查询词典 signal noise ratio

As an assembled nanostructure, nanoelectrode ensembles or arrays present many advantages such as enhanced mass transport, lower double layer charging current, short time constant, lower electrolyte voltage drop, higher ratio of signal to noise, as well as good maneuverability, with high sensitivity and reliability in electroanalysis. Therefore, they have found broad applications in a variety fields including the study of electrochemical theory, biosensor, electrocatalysis and electrode materials in high energy chemical batteries.

纳米阵列电极作为一种人工组装的纳米结构体系，具有高传质速率、低双电层充电电流、小时间常数、小IR降及高信噪比、可操作性强和测量灵敏度高等优势，因而在电化学理论研究、生物传感器、电催化材料和高能化学电源电极材料等方面具有广阔的应用前景。

PbWO4 and CeF3 which are newly developed inorganic scinti1latr in our country have been studied. Photo-electricity detector systemes which have high γ sensitivity and relative insensitive to neutron and fast time response were assembled by using CeF3 and photomultiplier tube. The ratio of signal-to-noise for γ ray detection can be up to more than 10 times in close distance n,γ commix pulse radiation field by using this detector system.

对PbWO4和CeF3等近年国内新研制的无机闪烁体进行了系列研究，使用CeF3分别配光电倍增管和光电管，组合出了对γ辐射灵敏度高，对中子相对不灵敏，同时脉冲响应也快的光电探测系统，应用以此为基础的探测技术在近距离n，γ混合脉冲辐射场中，可将脉冲γ辐射探测信噪比提高一个量级以上。

Exact closed-form cumulative distribution function expression of the signal-to-noise-plus-interference ratio was derived. The average capacity of MIMO MRC systems with multiuser diversity was presented.

导出封闭形式的信号干扰噪声比的概率分布函数表达式和以平均容量的形式给出的系统多用户分集性能表达式。

A new set of appraisal system for the qualities of image enlarge is proposed with farther research based on gray scale,ratio of signal to noise,mean square error and absolute value of gradient.

进一步从灰度偏移、信噪比、均方误差和梯度模值4个方面，提出了一套衡量图像放大质量的评价体系。

The ratio of signal level to noise level is a very important index for VTR and the ...

信噪比是评价录像机性能的一个重要指标，而录像机的噪音主要来源于磁记录系统。

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 ratio of signal-to-noise is raised and the system reliability is improved by using the digital signal processing technology.

采用的数字信号处理技术，有效地提高了采样信号的信噪比，增强了系统的可靠性。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。