波导

The numerical results show that lossy dielectric-load can heighten the start oscillation current of absolute instability, and increase depends on the magnetic field strength and the perpendicular-to-parallel velocity ratio of the electrons; The thickness of the lossy waveguide increases the start oscillation length of backward wave oscillation.

结果表明：损耗介质的加载，可以提高绝对不稳定性起振电流，提高的幅度依赖于工作磁场偏离饱和磁场的程度、电子束横纵速度比等；增加波导损耗介质加载的厚度，可以提高竞争模式的回旋返波起振长度。

At present, there are many diagnostic model of the evaporation duct, such as P-J model, MGB model, NPS model and Babin model etc. They are based on Monin-Obukhov similar theory, just it is different that confirms the flux and character scale in the surface layer. These models are only applied for the normality and homosphere in open sea without considering the alongshore effect.

目前国内外蒸发波导诊断模式有P-J模式、MGB模式、NPS模式、Babin模式等，但其基本原理都是依赖Monin-Obukhov相似理论，只是用于确定近地层通量的和特征尺度的方法不同，且仅适用于定常和水平均匀的开阔海域，并没有考虑到蒸发波导的近岸效应。

Moreover, the convergence of EP flux indicates that the stratospheric sudden warming is the result of anomalous planetary wave propagation along the high latitude waveguide and its interaction with mean flows.

通过对EP通量进一步的研究表明，平流层爆发性增温是沿高纬度波导传播的异常行星波与平均气流相互作用的结果。

On the interannual timescale, two waveguides of planetary waves in the northern winter have antiphase oscillation. On the one hand, this interannual oscillation has an interaction with the Northern Annular Mode. On the other hand, it exerts influence on the climate anomalies over East Asia.

在年际时间尺度上，冬季行星波两支波导的变化存在反相关的振荡关系，这种年际振荡一方面影响了北半球环状模的位相，另外一方面导致了东亚地区的气候异常。

The power-dependent complex dispersion relations for TE and TM waves in a lossy nonlinear guiding system with a wide range of absorption coefficients are simulated and analyzed.

模拟和分析了很宽吸收系数范围内非线性有损耗波导系统TE和TM波与功率有关的色散关系。

In this thesis, terahertz transmission properties through three kinds of simple sub-wavelength metallic structures, including single sub-wavelength metallic circular hole, single sub-wavelength metallic slit and double sub-wavelength metallic slits, are experimentally investigated in the far field by using our own THz time-domain spectroscopy system and are theoretically analyzed. Conclusions are obtained as follows:(1) a single sub-wavelength metallic circular hole exhibits the same terahertz transmission properties as that of round metallic waveguide, which are influenced by the diameter of circular hole and the thickness of metal foil.

本文利用本实验室搭建的太赫兹时域光谱系统研究了太赫兹波段金属亚波长结构的透射特性，其中对三类金属亚波长简单结构即单个金属亚波长圆孔、单个金属亚波长狭缝和金属亚波长双缝的太赫兹透射现象进行了远场探测以及理论上的分析，得到了以下一些成果：(1)太赫兹波通过单个金属亚波长圆孔的传播现象与圆形金属波导具有相同的规律，其特性受到圆孔直径和金属箔厚度的影响。

For investigating the performance of our method, it has been evaluated to simulate a uniform segment of rectangular waveguide. The more lower fictitious return wave loss, which is lower -10 dB than the one yielded from the first order absorbing boundary condition, is illustrated in our method.

通过对一段均匀直波导的计算，验证该算法比使用一阶吸收边界条件的时域有限元法，虚假剩余反射回波平均要低10dB以上，达到了工程计算的要求。

We using the Si substrate has 200μm thickness SiO because of its low absorbing and scattering, so it could be the anti-reflection layer;it also has well-variable refractive index、well-transmittal and well-heated stability of JSR THB-120N negative photoresist which we choice to be materials to develop the polymer waveguides.

选择具有成长200μm厚度的二氧化矽之矽晶片作为实验所需之基板，因为二氧化矽对光具有低本质吸收及低散射性等特质，故可作为所设计之抗反射层；所使用的光阻为JSR THB-120N来作为制作高分子波导的材料，它具有可调折射率、良好的导光性以及良好的热稳定性等。

Therefore it has all-importment significance for the further study in the product packing common technologyAccording to the idiographic demand of some modules,the paper groped technology of the design of waveguide window and packing,material with high thermoconductivity,completed the study of the seal joint in waveguide window and in module seal joint components,settled the puzzle in production,the technology target attained GJB548A-96 provisions.

本文根据某型模块的具体要求，探索窗口设计与封装、高热导材料封装技术，完成了波导密封窗口和模块密封部件的研究，解决了生产中的难题，技术指标达到了GJB548A-96的相关规定的要求。

At the sametime, the guided wave in the waveguide will be totally reflected as theinterface of the waveguide.

实现了对波导中的导模的逐个激励，并用软件实时在电脑中显示其耦合的同步角。

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。