查询词典 symmetry

In fact, we present the characterization of multiscaling functions and multiwavelets with the desired symmetry in terms of matrix filter and polyphase matrix.

我们表明这种矩阵的扩充总是可解的并给求解这种仿酉矩阵的对称扩充的计算方法。

The relation between the output phase differences and the losses of 2×2 and 3×3 optical fiber couplers with rotatory symmetry is deduced in this study, which is based on the characteristics of scattering matrix and Hermite positive definite quadratic form of the couplers.

前 言光纤耦合器用于诸如光纤干涉系统、光纤环、波分复用器件和光纤通信中的分集接收等场合时，除了要求适当的输出功率比以外，尚需考虑输出端光场间的相位关系［1～3］。

This part is divided into four small parts, they can be summarized as the following: 1 The symmetry and homogeneity of tall building is presented in four aspects:(1) The lateral rigidity of tall building follows two principal axises direction and the characteristic of deformation are very alike.

第二部分概述；分为四小结，1）高层建筑结构的对称性、均匀性主要体现在以下四个方面，（1）高层建筑主体抗侧力结构沿两个主轴方向的刚度比较接近、变形特性比较相似。

A specially designed prismoid that generates interference of four beams with binary symmetry is fabricated and optical interference field is observed with an optical microscope.

实验上用光学显微镜拍摄了双模结构的光场分布。

In her mixed media compositions, Chen Jiao (CAP 2006 Gold prizewinner) argues that aesthetics, not science, constitutes the "real" empiricism; revealing the natural proportions and symmetry in natural and man-made structures. 2006 finalist Ye Hongxing celebrates the aesthetics of fusion in her quixotic portraits, blurring the boundaries between the particular and the composite.

陈皎（2006CAP金奖获得者）的作品多以综合材料为媒介，她认为美学而非科学，构成了真正的实证主义；她善于借助自然及人工建筑物体表现自然的比例与对称性。2006届CAP入围艺术家叶红杏在其堂吉诃德式的自画像中描绘了融合之美，模糊了特性与共性的界限。

The most critical events appeared to be the establishment of apical-basal patterns of symmetry,formation of apical meristems,and differentiation and axial change of procambium during the development of cotton somatic embryos.

棉花体细胞胚发育过程中最关键的事件似乎是极性的建立、顶端分生组织的形成以及前形成层的分化和生长轴变化。

It is found that energy density of static sphere symmetry of gravitational field is negative in the sphere coordinates and their energy density is positive definite in the Cartesian coordinates. This result shows that Einstien-Tolman expression of the energy-momentum pseudo tensor in the Cartesian coordinates have reasonable property.

在球坐标系和直角坐标系下我们用Einstien-Tolman表述计算球对称静态引力场的能量密度，发现在球坐标系下能量密度为负，而在直角坐标系下能量密度为正；这样的结果显示了Einstien-Tolman表述在直角坐标系下有其合理性。

A virus strain was isolated from the arthrosis of broiler chickens.The virus was shown to have spherical particles with isometric symmetry,no envelope,double deck capsids,with outer capsid of 75nm,inner one of 50nm in diameter by electron microscopy.The virus was not sensitive to aether,acid and heat.The virus could multiply on the chick embryo fibroblastcell,and could cause syncytial pathologic change with the appearance of cytoplasm inclusion bodies.The challenged chickens of one-day old by nasal,oral,intramuscular and pulvillus injection displayed obvious clinical symptom of severe arthritis and accompanied with pathological changes of malabsorption and necrosis.Meanwhile,four avian reovirus isolates CL,S1133,YH and YB were examined in the cross-neutralization test.

从临床患病鸡关节病料中分离到一株病毒，在电镜下观察到病毒粒子无囊膜，有双层衣壳，外衣壳直径约75nm，内核约50nm；分离病毒株对酸、热有较强的抵抗力，对乙醚不敏感；病毒感染鸡胚成纤维细胞上能产生以融合细胞为特征的CPE；爪垫接种1日龄雏鸡表现出明显的病毒性关节炎临床症状，并伴有吸收障碍型和坏死型的病理变化；血清中和交叉试验表明，该病毒分离株与国内的2株番鸭源呼肠孤病毒分离株和国外S1133呈不同程度的交叉反应。

It is a classic push-pull design , taking care to obtain best symmetry.

这是一个典型的推拉式设计，以获得最好的照顾对称。

A kite is a quadrilateral with one line of symmetry.

风筝是个有一条对称线的四边形。

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％。