查询词典 signal to noise ratio

A phase-locked amplifier is used to improve the signal-to-noise ratio of photoelectricity signal, and a computer is utilized to incept the sampling sig...

用锁相放大器来提高光电信号的信噪比，信号被快速采样后由接口电路输入计算机，自动给出所测单模光纤的模场半径。

At last,this paper analyzed the influence of the inversive receiver to the chracteristic of the clutter and the ratio of signal power and the noise power ,discussed the effective detection of target signal in correlated clutter,and then put forward a new method naming multi-periods shift accumulation for detecting moving target when not knowing the exact movement parameter.

最后，本文分析了倒置接收对目标回波信噪比及杂波特性的影响，讨论了在相关杂波区对回波信号有效检测的方法。针对如何在弹目相对运动参数未知的条件下对高速运动目标进行积累检测这一问题，提出了一种多周期移位积累的新方法。

By removing the photocurrents caused by the ambient light among the noise-included signal light, the two photocurrents from the dual-junction sensor of the signal light was measured and their logarithmical ratio was first obtained.

通过对不同峰值波长和光强的高斯函数环境光下传统方法波长测量精度的仿真分析表明，环境光与被测光峰值波长相差越大、光强比越大，则测量结果的误差就越大。

In this system we improve the ratio between signal"s power and noise"s power together with the sensitivity of the system by a new temperature signal demodulating method.

在该系统中，通过采用新的温度信号解调方法，使系统的信噪比获得提高的同时，还提高了系统的测温灵敏度。

The experiment shows that CSELF is potentially valuable for earthquake research and prediction. It is also found that the recorded electric and magnetic component amplitude of CSELF signal varies depending on the distance and azimuth of the observatories relative to the transmitter. These amplitudes decline with increasing distance between observatory and transmitter faster within some space extent than those outside the extent. It may be easier for magnetic components to have higher ratio of signal to noise than for electric component.

试验还发现，各地震台站和流动测点观测的CSELF信号的强度，与台站或者测量的电、磁场分量相对于发射源的距离、方位有明显的关系；发现在离开发射源的相对近区，场强随距离的衰减，比在相对远区更快；发现接收磁场信号比电场信号较易获得更高信噪比的数据。

The signal processing of narrow-beam radars are in the given direction to which the beam is pointing, so the received interferences and clutters only come from that direction and thus the signal-to-noise ratio is relatively high, and target detection is only need to be performed on the range-Doppler spectra, which has a relatively low demand.

而宽波束雷达则会接收到所有方位上的干扰和杂波，信噪比较低，除了需要在距离-多普勒谱上检测出目标外，还需要分别形成目标的阵列快拍以获取其空间谱估计。

The system is based on optical heterodyne structure, and use half wave plate, quarter wave plate and polarization beam splitter to improve the intensity of Doppler signal and signal-noise-ratio.

系统采用了外差式纵向激光多普勒测量结构，利用1/2波片、1/4波片与偏振分光棱镜相结合及外差式参考光结构，有效地提高了多普勒信号的强度与信噪比。

The high signal-to-noise ratio and large dynamic range measurement of light signal returned from long distance is realized.

实现了对远距离弱光信号的高信噪比、大动态范围测量。

The wind profile radar received signal processed by the method can significantly improve the signal-to-noise ratio through the actual measurements.

经过实测，经此方法处理的风廓线雷达接收信号能够显著的改善信噪比。

The results show that the signal noise ratio of MFL signal was improved significantly.

结果表明，采用归一化最小均方自适应滤波方法可使缺陷漏磁信号的信噪比得到显著的提高。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。