查询词典 longitudinal wave

Concerning the polarization coupling between Rayleigh particles irradiated by various polarized plane light wave, we use self-consistent method and dyadic Green's function, with the near-field condition of kR《1, and neglecting retardation, to derive analytical expressions for the transverse and longitudinal components of optical binding forces.

针对不同偏振态平面光波诱导下瑞利粒子间极化耦合作用，运用自洽场方程和并矢格林函数，在kR《1的近场条件下，忽略延迟效应，分析推导了横向和纵向光学束缚力公式。

When I hit the snare drum, the particles on its surface are forced to vibrate. And therefore it causes the air particles to oscillate, which results in the formation of a longitudinal traveling wave. Therefore energy is transmitted in this process. Moreover, according to the Newton's Third Law, the snare drum and my hand are action and reaction pair. Hence, a force which is equal in magnitude but opposite in direction would act on me.

当我用力敲在鼓皮上，其表面粒子产生的振动带动了空气粒子的振动，形成传送能量的行波，并使我的耳膜剧烈震动；而根据牛顿第三定律，鼓皮会施予鼓棍一个方向相反但数值相等的力，并传到我的手中！

As another bold hypothesis, the quark is created by curling a train of longitudinal quantum waves, in which the quantum waves are connected end to end, forming a closed recurring wave ring, namely a complete chain running in a distorted manner that is similar to the human DNA spiral structure.

这里再次大胆假设，夸克是由一个段量子纵波卷曲而成，这列量子波首尾相连，形成一个闭合的循环波环，一个扭曲运转的完整链条，类似于人类DNA的螺旋结构。

On the diagram above, draw a wave pattern to represent the longitudinal waves produced in air between the loudspeaker and the microphone.

关于上面的图解，画纵波在在扬声器和话筒之间的空气里生产的要描述的波型。

Main contents and conclusions obtained in this paper are as follows:The method for the calculation of metacentric height fluctuation is derived for ship sailing in longitudinal and oblique seas, considering the impact of wave profile and assuming quasi-static equilibrium of heave and pitch motions.

本文旨在研究纵浪和斜浪中航行船舶的参激横摇运动问题以及系泊油轮在纵浪中的动力特性和系缆张力的变化特性。

A non-singular single integral mathematical model is adopted to calculate the external intermittent and alternative longitudinal magnetic field acquired by single axisymmetrical and cylindrical hollow coil t which is coaxial to electrode and excitated by a revisable pulsed current of square wave t in austenitic stainless steel GTA welding.

针对奥氏体不锈钢外加纵向磁场的气体保护钨极电弧焊接时，与电极同轴的单个轴对称空心圆柱线圈在双向脉冲矩形励磁电流作用下产生的间歇交变纵向磁场，采用无暇点单积分磁场的数学模型，对＊TAW焊接外加间歇交变纵向磁场进行了数值计算，该方法具有模型简单、计算速度快和精度高等优点并讨论了该间隙交变纵向磁场的分布、磁场的均匀性及其纵向分量与径向分量的比率等规律及其对焊接行为的影响，认为横磁分量将削弱GTAW外加纵向磁场的有利作用，影响磁控电弧的焊接质量

The function of 3dB fiber loop mirror in fine wavelength partition is studied. With this theory, a novel narrow linear band, dual-wavelength switchable Er-doped fiber laser is realized.2. An unpumped Er-doped fiber and broadband fiber Bragg grating with high reflectivity is served as an auto-tracking filter, where the space hole-burning effect appears when the laser signal travels and forms standing wave, thus the generation of multi-longitudinal-mode is suppressed. Then the high birefringence fiber loop mirror is introduced to act as comb-liked wavelength filter.

主要包括：1、发现3dB光纤环镜的精细波长分割作用，并利用这种分割机制，研制成功一种窄线宽、双波长可转换的掺铒光纤激光器。2、利用未受泵浦的掺铒光纤以及宽带高反射率的光纤布喇格光栅做自动跟踪滤波器，当穿行其中的激光信号构成驻波时，出现了空间烧孔效应，从而抑制了多纵模的产生，引入高双折射光纤环镜做梳状波长滤波器。

Finally, travelling wave effect decreases the longitudinal seismic effect of the abutment pier and increases that of the other pier, but it is not noticeable influence on the lateral seismic effect.

第三，行波效应减小了制动墩的纵向地震反应，增大了其它桥墩的纵向地震反应：对桥梁横向地震反应没有影响。

Based on the above theories, some vibration characteristics of longitudinal acoustic horns are analyzed with finite element analysis software ANSYS. Some factors influence to large end amplitude distribution is studied such as big end diameter, length of horn, and diameter ratio of big end to small one. In addition, we carry on analysis and research to resonance frequency of large cross-section acoustic horn, amplitude magnification factor, wave node position of horn, transverse vibration situation and so on, and some related change rules are obtained.

在此基础上，通过有限元分析软件ANSYS对纵向超声变幅杆进行了振动特性分析，研究了变幅杆的大端直径、变幅杆长度、大小端面直径比对大端面振幅分布的影响，并对大截面变幅杆的谐振频率、振幅放大系数、变幅杆的波节点位置，横向振动分布等进行了分析研究，总结了相关的变化规律。

In this paper, by means of finding the solutions of Maxwells equitions which have a tensor dielectric permittivity,the wave equitions were obtained in rotation dielectric under the condition of longitudinal direct current magnetic field.

本文求解张量介质电常数条件下的麦克斯韦方程，导出了纵向场作用下旋光材料的波动方程。由于电场与磁场是互相耦合不能单独存在，因而引入了孪生标量波的概念，并证明了该标量波满足亥姆霍兹方程。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。