works.

第二章主要讨论了在对称的几何约束下两大胶球间的排空作用；第三章主要研究了非对称几何约束下两大胶球间的排空作用和同样约束下旁系大胶球对大胶球与硬板之间排空作用的影响；第四章简短地总结了本文的工作，并对以后的工作提出了一些展望。

In this dissertation, we discuss mainly the existence problem of large sets of Hamiltoncycle and path decompositions.

本文主要研究完全图、完全二部图、完全对称有向图及完全对称有向二部图上的无向Hamilton圈和Hamilton路分解的大集问题以及几乎Hamilton圈和几乎Hamilton路分解的大集问题。

It is a common problem tocombine the eigenfunctions for the system with a given symmetric group-into thesymmetrical adapted bases,belonging to the irreducible representations ofthe group.

我们知道，一个具有给定对称性的哈密顿量的本征态可按对称群的不可约表示组合成对称基。

In this space, we construct two kinds independent phase operators by improving supersymmetric annihilation operator and supersymmetric creation operator, and then obtain their eigenstates.

我们进一步将它推广到用超对称谐振子的产生算符和湮灭算符来构造适用于超对称谐振子的双摸相位空间里的二类独立的相位算符并相应地求出了其归一化的本征态。

Normal occlusion also has midline deviations. The asymmetry of face was larger than that of dental occlusion.

正常人群有中线偏移，面部的不对称大于牙颌的不对称。

In the whole considered frequency range, the acoustical performance of rotationally asymmetric structures is better than that of symmetric structures.

且在整个计算频率范围内，非旋转对称结构的吸声性能都要优于旋转对称结构。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。