查询词典 symmetry

The completely diagonalized Hamiltonian matrixes of order 120 of 3d3/3d7 ions configuration in the trigonal symmetry have been established by irreducible representation method and group theory,taking into account spin-orbit interaction and spin-spin interaction.The ground-state energy levels,the zero-splitting parameter and Jahn-Teller effect of ruby crystal were calculated with the matrixes.

应用不可约张量方法和群的理论构造了三角对称晶场中考虑自旋-轨道相互作用，自旋-自旋相互作用的3d3/3d7离子的可完全对角化的120阶微扰哈密顿矩阵，利用该矩阵计算了红宝石晶体的基态能级、零场分裂参量和Jahn-Teller效应，研究了自旋-轨道的自旋二重态对基态能级的贡献，证明其二重态对基态能级的贡献是不可忽略的，理论计算值与实验值相符合。

Of arbitrary isogon of arbitrary linear symmetry transformation , breaking the forme .

这是关于任意正多边形关于任意直线的对称变换，打破了以前的只能对于一个固定的直线的对称变换，省去了关于固定直线对称时每次都要输入的麻烦

Based on raw materials, this thesis begins with Escher's exploration of mathematical methods, analyzes his regular division of the plane with preliminary symmetric principles-concepts about symmetry and isometry transformation, rotation, ref...

本文基于原文资料的整理，以埃舍尔对数学方法的探索为切入点，运用数学中初步的几何原理——对称概念及等距变换概念(旋转、平移、反射、滑移反射)对埃舍尔的周期性空间分割图案进行了详实的分析，进而对艺术设计的形式中感性与理性、艺术设计与科学等关系进行探讨。

The ground state configuration of Pt3 cluster is an isosceles triangle with Cs symmetry in the 1A' electronic state.

Pt4和Pt6的基态结构分别为具有C(下标 2v)对称性的蝶形结构和"船形"结构，对应的基电子态分别为3B2和5A2。

We proved that the minimal surfaces were isothermal parameter surfaces and harmonic surfaces. The symmetry and the self-intersection properties of the minimal surfaces were studied.

证明了该曲面既为等温参数曲面又为调和曲面，并研究了该曲面的对称性质与自交性质。

It is proved that -1 couldnt be the eigenvalue of Jacobian matrix of Poincare map at fixed point by the analysis of the symmetry of the system.

第三章分析了一类两自由度碰撞振动系统的周期运动，并通过计算Poincare映射的线性化矩阵，确定周期运动的稳定性。

However, Synthetic saddle trees are becoming increasingly popular (Bates, Kieffer, Prestige are all examples), and these now offer great strength, reliability and total symmetry.

Synthetic 综合马鞍 Tree 正逐渐流行（ Bates，Kieffer，Prestige 等均使用此），原因就是这类产品可以具有更好的强度，可靠性以及完美对称。

Now we have succeeded in generalizing the method to non-planar strips with toroidal and Klein bottle strips by taking into account the rotational symmetry of these strips.

考虑具有环形和Klein bottle边界条件所具有的旋转对称性，如今我们巳成功地将这个方法进一步推广到这些非平面的长条。

Development of OA kneepad : The kneepad density-wave output can be controlled by 2Hz different frequencies to 300 Hz stimulation pulse component, the pulse width of 100 to 150 μ s between the positive and negative output symmetry to the stimulation pulse. The rechargeable mobile phone batteries ( 3.7V) were served as power supply and SCM as timer with automatic shutdown after 30 minutes.

OA护膝的研制：护膝输出的疏密波可控制由2～300Hz不同频率刺激脉冲组成，脉冲宽度在100～150μs 之间，输出正负向对称的刺激脉冲，采用可充电的手机电池(3.7V)供电，单片机定时，30min 自动关机。

Therefore, restoring the chiral symmetry in lagrangian come out to be very important.

因此组份夸克模型中一个重要的问题就是要在拉氏量中恢复手征对称性[31]。

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。