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flat noise
相关语句
  白噪声
     (3)in output circuit of the detector,filtering flat noise and efficiently extracting and amplifying weak target signals buried in the strong noise. Consequently,the operating performence of the infrared fathometer is maximized and the experimental result agrees with the theory,thus the designing requirements have been achieved.
     ③在探测器输出信号处理电路中滤除广白噪声、有效提取并放大深埋在强噪声中微弱目标信号的方法和途径.从而使该红外测温仪性能得到了最大限度地提高,实验结果和理论分析值相符,达到了设计要求
短句来源
  相似匹配句对
     NOISE
     噪音
短句来源
     Noise
     噪声的危害与控制
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     Birefraction of W Flat
     W片的双折射
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     The World is Flat
     世界是平的
短句来源
     The noise and topography formed by using different flat specimen materials are alsoinvestigated.
     分析了使用不同闸瓦材料时的摩擦噪声现象和磨痕形貌。
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  flat noise
The usual PDP processing comprises cutting off all the data below a previously determined flat noise threshold.
      
The flat noise of the voltage amplifier is 0.9 nV/Hz1/2, with the 1/f knee below 100 Hz.
      
The flat noise spectrum we sometimes do see in practical oscillators must have come from buffers rather than the LC oscillator proper.
      
Note that the analysis above is valid for frequencies greater than 100 Hz and assumes relatively flat noise, above 10 kHz.
      
In order to restore a flat noise spectrum, the filtered period spectrum is reshaped by the inverse transfer function of LPF.
      
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A new method——Self-Excitation Threshold Autoregressive model (SETAR) isused to verify predictions of the annual average value of the sunspot number for 1956-1985 and to forecast for 1986-1997.This model as follows:here, p1,p2 are the steps of the model; are the coefficients; j( = 1,2) is the constant; { } is the flat noise series of the zero average, ita variance and are independent from each other; ris the value of the threshold; d is a delay parameter.The coefficients are estimated by the least squares...

A new method——Self-Excitation Threshold Autoregressive model (SETAR) isused to verify predictions of the annual average value of the sunspot number for 1956-1985 and to forecast for 1986-1997.This model as follows:here, p1,p2 are the steps of the model; are the coefficients; j( = 1,2) is the constant; { } is the flat noise series of the zero average, ita variance and are independent from each other; ris the value of the threshold; d is a delay parameter.The coefficients are estimated by the least squares estimation method. p, r, d are determined by AIC principle.here, Nj is the sample length about the branch model; L is permited the maximum of pj, it is artificially given; TO is permited maximum in choosing r ', D is permited rnaximun in choosing d.The forecasting verification about the annual average values of sunspot number for 1956 - 1985 is made by the above method. The results are given in table 2. The maximum of the analogous erroris 40.6. The minimum of the analogous erroris 0.3. The average of the analogous is ±12.5The predictions about the annual average value of the sunspot number for 1986 -1997 are given in table 4. It is determined by table 4 that the minimum of the current cycle is in 1986 --1987 and maximum of the coming cycle is in 1990 - -1991, RM = 81.2±16.2.

本文用一种新方法——自激励门限自回归分析方法对太阳黑子相对数年平均值进行拟合和预报检验,并对未来第22周逐年年均值作出预报。 目激励门限自回归分析模型的形式如下: 在对1956至1985年逐年太阳黑子相对数年均值的预报检验中,最大拟会误差为40.6,最小拟合误差为0.3,平均拟合误差为±12.5。 对1986至1997年逐年太阳黑子相对数年均值的预报见表(4)。定出第21周极小在1986年或1987年,极大在1990或1991年,极大值R_M=81.2±16.2。

We present the introduction of the development of model BHJ\|400 portable infrared fathometer.The following methods are introduced:(1) improving the signal noise ratio of the infrared optic syatem;(2)improving the output signal of the infrared detector;(3)in output circuit of the detector,filtering flat noise and efficiently extracting and amplifying weak target signals buried in the strong noise.Consequently,the operating performence of the infrared fathometer is maximized and the experimental result...

We present the introduction of the development of model BHJ\|400 portable infrared fathometer.The following methods are introduced:(1) improving the signal noise ratio of the infrared optic syatem;(2)improving the output signal of the infrared detector;(3)in output circuit of the detector,filtering flat noise and efficiently extracting and amplifying weak target signals buried in the strong noise.Consequently,the operating performence of the infrared fathometer is maximized and the experimental result agrees with the theory,thus the designing requirements have been achieved.

就“BHJ400”型便携式电脑红外测温仪的研制从理论和实践角度介绍了以下内容:①提高红外光学系统信噪比的方法和途径;②提高红外探测器输出信号的方法和途径;③在探测器输出信号处理电路中滤除广白噪声、有效提取并放大深埋在强噪声中微弱目标信号的方法和途径.从而使该红外测温仪性能得到了最大限度地提高,实验结果和理论分析值相符,达到了设计要求

Based on the experimental and theoretical investigations on the gain and noise characteristics, a broadband hybrid amplifier composed of distributed Raman amplifier and EDFA is realized. A method for optimal design of the hybrid amplifier is proposed. It is pointed especially that adjusting the gain specta of Raman amplifier and EDFA properly can realize flat noise figure spectrum.

基于对增益和噪声特性的分析,本文实现了长距离宽带传输系统中由分布拉曼放大器和掺铒光纤放大器中组成的宽带混合放大单元,井提出了混合放大器进行优化设计的方法,特别指出适当调整拉曼放大器和掺铒光纤放大器的增益谱可以实现噪声谱的平坦.

 
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