查询词典 wave-guide

Human origins the study of light early, but the understanding of the nature of light has gone through a more lengthy process, the light is actually the wave or the granule, the struggle of the light wave theory and the micellar theory started from the early 17th century,and comes to an end by the light wave-particle duality to the early 20th century.

人类对光的研究起源很早，但对光的本质认识经历了一个较漫长的过程，光究竟是波还是粒子，光的波动说和粒子学说之争从17世纪初开始，至20世纪初以光的波粒二象性告终。

Results Abnormal rate of brain CT was 59.3%, including expansion of ventricles of brain, atrophy of cortex, cerebromalacia; abnormal rate of EEG was 72.2%, including low voltage, allorhythmia of slow wave, deletion of sleep-spindle wave and attack wave.

结果脑CT异常率为59.3％，主要表现为脑室扩大、皮质萎缩、脑软化；脑电图异常率为72.2％，多表现为低电压、慢波节律异常、睡眠纺锤波缺失及发作波。

In this paper, the wave heights in front of a vertical wave absorbing structure with rubble foundation aswell as in the wave chamber by using an approximative calculation method are described, and the dissipating effect of the structure is verified.

本文采用近似方法分析了明基床上直立式消波建筑物前的波高及消波室内的波高，从而确定建筑物的消波效果。

When the gas flux is constant, the ratio of reduced resistance is improved with the increase of the water stream velocity. However, the relationship between the gas flux and the ratio of reduced resistance is more complex. When the water stream velocity is constant, if the gas flux is small in contrast, the effectiveness of reduced resistance is not obvious. But when the gas flux increased, the jetted gas will form """"archform"""" which will augment the shape resistance. In this condition, resistance could not be reduced and could even be increased, if the gas flux continues to be increased. So that there needs setting a baffle called step, which introduces the jetted gas into the turbulence boundary layer. In this case, the shape resistance may be fairly great. Besides, the waterline of model has also some effect on the ratio of reduced resistance, which acts on the size of wave. If waterline is deep, the wave could not affect the deployment of microbubble layer, so there is almost no effect on ratio of reduced resistance. However, the wave would affect distributing of microbubble layer under the model so that the gas could leak out from the two sides of model and directly affect the ratio of reduce resistance if the waterline is very small. Whether installing the dashplate or not has also the great influence on the effectiveness the ratio of reduced resistance. From the results of experiment, conclusion is that adding dashplate will greatly improve the effectiveness of reduced resistance.

当喷气量一定时，水流速度增大，减阻率提高；喷气量与减阻率之间的关系比较复杂，速度一定时，如果喷气量较小，减阻效果就比较差，但当喷气量增大的话，喷射出的气体就会形成一个&拱度&，增加了船模的形状阻力，在这种情况下最好采取断阶喷气，把气体引入到湍流边界层中，在这种情况下，船模的形状阻力比较大；船模的吃水对减阻率也有一定的影响，主要表现在波浪大小上，如果吃水较深，波浪影响不到微气泡层的分布，对减阻率不会造成太大影响，如果吃水较浅，波浪就会影响到微气泡层在船模底部的覆盖情况，可能会有部分微气泡从船模两侧泄漏，这样就直接影响到了减阻效果；是否安装压浪板，对减阻率也有较大的影响，从试验结果可以看出，在船模尾部加设了压浪板时，减阻效果明显得到改善。

Cross-dipole Acoustic Logging is the best measurement of the formation wave-slowness,amplitude and attenuation coefficient of the compressional,shear and Stoneley wave types that may occur in array acoustic waveform data.Further more,it has special superiority in the evaluation of shear-wave azimuthally anisotropy.

0引言在柴达木盆地交叉偶极子声波测井主要有以下方面的用途：纵横波、斯通利波的提取，地层各向异性分析和斯通利波渗透性分析，并且可以根据地层岩石动态力学参数的计算方法进行储层动态力学参数的计算和估计，指导工程施工。

When form solid film, cavitate bladder blow up in ultrasonic power, bring thousands K high temperature in the thumbnail time and the thumbnail spare, go with strong bow wave and mirshoot flow, it can intensify the process of mass transfer, so reaction rate with ultrasonic wave have higher than without ultrasonic wave.

固态膜形成后，在超声波作用下空化泡崩溃，在极短时间内和极小空间中产生几千K的高温，伴生强烈的冲击波和微射流，强化传质过程，因此在超声波作用下磷矿的分解率比无超声作用时的分解率高。

In chapter 2, the intensity and phase formulae of five photorefractive processes in intermediate regime are derived including the analytic expressions of codirectional parallel-or cross-polarization two-wave mixing in the depleted pump condition and the analytic expressions of contradirectional parallel-or cross-polarization two-wave mixing and degenerate four-wave mixing in the undepleted pump approximation.

给出了本文的结构和取得的主要结果。第二章推出了五种光折变过程的中间段强度与相位公式。既同向平行、交叉极化双光束耦合的大信号解析公式，异向平行、交叉极化双光束耦合以及简并四波混频的小信号解析公式。

In this paper,by numerical calculation, the effect of gas saturation on dispersion of model waves,excited spectrum of compressional wave and shear wave and full wave of acoustic logs in cased boreholl are discussed.

通过数值计算讨论了气体饱和度对声测井曲线的模式波的频散特性、纵波和横波的激发特性、全波波形的影响。

Three seismic waves illustrated in this paper refer to reflected compressional wave, refracted compressional wave and Rayleigh wave.

3种波指的是反射纵波，折射纵波，瑞雷面波。

The results are in good agreement with the experimental results.(2) According to the obtained relation between electromagnetic wave and incident stress wave and the resolution of the transmitted coefficients in the joint,the strength variation of the EME before and after the joint when the normal incident stress wave propagates to the linear deformative joint has been presented.

2依据所得到的电磁波与入射应力波之间的关系及应力波在节理面处的透射解，获得垂直入射应力波作用下产生的电磁波在线性变形节理面前后的强度关系。

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。