signal to noise ratio

To enhance the signal to noise ratio ( SNR) of fundamental ultrasonic echo signals for ultrasonic nondestructive testing ( UNDT) and ultrasonic nondestructive evaluation ( UNDE), an improved technique to suppress structural noises of ultrasonic signals was presented.

为了提高超声无损检测（UNDT）与无损评价（UNDE）基础数据的信噪比（SNR），提出了一种基于神经网络模式识别理论的小波域超声信号消噪技术。

In order to settle two problems of pseudo static correction value and invalid velocity analysis in conventional automatic static correction in processing the converted-wave data whose signal-noise ratio is low, we divide the processing sequence into two parts.

针对低信噪比转换波资料处理中常规自动静校正产生假静校正量和速度分析失效的两个难题，我们将处理流程分成两条数据流。

Study on Testing Video Signal to Noise Ratio of Television Tracking System

电视跟踪系统视频信噪比测试研究

The results showed that signal to noise ratio, detection limit and linear range were greatly improved.

用此方法对酚类进行定量分析,结果信噪比 、 检测限和线性范围均有较大改善.

The experimental results show that compared with the physical peak signal to noise ratio ( PSNR), correlation of the objective test parameter in this paper with the subjective evaluation the result is greatly improved.

实验表明，加权后的客观测试指标，较物理峰值信噪比（PSNR），与主观评价结果的相关性更高。

It performs better than widely used mean square error and peak signal to noise ratio.

该方法性能高于常用的均方误差和峰值信噪比图像质量评价方法,且简单有效.

Poor signal to noise ratio commonly resulted from real test shot gathers has influences on difference directly obtained shooting parameters variance;

3通常实际实验炮集数据内具有较低的信噪比，影响直接获得激发参数变化的差异；

This method can effectively improve signal to noise ratio and significantly shorten the measurement time without loss of resolution.

这种方法可以在不损失分辨率的前提下有效提高信噪比并显著缩短测量时间。

By using Quadrature combining technology in Open Mark 2000 MRI system of An Ke Inc., we developed Quadrature head coil which is better than normal solenoid coil by 20% in signal to noise ratio.

Open Mark2000磁共振成像系统中，采用正交合成技术，研制出的正交头线圈，较常规螺线管线圈的信噪比提高20%以上。

Completion of a given sequence to quantify and calculate the quantization error signal to noise ratio.

完成给定序列的量化,并计算量化误差的信噪比.

The bone marrow contrast ratio and signal to noise ratio of the diseased vertebrae on DWI were estimated.

测量病变椎体的信号强度比和信噪比。

As the pitch doubling and halving problems of NCCF algorithm often occurred with varied noises and Signal to Noise Ratio ( SNR), VAD algorithm is employed to separate speech and non-speech segments.

针对NCCF基音检测算法在不同噪声、信噪比下容易发生清浊误判的问题，本文在基音检测前端引入语音检测算法划分语音段与非语音段。

System test results show that the power consumption, stability, signal to noise ratio and versatility meet the system requirements.

系统测试结果表明，在功耗、稳定性、信噪比和通用性上都符合系统要求。

It is proved by the analysis of the simulated signals and different signal to noise ratio experimental data that this method can effectively determine the filter center frequency and bandwidth, thereby improving the signal to noise ratio and the diagnosis of bearing faults.

通过对仿真信号和不同信噪比实验数据的分析，证明此方法能够有效确定滤波中心频率和带宽，从而提高信号的信噪比，实现对轴承故障的诊断。

The noise voltage, the noise current and their output voltages at the terminal of amplifier are calculated, and the signal to noise ratio of the optic electric conversion circuit is estimated.

分析了频带与噪声电压的关系，计算了光电探测器的噪声电压和噪声电流以及它们在放大器输出端形成的噪声电压，并对光电转换的信噪比进行了计算。

Simulation results show that the both conventional decoders exhibit error floors, whereas the new decoders obtain more notable performance gains as the increase of Signal-to-Noise Ratio ( SNR) values.

仿真结果表明，随信噪比（Signal-to-Noise Ratio，SNR）增加，两种传统解码器均出现误码率性能平层，而新解码器获得了显著的性能改善。

It was required to analyze the image characteristics, to measure and calculate signal to noise ratio of the lung parenchyma and the muscle of thoracic wall individually, the contrast and contrast to noise ratio between the lung and the muscle of the thoracic wall.

肺实质与胸壁肌肉的对比度和对比噪声比。

In different signal to noise ratio ( SNR) and multi-path channel conditions, and compared with the traditional algorithm, the precision of improved timing algorithm is obviously improved.

在高斯白噪声和多径信道条件下，与传统算法比较，改进算法定时同步精度有明显提高。

Increase signal to noise ratio and so increase anti interference capability and appreciation accuracy of the G N Line Determination Meter.

在采用有源滤波的基础上，进一步利用数字滤波和对输入信号线性累加的软件处理，提高了信噪比，从而提高了G-N线检测仪的抗干扰能力和判断的准确度。

Signal amplification system designed partly based on the differential op amp amplifier circuit to improve the signal to noise ratio, increasing the signal common mode rejection ratio.

系统的信号放大设计部分采用了差分运放放大电路，以提高信号的信噪比，并增大信号的共模抑制比。

Signal to Noise Ratio ( SNR ) : The ratio of the signal to the random noise setdata.

全炉膛火焰的燃烧过程伴随着大量动态的随机噪声,这些噪声信号必须消除.

The relation between the wavelet threshold and the signal-to-noise ratio in wavelet image denoise is presented. From many simulations of wavelet image denoise, the unimodal property between the wavelet threshold and the signal to noise ratio ( SNR) under different noise strength was developed.

本文研究了小波图像去噪过程中阈值与信噪比的关系，通过大量的仿真得出了小波图像消噪过程中，在不同的噪声强度下，信噪比与小波阈值之间存在单峰性的特征。

What makes it different from the former adaptive threshold setting rules is that it is not based on the conventional CFAR criterion but on a novel constant equivalent signal to noise ratio ( CESNR) criterion.

与以往自适应门限设定方法不同的是，它不是基于传统的恒虚警概率判决准则，而是基于一种新颖的恒等效信噪比准则。

The results of field test showed that adopting cascade geophone pattern can be results of good continuation of phase, enhanced amplitude and high signal-to-noise ratio on the records.

实际野外试验结果表明，采用串联检波器串的方式所得记录的相位连续性好、振幅增强，信噪比较高。

Signal to noise ratio ( SNR) is required for maximum aposteriori probability ( MAP) decoder of Turbo codes, otherwise there is some loss of SNR. A new algorithm of SNR estimator is proposed, which is based on the high order statistic analysis.

Turbo码的MAP（最大后验概率）译码算法需要估值信噪比，否则会有一定的信噪比损失。

In the environment of low signal to noise ratio, the traditional synchronization schemes based on the correlation method can not match the strong error correcting ability of turbo code.

在信噪比极低的情况下，传统的基于同步码相关的方法已不能满足turbo码强译码能力的要求。

Companding is a useful technique for improving the signal to noise ratio ( SNR) over poor radio channels.

压扩技术作为提高伟输信号信噪比的有效手段，在通信系统中得到了广泛应用。

It improved the signal to noise ratio and data precision by the ways of time domain average processing and adding index window before model analysis.

在模态分析前，通过时域平均处理及加指数窗等方法来提高信噪比和数据精度。

It is a large-scale mixed-signal circuit with time-delay integration ( TDI) function to enhance the signal to noise ratio ( S/ N), and defective element deselection ( DED) function to decrease the probability of bad columns.

该读出电路是一个大规模混合信号电路，集成了时间延迟积分以提高信噪比，实现了缺陷像素剔除以提高阵列的可靠性。

Its major features include synchronous array remote surveys for different geographic coordinates points with high signal to noise ratio, high resolution and good effectiveness.

主要特点有：同步阵列遥测不同地理坐标点的电磁场，具有高信噪比、高分辨率和高效率；