查询词典 symmetry

The double volute with 180° symmetry is widely used in large centrifugal pumps.

180°对称分布的双蜗壳结构在大型离心泵中应用广泛，但目前对双蜗壳内部流动规律的数值研究还相对较少。

Another feature is the weak interaction symmetry low.

弱相互作用的另一个特点是对称性低。

In chapter 3,we construct a new type of graph T with weak symmetry and compute the minimum genus of it.

第三章构造了对称性比较弱的新图类T且得其最小亏格。

Owing to the geometrical symmetry of microdisk cavities, they support whispering gallery modes in which light circulates around the periphery of the structure and is confined by total internal reflections at both the sidewall and the top and bottom surfaces of the MD.

在微碟共振腔圆柱对称的结构中，电磁场藉由在碟缘墙面上全反射环绕而形成共振，产生所谓的WGM模态，透过湿式蚀刻，让微碟上下表面暴露於空气中，使相对折射率差异大，因而场型更能够对称地被局限在微碟共振腔内。

The analysis results show the effect of non-symmetry film force, nonlinear stiffness and nonlinear friction force on dynamical behavior of rotor system has great relation with rotation speed. The chaotic behavior could exist in a widder parameter region, and the chaotic evolutive rule is more complicated.

发现非对称油膜力、非线性刚度和非线性摩擦力对转子系统动力学行为的影响与转速有很大关系，碰摩转子系统可以在较大参数范围内出现混沌运动状态，并且混沌运动的演化规律更为复杂。

The strain distribution in QD structure of wurtzite crystal symmetry is included.

研究了量子点的子带跃迁，及其受到量子点大小变化的影响。

The crystalline structures of the film materials are highly c-axis oriented wurtzite symmetry.

随着烧结气氛中氧含量的减小，薄膜的沿c轴生长的趋势加强。

This dissertation concentrates on the application of symmetry in the design of Dammann gratings for controlling of the zero order's intensity and higher order's intensities.

本论文将镜像对称结构引入达曼光栅，设计出反转对称型达曼光栅，并对多值位相达曼光栅进行了理论设计，其主要内容如下： 1。

In the paraelectric- antiferroelectric phase transition of antiferroelectrics lead zirconate (PbZrO 3),the symmetry of crystalloid changes.

在反铁电晶体锆酸铅(PbZrO3 )顺电反铁电相变中，伴随有对称性的变化。

Simply inferred the optical-rectification effect in the silicon, discovered the optical electric voltage aeolotropic rule through the experiment of observing the relation between the optical electric voltage and the light wave direction of polarization and the orientation of crystal changing when the Si/Al schottky barrier has been illuminated, and confirm the reason is that the existence of self-field destroy the crystal symmetry, produce second-order nonlinear optical-rectification effect, and the direct-current field which has been produced by the optical-rectification effect and the self-field affect mutually.

推导了硅中的光整流效应，并通过观测Si/Al肖特基势垒受光照时产生的光生电压与光波偏振方向和晶向的变化关系的实验，发现了光生电压的各向异性规律，并确定这是由于内建电场的存在使晶体对称性被破坏，产生二阶非线性效应的光整流，光整流产生的直流电场又与内建电场相互作用的结果。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。