导波

The quantum conductance can be largely reduced by interference when there is mismatch between the Fermi wave vector and the atomic lattice along the circumferential direction.

当相邻缺陷沿周长方向的距离与费米波矢长度不匹配时，体系的量子电导因为波函数发生相消干涉而被极大的降低。

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。

Here, a difference between transmittances of P and S wave of polarized light having passed through the polarizing coating layer from the light guide panel body is at least 50% in a visible light area.

此处，在可见光区域内，从光导板主体穿过偏振涂层的偏振光的P波和S波的透射率之差至少为50％。

A new catalytic kinetic method with second derivative oscillopolarography detection for determining trace amounts of NO〓〓 has been developed. The method is based on the catalytic oxidation of Amarath by potassium bromide in the diluted H〓SO〓. The detection limit of the method is 2.8×10〓g/ml, the linear range of the determination 〓is 0.6～14ng/ml for NO〓.

首次研究了鸡冠红的示波极谱行为，并发现NO〓〓在稀硫酸介质中对KBrO〓氧化鸡冠红褪色反应具有强的催化作用，本文采用两阶导数示波极谱法作监测技术，测定了该催化体系的表观反应级数及动力学方程，建立了催化动力学伏安法测定痕量NO〓〓的新方法。

An analytical model for tunneling transmission through a high—frequency potential barrier in a ballistic channel is formulated.

不仅是量子波导中的传播态决定其弹道输运的过程，衰减态在电子波传播中的作用也是不可忽略的。

In this paper,an algorithm based on wavelet transform has been developed for detecting QRS complexes of signed-lead electrocardiogram signal.

介绍了一种使用小波变换对单导联心电信号QRS复合波进行检测的方法。

In chapter 4, the in situ measurement system composed of the six-port reflectometer and the coaxial probe is introduced and some guidelines for in situ measurement is highlighted.

第二章建模和计算先对建模方法和反演方法进行了概述，然后建立了同轴探头的谱域全波模型，着重讨论了伽辽金矩量法求解积分方程有关的积分计算问题，分析了同轴探头高次模式的影响，最后给出了波导探头的谱域模型。

With the id￠=0 vector control and the feedforward compensation of cogging, the minimum force ripple and maximum efficiency control of non-sinusoidal BEMF SPM motors can be obtained.

考虑永磁磁链谐波对永磁磁链导数矢量幅值及相位的影响，通过引入d￠q￠轴坐标系，提出一种id￠=0的非正弦波BEMF SPM电机矢量控制新方法，结合齿槽前馈补偿可以实现非正弦BEMF SPM电机的最小推力纹波最大效率控制。

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。