如何定量地估算地震记录的信噪比，至今尚未见到一种行之有效的方法。
An effective method has not been developed yet of quantitatively estimate signal-to-noise ratio of seismic record.
研究表明，立方法可以有效地抑制信号中的随机噪声成分，从而提高信号的信噪比。
Results of the study show that the method can effectively weaken the noise which infiltrated in the signals, and therefore improve the signal to noise ratio.
理论分析和仿真实验证明，在负信噪比条件下该方法可有效提高对DS-SS信号载波的检测能力。
Then we detect and estimate the carrier frequency of negative SNR DS-SS Signal have done. Theoretic analysis and simulation prove the validity of the arithmetic.
对典型复杂背景下10幅1000帧图像的仿真结果表明，当信噪比大于或等于1.5时，可以有效检测出运动点目标。
Finally, some simulation results with 1000 frames from 10 typical images in complex background show that moving point targets with SNR not lower than 1.5 can be detected effectively.
实验结果表明，该算法简洁有效，嵌入水印所引起的信噪比的损失很小。
Experimental results show that the proposed algorithm is considerable simple and efficient, and PSNRs of watermarked frames are reduced rather slightly.
仿真实验表明，该检测方法能在低信噪比环境中，以低虚警率对低速目标进行有效检测。
The simulation results show that the proposed method succeeds in detecting low speed target with low false alarm probability in low signal to noise ratio environment.
实验表明用这种信噪比估计方法选择增益滤波器十分有效。
Experiments show that it is very effective using this method of evaluating gain filter performance.
计算机仿真结果表明在不降低译码性能和不增加系统复杂度的情况下，使用该方法可以有效地减小平均迭代次数和译码延时，尤其是在大信噪比时，效果更好。
The simulation result shows the proposed scheme can reduce decoding delay and average number of iterations with negligible decoding complexity and performance degradation, especially in large SNR.
结果表明：叠前时间偏移技术能够有效地提高构造复杂地区煤层的成像效果，提高煤田地震资料的信噪比和分辨率。
The results demonstrated that this technology can improve imaging of coal seams in structure complicated areas and coalfield seismic data signal-to-noise performance and resolution effectively.
该智能天线在每个阵元输出带有时域均衡器，可以在多径环境下有效消除多径干扰和多用户干扰，提高信噪比。
Tore duce effective the multipath disturbance and multi-user interference and improve the SNR, time-domain equalizer is employed at the output of each array element of smart antenna.
理论上，二元统计编码图象识别技术，对处理实际获得的低信噪比相干和非相干图象也是很有效的。
In theory, the binary image recognition technique of the binary statistic coding is very effective for processing of the practically obtained low SNR coherent and incoherent images.
实验结果表明，该方法能有效检测和分割出低信噪比复杂自然背景红外图像中的目标。
The experimental results show that the method can effectively detect and segment the target in a low SNR infrared image with the complicated nature background.
红外图像中的弱小目标因为信噪比和对比度较低，用单帧图像检测很难得到满意的效果，利用多帧图像信息进行检测是有效的手段之一。
In terms of the low SNR and contrast, the small and dim targets can not be easily detected in a single IR image, so utilizing a sequence of images is an effective method.
利用允许失真值与信噪比，达到根据图像内容自适应嵌入水印的目的，从而有效的提高水印的平均嵌入强度。
Taking use of allowable distortion, we can embed watermark adaptively according contents of image to improve average embedding intensity effectively.
该方法为分析信号，特别是信噪比较低的信号的导数计算提供了一种有效工具。
The proposed CWT method is an efficient tool for the derivative calculation of analytical signals, especially for signals whose SNR is relatively small.
试验结果表明，算法可以有效地抑制噪声，提高信噪比，减少失真。
Experiment results show that the algorithm can effectively suppress noise, improve SNR and reduce distortion.
浅层地震探测中，通过高分辨率数据处理，能有效地提高资料的信噪比和分辨率。
The SNR and resolution of seismic data can be effectively improved through high resolution processing of seismic data in shallow seismic prospecting.
此法大大地提高了有效的信噪比(SNR)和自相关矩阵的估计精度。
The effective signal-to-noise ratio (SNR) and the accuracy of autocorrelation estimation are significantly improved through use of this method.
经试验证明，这是一种有效的编码方法，在相同压缩比率下提高了重建图像的峰值信噪比PSNR。
Experimental results show that the improved hybrid image coding can improve the PSNR of the rebuilded image at the same compression ratio.
提出了基于高阶谱的减噪方法，能有效提高回波信号的信噪比，减弱检测噪声对于缺陷散射特征的影响，从而突出缺陷特征信息。
A method for reducing noise based on high-order spectra was presented by which the signal-to-noise ratio (SNR) could be improved significantly and the flaw characteristic information could stand out.
主要研究了动基线时差测量系统采用多脉冲相参积累算法对低信噪比条件下运动目标的有效检测问题。
How to detect moving target in low SNR condition for moving-baselines time difference measuring system is studied, using multi-pulses coherent integration algorithm.
仿真结果表明，周期斜率方差检测器是一种恒虚警概率检测器，在较低信噪比下可有效检测双曲调频信号，并对多普勒失配有很好的适配性。
The simulation result shows that VPSD is a kind of constant false alarm rate detector, which can detect HFM signal effectively in low SNR, and can adapt to the Doppler mismatch very well.
仿真信号和冬虫夏草的毛细管电泳信号滤噪结果表明，该法在保持峰位与峰高不变的情况下可显著提高信噪比，有效滤除噪声峰。
It was indicated that this method could significantly improve the signal-to-noise ratio (SNR) and efficiently filter the noise peaks, while the peak position and height remained unchanged.
通过实验表明，该方法较其它方法简单有效，即使在较低信噪比的情况下，也能对极点作出较好的估计。
The experimental results demonstrate that the method can give a better estimation of poles of damped exponential signals even in a lower signal-to-noise ratio (SNR) situation.
该方法可有效地降低检测电路的噪声干扰，提高输出信号的信噪比。
The method can effectively reduce noise interference of the detecting circuit and increase signal noise ratio of the output signal.
x射线编码三维成像系统中，减少观察层上的重叠噪声是提高图像信噪比的有效方法。
In a three dimensional X ray coded imaging system, it is effective method to reduce the reduplicate noise of a certain layer image for enhancing the signal noise rate.
为了对低信噪比的超声图像进行有效分割，提出一种谱聚类集成的超声图像分割算法。
A novel ultrasound image segmentation algorithm, which is based on the spectral cluster ensemble, is proposed to segment ultrasound images with low SNR.
实验结果表明，该系统能有效消除背景噪声，抑制“音乐噪声”，在较低信噪比下也能获得很好的增强效果，同时该系统能够实现实时语音增强。
The results of experiments show that this system can suppress the noisy speech effectively on time with a low level of musical noise even at a low SNR.
实验结果表明，该系统能有效消除背景噪声，抑制“音乐噪声”，在较低信噪比下也能获得很好的增强效果，同时该系统能够实现实时语音增强。
The results of experiments show that this system can suppress the noisy speech effectively on time with a low level of musical noise even at a low SNR.
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