The spectrum analysis of Frequency-wavenumber(F-K)is one of the traditional methods of data processing for seismic array.
频率-波数（F- K）谱分析是地震台阵数据处理基本方法之一。
The project also included an update of the interface units for the F-35 radio frequency test system.The test system reflects how the system would operate under real-world conditions.
项目还将升级F - 35无限频率测试系统的接口单元，该测试系统主要反映系统如何在真实环境下作战。
The project also included an update of the interface units for the F-35 radio frequency test system. The test system reflects how the system would operate under real-world conditions.
项目还将升级F-35无限频率测试系统的接口单元，该测试系统主要反映系统如何在真实环境下作战。
So if now I hang on it a mass of one kilogram, I can calculate the period of one oscillation, and one over the period F is the frequency F, and I believe that is something like 38 hertz.
如果在上面,悬挂1公斤物质，我能够计算出,振荡的周期，1除以周期,等于频率，我相信,等于大概38赫兹。
So you can see now if the object comes to you, in other words, f if f prime is larger than f, if the frequency is higher, then the wavelength will be smaller.
所以你可以看到,如果物体靠近你，换句话说，如果f撇大于，如果频率变高，波长就会变短。
Let this be the transmitter f which produces frequency f, and here is the receiver which receives the frequency f prime.
这个是发射机,发射频率是，这是接收机,接收频率f撇。
The L F signals are transformed by entropy based on wavelet packet algorithms for best basis selection, and the results are displayed in time- frequency space namely phase plane.
该方法采用基于熵的小波包最佳基选取准则，对局部损伤信号进行自适应小波包分解，将分解结果显示于时—频空间即相平面上。
The spectrum of amplitude modulated signal are two half magnitude spectrums of base band signal positive and negative shifted by a carrier or R. F. frequency.
调幅讯号之频谱为一半强度基频讯号之频谱分别正负位移一射频或载波之频率。
The frequency domain and space domain anti-stealth techniques of radars are summarized, and Fight F-117A is taken as a typical example in order to discuss the radar detectability of stealth vehicles.
本文综合论述雷达的频域反隐身与空域反隐身技术并以F- 117a飞机为例探讨了隐身飞行器的雷达可探测性。
After frequency selecting when white light walks through the F-P sensor which cavity modulated by temperature, wavelength demodulating is realized with a plane grating and CCD.
采用铜管和端面镀膜的光纤制作f - P传感器，白光光源经过腔长受温度调制的F - P传感器选频后，用平面光栅和线阵CCD实现光波波长的解调。
Frequency Selective Filter (FS f) is utilized to design feedback controller in frequency do-main. For each disturbance frequency, there are only two real coefficients to be tuned.
使用频率选择滤波方法在频域设计反馈控制器，对每个干扰频率，仅需调节两个实系数。
L. f. noise can be better attenuated so as to obtain good attenuation characteristics over the entire audible frequency range by using active noise reduction technique in the closed-air type earmuff.
在密闭型耳罩中，利用有源降噪技术可以较好地衰减低频噪声以使整个可听声频率范围内获得良好的衰减特性。
The circular region F-norms in low frequency band of wavelet transform is used as color feature of the image and the energy ratio of high frequency band is used to form texture descriptor.
颜色特征采用整数小波低频系数矩阵中环形区域的F -范数，纹理特征则采用高频部分的能量比值。
The results indicated that ADG, ADFI and F/G had no significant difference among 3 groups (P>0.05), there was a tendency for reduced diarrhea frequency in the piglets in MF group and HF group.
结果显示，3个粗纤维水平对仔猪的平均日增重、平均日采食量和料重比均无显著影响（P>0.05），中、高粗纤维水平有降低仔猪腹泻频率的趋势（P>0.05）；
The insulation class F or class H . The insulation of open-loop U/f condition of . structure has the adaptability to high carrie frequency voltage supplied by frequency converter .
电动机的绝缘等级为F级或H级，绝缘结构具有对变频器输出高载波频率电压的适应能力。
By using these equations, the frequency-tuning characteristics of te (a) CO2 lasers, using such techniques as grating, F-P modulator, or injection locking, can be investigated theoretically.
利用这个方程组，可以从理论上研究采用各种可调谐技术(如光栅调谐、F - P调制器调谐、注入锁模等)的TE (A) CO_2激光器的调谐特性。
The paper adopts the mechanism of event-driving multi-procedure to realize voice-frequency processing and multichannel mixing. It also achieves f…
采用了事件驱动的多线程机制实现音频处理和多路混音，并在压缩域实现四画面和成。
Because the Local wave T-F spectrum can be showed in the gray image, so we use the moment invariants of time-frequency image as the fault features.
由于局域波时频谱可以表示为灰度图像。因此，利用图像信息的不变矩进行故障特征提取。
Height events have the necessity to reduce the trial jump frequency. This article puts forward special methods about reducing trial jumping f...
高度项目比赛有必要减少试跳次数，提出了减少试跳次数的具体办法。
Height events have the necessity to reduce the trial jump frequency. This article puts forward special methods about reducing trial jumping f...
高度项目比赛有必要减少试跳次数，提出了减少试跳次数的具体办法。
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