导波

Its Nonlinearity holds at 160 degree C, it is one of the materials that have the best thermal stability. 3. polarization inversion films that consist of melamine formaldehyde resin and polymer/silica hybrid material were fabricated, a simulation model for calculating frequency doubling from multi-layer waveguides was established.

是迄今为止所发现的热稳定性最好的光学基质材料之一。3、利用密胺材料和聚合物/氧化硅复合材料最佳极化温度的差异，制备出重复性好、有较好热稳定性的极性翻转薄膜，并建立了多层波导结构光倍频计算模型。

When light transmitting through two interfaces of wave-guide, the luminous energy of coupling losses great for the condition of Snell Law, which restricts the wide application of coupling more optical elements. It has obstructed the development of the integrated optics.

光线透过两波导界面传输时，由于受到Snell定律的制约，光能的损耗很大，导致三个元件以上的集成光路不能走向应用，阻碍了大规模集成光路的发展。

When light transmitting through two interfaces of wave-guide, the luminous energy of coupling losses great for the condition of Snell Law, which restricts the wide application of coupling more optical elements. It has obstructed the development of the integrated optics.

但是由于光线在透过两波导界面传输时，受到Snell定律的制约，光能耦合损耗很大，导致三个元件以上的集成光路不能走向应用，阻碍了大规模集成光路的发展。

In the antenna system, a dual-reflector antenna with two paraboloids is fed by the beam waveguide feeding system formed by three reflectors, realizing quick scanning of the beam.

该天线利用由三面反射镜组成的波束波导对一个由两个抛物面镜组成的双反射面天线进行馈电，实现了波束的快速扫描。

Based on the results of the theory analysis and computer simulation of ratrace, Waveguide-to-Microstrip Probe Transitions, DGS lowpass filter, the structure was designed and manufacture was made.

在对所用到的功率混合电路，波导－微带探针过渡，以及DGS低通滤波器进行理论分析、计算、和计算机仿真的基础上，制作混频器，并对设计结果进行了测试验证。

We find that the localized waveguide transmission peak redshifts and becomes broader along with the layer distance D increasing.

本工作发现随着板间距D 的增大，局域波导共振峰发生红移，同时峰的宽度明显变宽。

So the researches on the characteristics of tropospheric ducts environment, propagation and its applications have great theoretical significance and its applications have great theoretical significance and are of great value to military.

因此开展大气波导环境中电波传播特性及其应用的探究具有重大的理论意义和军事价值。

In this paper,the cylindrical plasma-loaded Cerenkov FEL is studied usingfluid theory.

本文用磁流体理论研究了柱形波导填充等离子体的切伦柯夫自由电子激光器，表明该系统比普通切伦柯夫自由电子激光具有更高的工作频率和线性增长率。

It is shown that its working frequency and linear growth rate are higher than thatof common Cerenkov FEL,and for the same injection current,the linear growth rate of thissvstem and common Cerenkov FEL either decrease with increase of the gap between the dielectricand electron beam or there is an optimum gap value corresponding tO the maximum growth rate.

发现在入射电流和波导结构一定时，该系统和普通切伦柯夫自由电子激光器的增长率并不是随随电子束与介质的间距的增加而减小，而是存在一个最佳值。

Cherenkov radiation in a plasma-filled dielectric coaxial waveguide.

填充等离子体的介质同轴波导中的切伦科夫辐射。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。