Surface condition is very complex in western area, data quality is bad, most western data is low signal to noise ratio seismic data.
西部地区地表情况复杂多样，资料品质较差，多属低信噪比资料。
Objective The directly sampled pulse wave signals have always a low signal to noise ratio, which leads to difficulties in the following research.
目的采样得到的脉搏波信号信噪比较低，这给后续研究带来了困难，因此消除噪声的干扰是准确进行相关医学测量的关键前提。
Be noted that, as the seismic data on hand has a relatively low signal to noise ratio, there is a gap between the processing results and the expected results.
需要指出的是，由于实际井间地震资料的信噪比较低，因而处理结果与预想结果之间存在一定的差距。
To identify the echoes of low signal to noise ratio, we can apply the algorithm by using scale coefficients of wavelet transformation in place of the basic signal.
对于低信噪比的回波可以采用其小波变换后的尺度系数代替原信号使用本算法来识别。
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.
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。
Reconstructing MR images from under-sampled measurement data using traditional reconstruction methods usually results in image artifacts and low signal to noise ratio.
用传统MR图像重建方法对降采样数据进行重建往往会产生严重的伪影或导致重建图像的信噪比下降。
This paper discusses the despread of low signal to noise ratio of the direct sequence (DS) spread spectrum signals using intermediate-frequency recirculation summation loop (IFRSL).
本文讨论了用中频积累法实现低信噪比直接序列扩频信号的解扩。
In this paper, a blind despreading algorithm is proposed for the synchronous multi-user long-code Direct Sequence spread Spectrum (DS-SS) signals in low signal to Noise Ratio (SNR) scenarios.
针对同步多用户长码直扩信号，该文提出了一种低信噪比条件下的盲解扩算法。
CLIA using acridinium ester derivatives as chemiluminescent label has advantages of low background and high signal-to-noise ratio.
以吖啶酯衍生物为发光标记物的CLIA的特点是：自然本底低和信噪比高。
You're in conversation with one person but the signal to noise ratio is low, meaning his voice, the signal, is quiet relative to the ambient conversational noise.
你正在和一个人谈话，但是信号和噪音的比率低，也就是说，对方的声音(信号)，相对于周围的谈话声(噪音)是安静的。
The endpoint detection based on short-time average magnitude of speech signals relative autocorrelation sequences can be detected in high accuracy under the low signal-to noise ratio.
在较低信噪比情况下，基于语音信号的短时相对自相关序列的短时平均幅度的端点检测能够获得较高的检测精度。
Traditional short-term autocorrelation-based adaptive line spectrum enhancer (SABALSE) becomes low in suppressing Gaussian noise when input signal-to-noise ratio becomes low.
通常的基于短时自相关的自适应线谱增强器（SABALSE）主要缺点是：输入信噪比低时，抑制高斯噪声性能差。
A new digital modulation recognition method based on instantaneous information is proposed for the application under the low signal-to-noise ratio (SNR).
针对数字调制识别在低信噪比下的应用，提出一种新的基于瞬时信息的调制识别算法。
In deep space communications, one of the problems is how to transmit message credibly in low signal-to-noise ratio (SNR) channel environment.
深空通信中面临的问题之一就是如何在低信噪比信道环境下可靠地传递信息。
Because of complex fracture system, faulted structures, and rich igneous rocks, SXF area is a representative low signal-to-noise ratio seismic data region in Subei basin.
苏北盆地的SXF地区是典型的低信噪比地震资料地区，断裂系统复杂，构造破碎，圈闭面积小，火成岩发育。
Results When the DNA concentration was low, the nucleotide curve showed low ratio of signal to noise, even there were no fluorescent signals.
结果测序模板浓度过低，则核苷酸曲线的信∶噪比小，甚至不出现荧光信号。
To improve beamforming under low signal-to-noise ratio, a method based on stochastic resonance(SR)in a bistable model is investigated by using a frequency scale transformation method.
为了改善低信噪比下波束形成的性能，从双稳态随机共振模型出发，提出了利用频率尺度变换，将随机共振和波束形成结合起来的算法。
FATAFE realizes unbiased estimation and its estimated variance approaches to theoretical lower bound if only signal-to-noise ratio is not very low.
只要信噪比不甚低，频点自跟踪频率估计是无偏的且估计方差接近理论下限。
The signal to noise ratio in the deep space communication channel is so low that high quality channel coding scheme is essential for deep space comnunication systems.
由于深空信道的极低的信噪比，具有高增益的信道编码技术是深空遥测系统必不可少的环节。
A method to classify neural spikes under low signal-to-noise ratio was investigated by using artificial neural networks and template-matching.
基于人工神经网络和模板匹配，提出了对低信噪比神经元信号分类的方法。
CLIA using acridinium ester derivatives as chemiluminescent label has advantages of low background, high signal-to-noise ratio, no need of catalyst and simple luminescence system.
以吖啶酯衍生物为发光标记物的CLIA的特点是：标记简单、标记物稳定、不需要催化剂、自然本底低、受外界干扰因素少、信噪比高、发光体系简单等。
When seismic data signal to noise ratio is low and conventional processing effect is not good, scaling down processing may be introduced in data processing.
在地震资料信噪比较低，常规处理效果不理想的情况下可考虑采用分频处理。
In the case that the signal-to-noise ratio and the number of times of superimposition are both rather low, the routine processing is not effective, and frequency division processing may be used.
在地震资料信噪比比较低，叠加次数比较低的情况下，常规处理效果不好，可以采用分频处理。
Computer simulations show that, even under low input signal-to-noise-ratio, the accurate estimation of DOA could be given when the virtual array method is applied to the planar array.
仿真结果显示：虚拟阵元法应用于面阵，在输入信噪比较低的情况下仍可以准确判断来波方向。
Seismic data acquired in complex mountains in Yiyang area are characterized by low signal-to-noise ratio and large statics.
宜阳复杂山地地震资料的特点是静校正量大，信噪比低。
Through simulation experiments, it is shown that it behaves more robustly and can detect pitch more accurately at low signal-to-noise ratio.
实验表明，在信噪比较低的情况下，该法也能较精确的检测基音周期。
However, the inherent characteristics of infrared images, such as low signal-to-noise ratio and unitary information, have made it a complex challenge for human detection and tracking.
但是，红外图像信噪比低、信息单一等因素的制约，使红外图像中的人体检测跟踪成为了一个极具挑战性的课题。
However, now this acoustooptical tomography has great distance from the clinical application due to both low signal-to-noise ratio (SNR) and impossibility to examine the patient in vivo.
目前的声光层析方案距离临床应用还差很远，主要是信噪比差，且无法实行活体检测。
The performance of non-regenerative relaying is superior to that of regenerative relaying at low average signal noise ratio (SNR), but the performance of the both is similar at high average SNR.
比较了非再生中继性能在低信噪比时优于再生中继，在高信噪比时两者性能相似。
The performance of non-regenerative relaying is superior to that of regenerative relaying at low average signal noise ratio (SNR), but the performance of the both is similar at high average SNR.
比较了非再生中继性能在低信噪比时优于再生中继，在高信噪比时两者性能相似。
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