查询词典 signal noise ratio

Results The system can produce stable signal of exact frequency according to GBZ49-2002 Diagnostic Criteria of Occupational Noise-induced Hearing Loss to output stability of the frequency and intensity of the audio signal, and the specific context of the noise pre-exposure function with screening of hearing impairment was achieved automatically.

结果：该系统经过标定，能够按照《GBZ49-2002职业性听力损伤诊断标准》输出稳定频率和强度的音频信号，实现听力损伤自动筛查以及特定背景的噪声预暴露功能。

As we know, if one mode of the electromagnetic field is prepared in a squeezed state, the quantum fluctuation of one of its quadrature components can be lower than that of the corresponding part in a coherent state and that of the other is higher, and we can tune the signal-to-noise ratios of its quadrature components: one of the quadratures can be used to absorb the quantum-mechanical noise, while the other one serves to transmit an extremely well-defined signal.

由于压缩态中光场某一分量的量子涨落可以小于相干态中的量子涨落，即可以小于量子涨落的最小值，因此可以用来改变信号传递的信噪比，从而在低噪声通讯、弱信号探测、高精密测量等方面具有重要的应用前景。

Initial growths of disturbances are measured by means of hot-wire anemometry. Due to the detected signals with low signal to noise ratio, the coherence function is used to eliminate background noise during data reduction.

在扰动增长的初始阶段，信号的信噪比非常地低，根据相关谱分析方法，应用相干函数，将扰动信号有效地提取出来，测量了初始扰动的增长。

It is shown that the new MMSE-based method outperforms zero forcing equalizer. It can mitigate the intersymbol interference and depress the noise amplification effect simultaneously, and subsequently maximizes the signal to noise ratio of the system at the receiver.

该均衡算法的性能要明显好于基于ZF准则的方法，并且在消除ISI的同时可以抑制噪声的影响，从而使系统的输出信噪比达到最优，而增加的复杂度很有限。

However, please be noted that high sensitivity will allow the interfusion with exterior noise irrelevant to the quantity to be measured, which will be also amplified by the system. As a result, the accuracy of measurement is affected. So, the senor itself should have high signal to noise ratio, to reduce the exterior interfering signals as much as possible.

但要注意的是，传感器的灵敏度高，与被测量无关的外界噪声也容易混入，也会被放大系统放大，影响测量精度，因此要求传感器本身具有很高的信躁比，尽量减少从外界引入的厂忧信号。

Lecturing the technical requirements and constitution of light transmitter and receiver; the theory of noise of light receiver; analytic theories of signal/noise ratio and bit error rate for digital light receiver; technique of coding and decoding of line.

讲授光发送机和光接收机的组成及其技术要求；光接收机的噪声理论；数字光接收机的信噪比和误码率分析理论；线路编解码技术。

It contributes to the noise figure of the EDFA which causes loss of signal-to-noise ratio.

放大的自发发射可以对引起信噪比损耗的EDFA噪声指数产生影响。

The loss of signal-to-noise ratio was used in comparing the noise performance of holograms before and after fixing.

探讨了双色存储全息图的图像保真度，采用信噪比损失描述双色固定过程对全息图像的像质影响。

The algorithm has overcome some problems of traditional algorithm such as more constraint conditions, depending prior knowledge, calculation complexity and noise susceptibility, and can be applied into the different restored image, and effectively overcomes the difficulties to determine noise-signal power ratio of Wiener filtering.

该算法利用微粒群算法的快速搜索能力和模拟退火算法良好的全局收敛性能寻找最佳复原图像，克服了传统的图像复原方法存在较多约束条件、依赖先验知识、计算求解复杂和对噪声十分敏感等不足，能应用于不同类型退化图像的复原，并能有效地解决经典维纳滤波算法噪信功率比难以确定的问题。

The results obtained from three different methods—the conventional numerical differentiation, the discrete wavelet transform method and the proposed continuous wavelet transform method were compared, it was demonstrated that the results are similar for signals without noise, but the signal-to-noise ratio of the result obtained by the CWT method is improved greatly comparing with the former two methods for noisy signals.

通过数值微分法、离散小波变换法及连续小波变换法对模拟信号的求导结果表明：对于无噪音的信号，三种方法的结果相似，而对于含有噪音的信号，连续小波变换法所得结果的信噪比明显高于前两种方法。

Liapunov—Schmidt method is one of the most important method in the bifurcation theory.

Liapunov—Schmidt方法是分叉理论的最重要方法之一。

Be courteous -- even when people are most discourteous to you .

要有礼貌──即使当別人对你最不礼貌的时候。