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有效地提高信噪比
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  effectively improving snr approximately
     Such a new method has proved to be capable of effectively improving SNR approximately by 15dB.
     实验证明这种新方法能够有效地提高信噪比15dB。
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  “有效地提高信噪比”译为未确定词的双语例句
     The results show that the method can constrain the noise in the high frequencies effectively and the restored images can reach the resolution of diffraction limit.
     实验结果表明:该规整化方法可以有效地抑制解卷积过程中高频噪声的影响,恢复出达到理论衍射极限分辨率的图像。 对于噪声水平较高的降质图像,通过这种解卷积方法可以有效地提高信噪比
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     1. Studies on de-envelope using complex analytical Wavelet transform, and harmonic components extraction of envelope through 11/2 dimensional Spectrum.
     1.研究了舰船辐射噪声复解析子波变换解包络的方法,并利用1 1/2维谱提取包络的二次耦合频率的谐波成份。 利用该方法能同时实现滤波和解包络,有效地提高信噪比,突出包络中的周期成份。
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     Ultrasonic A scan signals interrogating artificial defects in noisy material of coarse grain austenite stainless steel are analyzed by use of wavelet transform. The presented results show that wavelet transform affords an substantial technique to enhance signal to noise ratio of signals with serious noisy background, provided that appropriate insight into the wavelet coefficients.
     用小波变换对噪声材料粗晶奥氏体不锈钢中人工缺陷的超声A型信号处理的结果表明,在对小波系数合理解释的情况下,小波变换能有效地提高信噪比
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     Having changed a two-variate seismic signal into a four-variate function relat-ing to time, frequency, space and wavenumber with the use of continuous 2D wavelet transform, we can suppress many noises (such as surface waves and regular noises) to enhance the signal/noise ratio of selsmlc data by making full use of the differences between signal and noise in four aspects: time, frequency, space and wavenurnber.
     应用二维连续小波变换把一个二元的地震信号变换为有关时间、频率、空间和波数的四元函数,可以充分地利用信号与噪声在时间、频率、空间和波数方面的差异来压制诸如面波、规则噪声等各种干扰,能有效地提高信噪比
短句来源
     The experimental result proves that the application of the random noise attenuation technique to VSP data processing obviously improves signal-noise ratio and first break pickup.
     试验结果证实,将随机噪声衰减技术用于VSP资料处理,可以有效地提高信噪比,改善初至拾取的精度。
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     The utmost high value of signal noise ratio can significantly improve the image quality.
     最大限度地提高有效地改善图像质量。
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     Improvement of S/N ratio of computer-generated filters
     提高计算全息滤波器的
短句来源
     IMPROVING THE SIGNAL-NOISE RATE OF SEISMIC RECORD WITH K-L TRANSFORM
     利用K—L变换提高地震记录的
短句来源
     Such a new method has proved to be capable of effectively improving SNR approximately by 15dB.
     实验证明这种新方法能够有效地提高15dB。
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     To Improving the Signal-to-Noise Ratio ofDigital Audio Signal
     数字音频提高
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A application of the analytical method of double working electrodes thin-layer electrolyticcell in series has been re ported in this paper.The first electrode in flow path is used for anodicstripping and riching,and the second electrode for collecting,and the reduction current of thesecond electrode is recorded, This method has the advantages of anodic stripping and poten-tiostat voltametry of thin-layer cell.

本文介绍用双工作电极串联式的薄层电池,结合阳极溶出伏安法,用上游工作电极作富集-溶出电极;下游工作电极作收集电极,记录下游工作电极的收集电流。本法具有溶出法和薄层伏安法的优点,可消除电位扫描引入的电容电流,以及吸附电流、杂质电流的干扰,有效地提高了信噪比,提高了测定的灵敏度和分辨率。

Random noise attenuation technique developed in recent years is obviously effective on improving the signal-noise ratio of surface seismic stack section(or stack migration section). This technique is used on the premise that at each frequency, the signals which have been converted from time-space domain into frequency-space domain can be expressed as the sum of complex exponential functions which are independent of wavelet waveform.In other words, such signals at each frequency may be considered as a linear...

Random noise attenuation technique developed in recent years is obviously effective on improving the signal-noise ratio of surface seismic stack section(or stack migration section). This technique is used on the premise that at each frequency, the signals which have been converted from time-space domain into frequency-space domain can be expressed as the sum of complex exponential functions which are independent of wavelet waveform.In other words, such signals at each frequency may be considered as a linear event.This property can be used to separate signal from noise.All the upgoing,down- going and converted shear wave events in VSP data show such a linear property,which,therefore, offers a prerequisite for us to use the technique.The experimental result proves that the application of the random noise attenuation technique to VSP data processing obviously improves signal-noise ratio and first break pickup.

近几年发展起来的随机噪声衰减技术,对提高地面地震叠加剖面(或叠偏剖面)的信噪比有明显的效果。这项技术的应用前提在于时间—空间域的信号变换到频率—空间域后,在每个频率上可以表示为与子波形状无关的一系列复指数函数之和,也就是说,频率—空间域中的信号在每个频率上都可看作是一个线性同相轴。利用这个特性,就可以把信号和噪音分离开来。VSP资料中的上行波、下行波和转换横波都具有线性特征,因而它具备应用此项技术的前提条件。试验结果证实,将随机噪声衰减技术用于VSP资料处理,可以有效地提高信噪比,改善初至拾取的精度。

This paper introduces an algorithm of adaptive Kalman filter and its microcomputer software for extracting EEG signal. In practical applicatiom, thisfiltering method can get the optimal estimation of EEG signal disturbed by noises or irrelevant signals completely through analysis in time domain with the least transcendental knowledge of parameters of signal and noise model. Such a new method has proved to be capable of effectively improving SNR approximately by 15dB.

本文介绍了一种提取脑电信号的自适应卡尔曼滤波算法及其微机处理软件。在实际应用中,此滤波算法实现了在最小信号和噪声模型参数的先验知识下,完全采用时域分析法,对混在噪声或无关信号中的脑电信号进行最优估值。实验证明这种新方法能够有效地提高信噪比15dB。

 
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