查询词典 Signal-to-Noise

A new model for the received signal is established, and the received signal is the sum of two trilinear models.

文中建立了大时延扩展CD—MA信道下接收信号新模型，它将接收信号看成是2个三线性模型之和，并提出了广义三线性交替最小二乘的算法进行空时多用户检测。

Compared with the "three antibodies method", the sensitivity for detection of the signal of Y chromosome fluorescence in situ hybridization in brain tissue sections of mice was enhanced significantly by the direct tyramine signal amplification method.

结果 "三步抗体法"在脑切片检测Y染色体阳性信号的灵敏度和特异度分别为85.67％和100％；直接TSA法在脑切片检测Y染色体阳性信号的灵敏度和特异度分别为92.82％和100％。

Because of the importance of the detection of R-wave position, this paper also proposed a filtering method for exercise ECG signal, which is based on Wavelet Transform and Stein's Unbiased Risk Estimate. Our experimental results demonstrate that the myoelectric disturbances and baseline drift in EECG signal can be removed efficiently, which affords the solid foundation for the further evaluation and study of people's sub-healthy state in various vocations.

此外，由于心音和心电的所有参数分析都是基于心电R波的正确定位后进行的，作者结合小波变化和似然无偏估计，提出了运动心电信号的伪差消除法，经过实验论证，本算法能有效消除运动心电信号中的基线飘移和肌电干扰，为进一步研究分析评估不同行业人群的亚健康状态提供了新途径。

From the point view of mathematics, signal and image processing can be uniformly seen as signal processing.

从数学的观点看来，信号与图象处理也可以统一看作是信号处理。

The whole system is mainly composed of I~V conversion unit, the unit of orthogonal signal generator, the vector detection unit and the signal process unit.

该检测系统主要由I~V转换单元，正交信号发生单元，矢量检测单元和数据处理单元组成。

It shows that depth-weighted optical signal is different from the signal only on the top layer of tissue in velocity of upstroke, duration and amplitude and the discrepancy are enhanced with the increase of the probing depth especially in the spiral wave activity.

深度荧光组成的光动作电位与表层细胞光动作电位的上升速度、时程和幅值等有明显差异，其产生的原因和不同深度细胞的跨膜电位处于动作电位不同时期有关。

Variable gain amplifier is an analog circuit, which varies gain, adjusts signal dynamic range and stabilizes signal power.

可变增益放大器是模拟单元电路之一，起着变化增益、调整信号动态范围、稳定信号功率的作用。

The vector signal analysis is a type of signal analysis technologies arisen these years.

本文首先简单介绍了数字调制和数字解调原理和技术，介绍了数字调制信号的测量方法和原则。

Coherent interference can be suppressed by the EMCMVB efficiently. The EMCMVB first gets the modified signal subspace by using the estimated arrival angles of coherent interferers and the eigenstructure of the correlation matrix, and then projects the MCMVB weight vector onto the modified signal subspace.

EMCMVB是利用估计得到的相干干扰方向和阵列信号相关矩阵特征分解来得到修改的信号子空间，再把多约束最小方差波束形成器的权矢量向修改的信号子空间投影来得出新的权矢量。

The character of the system is as follow: the system can generate random wave signal, the frequency of output signal can be adjusted accurately, the stability of output frequency is very high.

本系统的主要特色：可以产生任意波形的信号，输出信号的频率可精确调整，且频率稳定度很高。

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％。