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- noise radiation pattern 噪声辐射图
- Noise radiation is limited by control of the output current slew rate. 控制输出电流上升速率可限制噪音。
- To predict the rail s noise radiation, the receptance analysis model of the track system is built in this thesis. 为了预测钢轨辐射的滚动噪声,本文建立了轨道系统模型计算钢轨的导纳,在模型中,钢轨采用三维实体单元模拟,轨枕采用弹性梁单元模拟。
- The frequency response of radiation pattern of a linear dipole antenna by Hertz dipoles field summation approximation. 分析赫芝偶极电磁场合成法计算偶极天线之辐射场型随频率之变化。
- Vibration isolating theory is adopted as a measure of reducing diesel engine's noise radiation. 介绍了隔振作为柴油机降噪方法的基本原理,描述了该方法实施的基本步骤。
- Planar Radiation Pattern Comparison only for Consistent Source Current Direction, Field Polarization, and Field Plane. 作平面场型比较之电流源方向、电磁场极向、及场平面均必须一致。
- It is also shown that the MBEM is expected to have good prospect in the movable boundary problem of noise radiation. 作者认为混合边界法在处理这类动边界声辐射问题上有着很好的应用前景。
- Cosecant Beam Generation Program for computing Phase distribution function and Radiation pattern. (译)：余割波束生成程序的计算相分布函数和辐射模式。
- Rotating Radiation pattern from a Linear Array complete source code, has been tested. (译)：旋转辐射模式从线性阵列完整的源代码，已经过测试。
- On the basis of the theory of vehicle-track coupling dynamics and noise radiation and propagation, mechanism of wheel/rail noise is analyzed. 根据车辆-轨道耦合动力学理论及声辐射与传播理论，分析了列车运行过程中产生轮轨噪声的机理。
- The work includes several types of antenna measurements like efficiency, radiation pattern, VSWR and SAR. 负责一些天线指标的测试。例如，天线效率，辐射，VSWR，SAR等。
- Vibrations of the tire surface due to road impact excitations cause noise radiation in the frequency band typically below 500 Hz. 振动轮胎表面由于道路造成噪音影响激发辐射的频带通常低于500赫兹。
- One of the effective solutions to the suppression of noise radiation from the water piping system is to install silencers. 在水管路系统中,安装水消声器是降低管路系统辐射噪声有效方法之一。
- It incorporates the spherical nature of the radar's radiation pattern and so the image would not distort even at near field. 这种方法考虑到了波前的球面特性,所以即使在近场条件下,也不会像传统方法那样由于采用了平面波近似而使图象畸变。
- A calculation method and calculation results that show that a new kind of shaped paraboloid antennas can produce a ringy radiation pattern is presented. 摘要通过数值计算发现：将抛物线绕通过焦点的非抛物线对称轴旋转而形成的赋形抛物面天线可产生环状的方向图主瓣（此主瓣指的是主瓣最大值处）。
- Verification of differences of characteristics of electromagnetic field image and radiation pattern in the near and far field are demonstrated. 验证电磁场影像及场型特性在近场与远场中之差异。
- The results show that the main noise source is the fuel cell auxiliary system while roof panel and rear quarter panel are the key parts contributing to noise radiation. 其总布置和噪声源有别于传统汽车，为了提高乘坐舒适性，很有必要研究其振动噪声特性。
- The radiation pattern in the near and far field of each frequency component of the spectrum of current pulse on a transmission line. 传输线上脉波电流频谱中各频率成份在远近场区中场型之比较。
- The noise radiation of internal combustion engine block was calculated by multi-body system simulation (MSS), finite element method (FEM) and boundary element method (BEM). 摘要结合多体动力学仿真技术与有限元法(FEM)和边界元法(BEM)对一台4缸发动机的机体噪声辐射进行了预测。
- A new method to determine the mode content in over-moded rectangular waveguide by radiation pattern and Genetic Algorithm (GA) was presented. 摘要提出了一种基于辐射场和遗传算法分析矩形波导中工作模式的新方法。
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- 深远海浮式风电平台 - deep-sea floating wind power platform
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- 京雄高速公路 - Beijing-Xiongan expressway
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- 农业及相关产业增加值 - the added value of agriculture and related industries
