Thatis to say, to demand high fidelity of signal, it would have to lower the radiation efficiency.
也就是说，要求高的信号保真度，必将导致低的辐射效率。
The radiation efficiency of the radiation modes falls off very rapidly with increasing modes order at low frequency.
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。
Proper impedance load can reduce RCS effectively, meanwhile antenna's gain and radiation efficiency are not affected.
适当的阻抗加载能有效降低天线rcs，同时还能保证天线的辐射性能。
The radiation efficiency of the radiation modes falls off very rapidly with the increase of modes order at low frequency.
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 results for element input impedance, radiation efficiency of space wave, directivity and radiation pattern are presented.
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。
Similarity rules were derived for a finite cylindrical shell, characterized by radiated sound power and radiation efficiency.
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。
The rail acoustic radiation efficiency has little difference whether the force is on the sleeper or in the middle of the sleeper.
力作用在轨枕中间与轨枕上方时，声辐射效率差别极小。
The results show that (1) the modal radiation efficiency increases with the increasing of the frequency in the whole frequency range;
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；
As an example, the radiation efficiency of the simply-supported, clamped and free square plate is computed and discussed in the paper.
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。
The disagreement of various experimental results in present references and the causes of lower radiation efficiency of ultrasonic energy were explained.
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 energy pattern, total radiation energy, radiation efficiency and radiation resistance of standing-wave dipole excited by rectangular pulse are discussed.
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 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.
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。
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.
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。
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.
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。
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.
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。
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.
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。
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.
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。
Various studies have been made to attempt to itemize the energy flow of an entire ecosystem, taking into account factors such as incoming radiation, photosynthetic efficiency, etc.
为了详细说明整个生态系统的能量流，考虑了外来辐射、光合效率等等因素，已经进行了很多不同的研究。
In order to increase the efficiency of heat energy convection and radiation, a porous flat plate is vertically placed in the high-temperature flowing system.
在高温流动系统中，垂直放入多孔平板可增强辐射换热效应，提高能量的利用率。
Finally, transient temperature distributing is simulated. thermo - soakback phenomena, electrical heating efficiency of catalyst bed and outer space radiation are analyzed.
分析了热回浸现象、催化床电加热效能以及外空间辐射换热等问题。
The way to reduce radiation level of experimental hall is very important for suppression of radiation background of BES and improvement of detection efficiency.
降低厅内的辐射水平是减少BES的辐射本底和提高BES探测效率和“信噪比”的重要途径。
Default 3D far-field calculations now also lists radiation-efficiency and RDF value.
默认的3D远场计算，现在还列出了辐射效率和RDF价值。
The simulation shows that the transfer efficiency, stored energy density distribution and uniformity of the pump radiation are dependent on the pumping cavity geometry.
模拟结果表明，光传输效率、储能密度分布和泵浦均匀性与泵浦腔几何构形有关。
Meanwhile, the ultrasonic radiation force method is used to get the higher adhering efficiency for the targeted micro-bubble contrast agent, which will improve the imaging quality.
同时采用超声辐射力法以增加靶向性微泡造影剂在血管壁上的黏附效率，改善成像的性能。
Radiation cure coatings have the features of high efficiency, energy-saving and pollution free.
辐射固化涂料具有高效、节能、无污染的特点。
A gas radiation burner for improving the efficiency of burning by promoting mixing of fuel gas and air is disclosed.
本发明涉及一种用于通过促进燃料气体和空气的混合而提高燃烧效率的气体辐射燃烧器。
In this paper, the equations for calculation of the radiation performances on high efficiency double reflector antenna fed by beam waveguide are derived.
本文导出了地面站常用的改进型波束波导馈电高效率双镜天线的辐射特性的计算式。
The utility model is a laser therapeutic equipment with large laser radiation area, high therapeutic efficiency and applicability to treatment of large focal area or wound surface of human skin.
本实用新型是一种激光辐射面积大、治疗效率高、特别适用于治疗人体皮肤大面积病灶区或创面的激光治疗机。
In the radiation dose range used, the colony efficiency of the lymphocytes was negatively correlated to the radiation dose, while the HPRT mutation frequency is positively correlated.
在一定剂量范围内，人外周血淋巴细胞克隆效率与照射剂量呈负相关，HPRT基因突变频率与照射剂量呈正相关。
The results show that the degradation efficiency of DBS increases with the accretion of radiation dose of gamma rays and the degradation reaction of DBS seems following first-order kinetic.
结果表明，丁硫醚的去除率随辐射剂量的增加而上升，去除反应符合一级动力学；
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