导波

ABSTRACT The theory and algorithm of the arbitrary three-dimensional discontinuities in rectangular waveguides is developed.

本文研究矩形波导内任意三维不连续性分析的理论和算法。

This kind of coupling waveguides can decrease the coupling loss between the optical fiber and photonic crystal structure.

这些耦合波导能够降低光纤和光子晶体结构之间的耦合损耗。

This paper presents the method of computation for waveguides partially filled with dielectric by using finite-difference time-domain method.

给出用时域有限差分方法计算电磁场问题的差分格式，详细介绍了FDTD法分析介质填充波导截止频率的计算过程。

Finally, the effect of spin coating polymer film error to the attenuator was simulated. Three kinds of errors were considered, which were film thickness, waveguides width and angle of Y branch.

最后，考虑了旋涂法成膜及光刻对器件形成造成的宏观误差，模拟了薄膜厚度，波导宽度和Y分支角钝角给器件性能带来的影响。

The performance of the splitter with different taper structure is analyzed and simulated with two-dimensional beam propagation method (2D-BPM). A novel Y branch splitter is simulated and designed through Beamprop software of Rsoft Company.

本文采用二维光束传输法，利用Rsoft公司的Beamprop软件对Y分支结构功分器进行改进，对各种改进型Y分支设计比较分析，得到优化改进的Y分支波导多模光功分器。

Consideration is attended to the working conditions of chopper with reverse conducting thyristors.

着重分析了逆导斩波器的工作条件，提出了减轻换流和动态工作条件的具体措施。

For the first time the concept of using a standing-wave method to analyze the Bragg resonators is proposed.

全面、系统地导出了轴对称渐变波导开放式谐振腔中高频场满足的普适方程，首次考虑了为前人所忽略的TM型寄生模式的影响，应用于渐变复合腔并分析了多种情况下这种影响的程度。

The design of a large aperture slot antenna for harbor radars is studied in this paper.

本文仅就港口雷达大口径波导裂缝天线的设计进行探讨。

Bird became a pilot at an early age due to the encouragement of his father.

波导成为飞行员在早年由于他父亲的鼓励。

The effect of metallic pit prop on transmission characteristics in tunnel is studied.

针对矩形巷道中由于金属支护立柱的存在而带来的分叉不连续问题，提出用分叉波导模型并用模式匹配法和多模传输理论分析传输特性。

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。