力作用在轨枕中间与轨枕上方时，声辐射效率差别极小。
The rail acoustic radiation efficiency has little difference whether the force is on the sleeper or in the middle of the sleeper.
也就是说，要求高的信号保真度，必将导致低的辐射效率。
Thatis to say, to demand high fidelity of signal, it would have to lower the radiation efficiency.
默认的3D远场计算，现在还列出了辐射效率和RDF价值。
Default 3D far-field calculations now also lists radiation-efficiency and RDF value.
作为实例，最后还对简支、固支、自由平板的声辐射效率进行了计算与讨论。
As an example, the radiation efficiency of the simply-supported, clamped and free square plate is computed and discussed in the paper.
由于在中、低频时，声辐射模态对应的辐射效率随着模态阶数的增加而迅速降低。
The radiation efficiency of the radiation modes falls off very rapidly with the increase of modes order at low frequency.
其结果包括阵列单元的输入阻抗、空间波辐射效率、方向性系数和辐射方向图等。
The results for element input impedance, radiation efficiency of space wave, directivity and radiation pattern are presented.
电子在线偏振激光中产生的辐射效率，比在同样强度下圆偏振激光中产生的效率更高；
The radiation produced by the electron under a linearly polarized laser has a higher amplitude than under a circularly polarized laser pulse with the same intensity.
研究发现在中、低频时，声辐射模态对应的辐射效率随着模态阶数的增加而迅速降低。
The radiation efficiency of the radiation modes falls off very rapidly with increasing modes order at low frequency.
以水中有限长圆柱壳体为理论模型，用辐射声功率和辐射效率作为表征量导出了相似律。
Similarity rules were derived for a finite cylindrical shell, characterized by radiated sound power and radiation efficiency.
由于纳米管内电子运动固有的弹道输运效应，使得纳米管阵列天线具有辐射效率高的优点。
The intrinsic ballistic transportation of electrons in nano-tube makes it possible for antennas consisting of nano-tube array to radiate with higher efficiency.
电-磁振子组合型UWB天线集电振子和磁振子于一身，具有尺寸小、辐射效率高的特点。
The electric-magnetic vibrator combined UWB antenna (EMV-UWB) that constructed of electric and magnetic vibrator, has the characters of small size and high radiated efficiency.
提出一种用边界元方法与声辐射理论求解复杂结构的声辐射模态与声辐射效率的理论方法。
A theoretical method to solve acoustical radiation modes and acoustical radiation efficiency of complex structure by a boundary element method and acoustical radiation theory is posed in this paper.
本文提出了一种简便计算置于无限大障板上裂纹薄板水中振动频率和模态辐射效率的计算方法。
A simple method for computing the modal vibration frequencies and sound radiation efficiencies of a thin cracked baffled plate in water is described.
为提高辐射效率和扩展工作带宽，对一种口径耦合馈电的多层介质高温超导微带天线进行了设计。
To increase the radiation efficiency and broaden the operation bandwidth, an aperture-coupled microstrip antenna of high temperature superconductor with multi-layer substrates is designed.
结果表明：（1）圆板的模态声辐射效率在全频段内大体呈现随着振动频率的增高而增大的特点；
The results show that (1) the modal radiation efficiency increases with the increasing of the frequency in the whole frequency range;
本文讨论了矩形脉冲激励的对称驻波天线的能量方向图、总辐射能量、辐射效率和辐射电阻等问题。
The energy pattern, total radiation energy, radiation efficiency and radiation resistance of standing-wave dipole excited by rectangular pulse are discussed.
应用此模型，并结合分层介质中的并矢格林函数，分析了贴片天线的辐射阻抗、空间波辐射效率等特性。
Using this model and the relevant dyadic Green's function, some characteristics of a rectangular patch antenna near resonance, such as radiation resistance and space wave efficiency, are analysed.
编制了发动机表面或其他机器表面辐射效率计算机程序，并提出了固定支承边界和带加强筋平板的处理方法。
The computer program for calculating radiated efficiency of engine or of other machine surface has been compiled and treatment of Clamped boundary conditions and ribbed plates are proposed.
数值结果表明，金属栅厚度对漏波天线波求方向影响较小，但对漏波天线的辐射效率和波束宽度有明显的影响。
Numerical results show that the effect of metallization thickness is smaller on the direction of main beam and very noticeable on the beamwidth and aperture efficiency.
解释了现有文献中测量结果不一致的现象。同时说明了超声波向油层的辐射能量少、因而辐射效率不高的原因。
The disagreement of various experimental results in present references and the causes of lower radiation efficiency of ultrasonic energy were explained.
利用有限元、边界元和统计能量分析方法并结合软件对圆柱壳体在流场中受激振动及声辐射效率作了数值计算分析研究。
Numerical analysis of vibration and sound radiation efficiency from a submerged cylindrical shell has been carried out by using FEM methods, BEM methods and statistical energy methods.
从真空中模态特征频率出发用迭代法直到水中频率收敛为止而得到水中方板的特征频率，进而计算了方板的棤态辐射效率。
Moreover the vibration frequencies of the plate are computed using iterative method, which begins with the in vacuo eigenfrequency and continues until in-water eigenfrequency con-verges.
然后结合SYS-NOISE软件和AUTOSEA软件分别计算壳体在流场中声辐射效率在低频段和高频段时的频率响应。
Then, the radiation efficiency at low frequency and frequency response at high frequency in fluid are computed respectively by both SYSNOISE software and AUTOSEA software.
采用表面振动法进行了柴油机表面辐射噪声的诊断，并对附加自由和复合阻尼的薄壁件进行了声辐射效率试验研究和整机试验。
The experiment of sound radiation efficiency and engine noise test were carried out when the engine was equipped with thin-wall components with free and compound damping.
阵列天线辐射单元采用空气介质的微带贴片天线，辐射效率高；阵列天线的馈线网络采用低损耗的空气带状线形式，降低了馈线损耗。
The radiating element of array antenna is air dielectric microstrip patch antenna, which has high efficiency, and the feed network is low loss air strip, which can reduce the loss of the feed line.
阵列天线辐射单元采用空气介质的微带贴片天线，辐射效率高；阵列天线的馈线网络采用低损耗的空气带状线形式，降低了馈线损耗。
The radiating element of array antenna is air dielectric microstrip patch antenna, which has high efficiency, and the feed network is low loss air strip, which can reduce the loss of the feed line.
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