查询词典 beam-focusing

We have proved experimentally and theoretically that OBNC PM is more interesting than collinear PM in OPA and OPO due to its two characteristics: noncriticality for the noncritical beam and collinearity of the propagation directions of energy of the noncritical beam and pump beam in the crystal.

OBNC过程中作用光波中的一个光束与所产生谐波光束是非临界的，并且它们的能量流方向是一致的；OBNC具有很大的容限角，而其匹配条件比共线匹配过程宽容得多，从而可以使现有的多种非线性光学晶体通过OBNC获得比共线情况更有效的非线性作用。

Ponderomotive force of laser beam propagating in plasma could become stronger as the intension of laser beam strengthening , and in fluid mechanics ponderomotive force is related to implicate term, so implicate term could become stronger as laser beam's strengthening and couldn't be ignored.

当在等离子体中传播的激光脉冲达到一定强度时，有质动力会变得比较强。而在流体力学方程中有质动力一项与牵连项相关。因此当激光达到一定强度的时候，流体方程中的牵连项也会变得比较强，不可以被忽略。

Since the strong ground clutter processing residual on the low beam position caused by the sequential scanning of the beam in radar elevation is used as ground clutter and it appears in high beam position skippingly,this will affect radar normal dete.

由于这种雷达俯仰面波束的时序扫描而产生低波位的强地物回波处理剩余，作为地物杂波在高波位时跨周期出现，影响雷达系统正常的检测与显示，为解决此问题文中提出了一种比较有效的处理方法。

The beam end displacement of beam-column subassemblage may be looked as the superposition of three parts deformation that column deformation, beam deformation, and joint deformation.

组合体梁外端挠度可看作是柱段变形引起的梁外端挠度、梁段变形引起的梁外端挠度以及节点区变形引起的梁外端挠度三部分的叠加。

A metastable helium atomic beam effused out of atom source is firstly cooled transversally by laser. This well-collimated atomic beam traveling through the light standing-wave whose direction is perpendicular to atomic beam is quenched, and channeling effect happens in atomic density distribution.

亚稳态原子束从原子源喷出后首先对其进行横向激光冷却，准直后的原子束穿过与之垂直的激光驻波场时发生淬火过程，原子的密度分布出现沟道化效应，给出基于光掩模制作纳米图形的基本原理、理论分析及模拟结果。

The separation angle about beam and beam is depended on the vice structure angle:the design of splitting Li P prism is better about the need of beam vertical out;the design of splitting Grand · Thompson prism is better about the need of big splitting angle .

出射的 光与光的分离角与副结构角有关；对于光垂直出射的需要，选用分束李普奇棱镜设计为好；对于大分束角的需要，选用分束格兰·汤普逊棱镜设计为好。

It is suggested that the internal forces of anchor frame beam to be calculated with Winkler foundation beam and semi-infinite elastic theory. At the same time the pertinent proposal for designing frame beam is offered based on an actual project.

结果表明：框架梁的设计完全依据膨胀力是欠合理的，建议采用Winkler地基梁和半无限弹性体理论计算框架梁的内力，并结合工程实例，提出了相关的建议。

Key words:big space; composite box; net beam ceiling; rib beam; board uniting with beam; polymerization cement slurry

关键词］大空间；叠合箱；网梁楼盖；肋梁；梁板合一；聚合水泥浆

Measurement of radial and azimuthal current density on the beam cross-section in different time and energy fluence on beam spot center with 13% more than its average value for the beam is also presented.

测量还给出了不同时刻束截面上的径向和角向束流密度分布，而束斑中心处的能注量高于平均值约13%。

The setup of a time-resolved measurement system and a data processing method for determining the beam center position are introduced for the purpose of obtaining Dragon-Ⅰ electron beam trajectory including beam profile.

针对具有时间分辨的电子束质心位置的测量和确定，介绍了测量实验系统的建立和数据处理两个方面的研究工作。

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。