查询词典 symmetry

The digital down converter adopts octant mapping algorithm and utilizes the symmetry of sinusoidal value and cosine value to divide [0, 2 Pi] into eight sections.

本数字下变频器采用八分圆映射算法，利用正弦值、余弦值的对称性，把[0，2π]分成8个区间。

From the basic theory of spherical symmetry GRIN medium, we bring out a new method on calculating the GRIN distributiing function., then several examples are given on the method.

第四章：由一种新的光线轨迹提出一种新的梯度折射率分布，并研究了具有这种分布的介质的光学性质，其中重点是其对表面漫射材料性能的改善。

It has great potentialities in such fields as micro-optics, integrated optics and optics communication.Firstly, based on the basic theory of GRIN optics the optical effects of the spherical symmetry GRIN micro-sphere lens were analyzed systematically.

本工作从梯度折射率介质光学的基本理论出发对球对称GRIN微球透镜的光学性能进行了系统分析；选择两种适当单体，采用悬浮扩散共聚法制备出聚合物梯度折射率微球透镜；测量所得透镜的折射率分布曲线和其他光学参数。

Therefore, the possibility that the film flow was in onflow state was very low under the fisher swing frequency even though the swing affixation force acted on the film. In falling film absorption process, the velocity, temperature and concentration distribution of the liquid film was symmetry on the swing plane basically.

降膜吸收过程中，液体的速度、温度和浓度分布基本上是关于摇摆平面对称分布；速度场、温度场和浓度场的变化周期近似等于摇摆周期；摇摆幅度和摇摆频率直接影响降膜吸收的效果，摇摆频率越低或幅度越大，吸收效果越差。

The general characteristics of concrete failure surface, such as convexity, open-endedness and three-axis symmetry about the hydrostatic axis were also fulfilled.

一些研究者通过大量的实验指出，混凝土的强度包络面具有光滑、外凸、三轴对称、压缩应力端开口等特性[1-3]。

According to the different orientations of domain walls with respect to the (100) observation plane of a foil, 90°domain boundaries may be divided into two kinds. one is thin lens or ring shaped a-a 90°domain boundary, and the domain wall lies on the {110} plane; Usually, most of these domain boundaries are uncharged; according to the extinction rules for the (011) domain walls, the displacement vector 〓 along 〓 can be dertermined, which is parallel to the line of intersection between the domain wall and the plane consisting of spontaneous polarization vectors on both sides of domain boundary; from selected area electon diffraction of crystals including domain boundary, we not only examine slight difference in the crystal parts on both sides of the domain boundary, but also obtain crystallographic relationship between them, that is, there exists a 180°rotation symmetry operator along a normal of domain wall. The other is Z or ring shaped a-c 90°domain boundary along {010} direction, and the displacement vector 〓 runs along 〓 direction.

根据界面相对于样品中(100)观测面取向的不同，90°畴可分为两类：一类为薄透镜片状或环状的a-a90°畴，其界面平行于{110}，多数不带电，由消光规律可确定其位移矢量平行于畴界面与自发极化所在平面的交迹，即，〓方向，而从包含畴界的选区电子衍射图可知，这种不带电的90°畴界两侧存在微小的取向差，其界面两侧的结晶学关系为以界面法线为二次轴的旋转关系；另一类为Z状或环状的a-c90°畴，其界面平行于[010]或[001]，相应的位移矢量为〓方向。

This dissertation studies mainly on operator method and symmetry in quan-tum m...

本篇论文主要研究量子力学模型中的算符方法与对称性。

This dissertation studies mainly on operator method and symmetry in quan-tum mechanical models.

本篇论文主要研究量子力学模型中的算符方法与对称性。

The advantages of the hybrid CIS-DFT method are that it can determine the symmetry of molecule and the correct order of excitation as well as the Molecular Orbital electron configuration;thereby the electronic excitation states of ethylene are easily derived, and most of them are in agreement with those obtained in experiments or references.

CIS-DFT的优点在于能确定外场下分子的对称性，给出正确的激发顺序以及分子轨道的电子组态，由此导出乙烯分子的激发态，结果与实验一致。

An intrinsic symmetry property of subatomic particles that is characterized by the behavior of the wave function of such particles under reflection through the origin of spatial coordinates.

本质均衡性亚原子粒子的本质平衡性，以其波函数在通过空间坐标原点的反射下的移动状况为特征

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％。