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原始频率
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  “原始频率”译为未确定词的双语例句
     First,the raw interferogram is transformed to ZIF one and then decomposed to two cross signals in vector,which include the sine signal and the cosine one. Secondly,the sine signal and the cosine one are filtered by Low-Pass(LP) filter respectively. The LP filter can be mean filter or median filter.
     该方法引入无线电技术中的零中频技术,将干涉图由高的中心频率变为零中频信号,再将信号分解至矢量空间中的两路正交信号,得到正弦支路信号和余弦支路信号,并分别进行低通滤波处理,最后根据滤波后的两路正交信号计算出滤波后的零中频干涉图,并恢复干涉图的原始频率,得到原始干涉图的滤波结果。
短句来源
     Taking the traceable source link system of the time-frequency as the typical one from the National Intelligence Standard Research Institute(NIST) of the United States,the article provides its block-diagram and technical indicators,reviews its aim and its task.
     主要以美国国家技术标准研究院(NIST)的时间频率溯源链系统为典型,给出其方框图和技术指标,并述评了NIST的宗旨、任务,及时间频率溯源链的重要特征是:拥有高精度的铯喷泉原始频率基准(准确度、稳定度均~1.10-15);
短句来源
  相似匹配句对
     ON FREQUENCIES
     频率
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     FREQUENCY
     生死频率
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     The frequency of initial (s) origination was 27%.
     珠心胚原始细胞发生频率为 2 7%。
短句来源
     A method of frequency measurement based on cross algorithm
     一种基于CROSS原始算法的频率测量法
短句来源
     f mutated by nitrous acid, the bio-activity of the bacterium T.
     f菌和原始T .
短句来源
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  initial frequency
It is shown that the self-phase modulation caused by a cubic nonlinearity of the Kerr type can "accelerate" optical pulses of a Gaussian shape up to superluminal velocities even in the case where an initial frequency modulation (chirp) is absent.
      
We have experimentally studied surface magnetoelastic waves in yttrium orthoferrite plates and discovered the phenomenon of energy pumping from the initial frequency (~1 kHz) to higher harmonics (~12.5 kHz).
      
It is shown that Gaussian pulses can be accelerated to supraluminal velocities in the presence or absence of initial frequency modulation.
      
One receptor cell showed a concentration-dependent response to sucrose and honey solutions with an immediate rise of the spike activity which adapted within one second to half the initial frequency.
      
In case of the heterozygotes having the lowest selling rate, only trivial stationary states are possible, and are depending on the initial frequency.4.Selection in favour of a genotype intensifies the effect of selling this genotype.
      
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Fast recovery and frequency-shifting of real bandpass signal based on second-order sampling is discussed. Using FFT and complex filtering, real bandpass signal can be recovered as a analytic signal whose central frequency is within two times of its bandwidth, and phase property is not changed. Finally, using simple computation, original frequency can be acquired. Computer simulation shows the correction of the method.

本文讨论了实带通信号在二阶非均匀采样下的快速频域搬移、恢复,即用FFT方法将实带通信号恢复到两倍带宽(2B)内的复解析信号,而幅度和相位保持不变,最后经过简单的运算,得到原始频率。计算机模拟证实了上述方法。

A new filtering algorithm for interferogram wan presented.It assimilates the idea of zero intermediate frequency(ZIF)in radio technique.First,the raw interferogram is transformed to ZIF one and then decomposed to two cross signals in vector,which include the sine signal and the cosine one.Secondly,the sine signal and the cosine one are filtered by Low-Pass(LP) filter respectively.The LP filter can be mean filter or median filter.This paper adopts mean filter.Then,the filtered ZIF interferogram is calculated...

A new filtering algorithm for interferogram wan presented.It assimilates the idea of zero intermediate frequency(ZIF)in radio technique.First,the raw interferogram is transformed to ZIF one and then decomposed to two cross signals in vector,which include the sine signal and the cosine one.Secondly,the sine signal and the cosine one are filtered by Low-Pass(LP) filter respectively.The LP filter can be mean filter or median filter.This paper adopts mean filter.Then,the filtered ZIF interferogram is calculated from the filtered sine and cosine signals.Finally,it is transformed to original frequency to get the filtered result of the raw interferogram.Experiments show that the new interferogram filtering algorithm can resolve the difficulty in dealing with dense fringe.The effect of this method is excellent.

提出一合成孔径雷达干涉测量干涉图的滤波方法。该方法引入无线电技术中的零中频技术,将干涉图由高的中心频率变为零中频信号,再将信号分解至矢量空间中的两路正交信号,得到正弦支路信号和余弦支路信号,并分别进行低通滤波处理,最后根据滤波后的两路正交信号计算出滤波后的零中频干涉图,并恢复干涉图的原始频率,得到原始干涉图的滤波结果。实验结果表明:该方法滤波效果较好,能够解决干涉图条纹密集时滤波处理困难、效果较差的问题。

Taking the traceable source link system of the time-frequency as the typical one from the National Intelligence Standard Research Institute(NIST) of the United States,the article provides its block-diagram and technical indicators,reviews its aim and its task.The article also gives the important characters of the traceable source link of the time-frequency,which includes:having the high-accuracy cesium fountain primitive frequency benchmark(accuracy and steady degrees all reach to 1·E~(-15)),keeping ahead in...

Taking the traceable source link system of the time-frequency as the typical one from the National Intelligence Standard Research Institute(NIST) of the United States,the article provides its block-diagram and technical indicators,reviews its aim and its task.The article also gives the important characters of the traceable source link of the time-frequency,which includes:having the high-accuracy cesium fountain primitive frequency benchmark(accuracy and steady degrees all reach to 1·E~(-15)),keeping ahead in the aspect of time-frequency transform method technology research and development,then reaching the advanced level in the frequency measurement and the analytical system of long-range calibration(FMAS),so as in the quality of the high integration, automatization,intelligent,lightweight of top-level equipment in the traceable source link system.At last,the article describes the importance and the key technical indicator achieved at present to the high-accuracy synchronous time-frequency system in the field of the astronomy measurement,the guided missile launch,navigation and orientation,etc.

主要以美国国家技术标准研究院(NIST)的时间频率溯源链系统为典型,给出其方框图和技术指标,并述评了NIST的宗旨、任务,及时间频率溯源链的重要特征是:拥有高精度的铯喷泉原始频率基准(准确度、稳定度均~1.10-15);在时间频率传递方法和技术研究开发方面处于领先地位;在远程校准的频率测量和分析系统(FMAS),及溯源链系统的尖端装备的高集成化、自动化、智能化、轻量化品质方面均达到先进水平。并综述了高精度的时间频率同步系统在天文学测量、导弹发射、导航、定位等科学实验研究领域中的重要作用和目前达到的关键技术指标。

 
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