A new method for analyzing the Radar Cross Section (RCS) of a complex scatterer is put forward in the paper, which is a method of frequency characteristic extrapolating.
本文提出了一种新的复杂散射体雷达散射截面(RCS)的分析方法——频率特性外推法。
Cross spectrum estimation based on a single vector sensor has turned random process in time domain into random variables in frequency domain.
单矢量传感器的互谱估计，将时域随机过程变换成了频域随机变量。
An offset cross structure for supporting secondary mirror is proposed. The structure has a higher resonance frequency so it can be applied to large-aperture telescope.
提出了次镜支撑的偏置十字型中心结构，该结构具有较高的谐振频率，因此可以用于大口径望远镜中。
If the cross terms of the spatial frequencies for the unit cell of periodical object are much smaller than the main frequency terms, the restriction of the Angle is not necessary.
当周期物体的单胞空间频率交叉项比主频率项小到可忽略的程度时，角度限制失效。
Cross Well seismic signal frequency is usually several times of the surface seismic or more, can reach hundreds of Hertz.
井间地震信号的主频通常是地面地震的数倍甚至更高，可以达到几百赫兹。
The method which combines cross correlation detection with chaos theory to detect the weak signals relative to central frequency in overvoltage monitoring is proposed in the paper.
提出将互相关检测和混沌理论相结合应用于过电压监测中的频率跟踪，检测相对于中心频率极小的微弱信号。
Post stack cross equalization generally consists of time shift calibration, amplitude calibration, phase calibration, frequency calibration and waveform calibration.
叠后互均化处理通常包括时移校正、振幅校正、频带校正、相位校正和波形校正。
By means of frequency selective surface (FSS) instead of metallic surface, a stealthy reflector antenna with small radar cross section (RCS) is constructed.
利用频率选择表面（FSS）代替普通金属面构成选频反射面隐身天线。
Using the wavenumber frequency transfer function to describe the whole system consisting of the plate and the liquid loading, a general expression of the cross spectrum was derived.
用波数-频率谱传递函数表征包括弹性板和流体负荷在内的整个系统的特性，导出了噪声场互谱函数的一般表示式。
In addition, line mode and zero-mode voltage wave cross each other at the point of fault which causes the natural frequency "aliasing".
此外，故障电压行波于非对称短路点发生线模与零模行波相互交叉透射，致使故障电压自然频率“混叠”。
Unlike the traditional kernel function methods to suppress cross terms, our method not only reduces the interfering cross-terms but also preserves the superb time-frequency concentration of the WVD.
不同于传统的抑制交叉项的核函数方法，该方法抑制交叉项的同时，保持WVD了高时频聚集性。
Time-frequency distribution(TFD) of multi-component signal can produce cross-components, TFD with fixed kernels perform well only for limited signals.
多分量信号的时频分布会产生交叉项，采用固定核函数的时频分布，其适用的信号形式有很大的局限性。
By using multiple overlapped SPWVD Windows, the effect of cross-term interference in the time-frequency analysis was minimized.
通过将多个时频分析的窗口重叠来克服时频分析中交叉项的影响。
The paper studied the issue of low frequency in shallow parts of cross-hole seismic reflection sections using imaging principle and deduced frequency variation factor.
本文利用成像原理对井间地震反射剖面的浅部频率变低问题进行了研究，导出了频率变化因子。
Object's radial velocity effect on object's radar cross section (RCS) outdoor measurement with pulse to pulse frequency shifting radar was researched.
研究了在脉间变频格式目标雷达散射截面(RCS)测试中目标径向速度对测试结果的影响。
The results showed that the radial frequency was greatly affected by the height of the cross-section, but the tangential frequency wasn't.
结果表明：截面高度对径向振动频率有显著影响，但是对切向振动频率影响很小；
In addition, rotating machinery is composed of many rotating parts. Orders of different shafts cross each other in frequency.
另外，旋转机械由多个转动部件组成，不同转轴对应的阶比在频率上会有交叉。
Graphical Electromagnetic computing (GRECO) is one of the valuable method for computing the radar cross section (RCS) of complex radar target in high frequency region.
图形电磁计算(GRECO)方法是计算复杂目标高频区雷达散射截面(RCS)的有效方法之一。
Graphical Electromagnetic computing (GRECO) is one of the valuable methods for computing the radar cross section (RCS) of complex radar target in high frequency region.
图形电磁计算(GRECO)方法是计算复杂目标高频区雷达散射截面(RCS)的有效方法之一。
By changing the cross sectional radius decay coefficient of the exponential metal horns, the longitudinal and torsional vibrations in the transducer could resonate at the same resonance frequency.
通过改变换能器前后指数型盖板的半径减编系数，得出了换能器中纵向与扭转两种振动模式同频共振的条件。
In order to decrease the mirror frequency interference, cross interference and inter-modulation interference, double IF (Intermediate frequency) is adopted in the receiver.
为了降低镜频干扰、交调和互调干扰，接收机采用了双中频方案。
Leptospirosis sera and Borrelia burgdorferi could be cross-reacted occasionally, that was also confirmed by animal test, but the frequency and antibody dilution was low.
钩端螺旋体病患者与伯氏疏螺旋体偶尔可出现交叉反应，在动物试验亦得到证实，但出现频度和滴度均不高。
Based on the cross-power spectrum estimation, the algorithm has the advantages of lower complexity and better precision over wide frequency band.
该算法基于互功率谱估计，具有算法复杂度低、精确度高、适用频率范围广等优点。
Conductor cross section method of moment was applied in extracting the resistance and inductance frequency dependent distribution parameter of multiple conductor transmission lines of IC.
用导体截面矩量法提取多导体芯片传输线电阻和电感频变分布参数时，为了使矩量法程序化，提出了几种不同的网络划分方法。
Conductor cross-section method of moment is applied in extracting resistance and inductance frequency-dependent distributed parameter of IC interconnects.
本文使用导体截面矩量法提取芯片内互连线电阻和电感频变分布参数。
There are many long and elastic round cross-section rod structures in quayside container crane, whose frequency are so low that it is easy to arouse crosswind resonance.
岸边起重机结构中有许多长的弹性圆截面杆件，自振频率比较低，很容易发生横风共振。
The general expression for the lateral vibration frequency equations of compressed straight bars with constant cross section on elastic foundations is deduced in this paper.
推导出弹性地基上的等截面受压直杆横向振动频率方程的一般表达式。
The process of dual frequency electromagnetic forming with small cross section rod feeding is studied.
研究了金属熔体的小截面送料双频电磁成形过程。
The influence of the axial force and the inertial effect of the cross section on the natural frequency of flexural vibration is considered.
考虑轴向力和截面转动惯性效应的影响，导出弯曲振动的固有频率。
The radar cross section (RCS) of a target is dependent on frequency as well as observation angle.
目标的雷达散射截面（RCS）与照射频率和照射角有关。
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