查询词典 noise-power-ratio

In this paper, common preamplifiers were introduced. To obtain the biggest output signal of the noise ration, we choose the low noise tube as the pre-amplifier according to best source resistance match principle.

本文以热释电探测器的前置放大电路为例，主要根据最佳源电阻匹配的原则选择低噪声晶体管，作为前置放大器，以得到最大的输出信噪比。

Based on the fundamentals presented in the part Ⅰ, this part of the paper,focused on the experimen tal analysis in contrast with the acoustic characteristics of boilover premonitory noise and the typical fire field environment noise, and a set of speci...

本文则在第一部分的理论基础之上，重点分析了扬沸前兆噪声和典型火灾现场环境噪声的声学特性，从其中寻找出能有效地进行扬沸火灾监测预报的一些特征物理量。

Finally, in order to eliminate the effect of the noise and improve the separating performance of the algorithm, a novel method is proposed according to the model of the probability density function of the noise.

另外，为了消除噪声影响，改善算法的分离性能，根据噪声的概率密度模型，提出了一种改进方法。

In the analysis of mechanical noise sampled from urban environment, many samples of noise present non-Gauss probability distribution.

在对城市环境下采集的实际机动噪声的分析中，发现许多样本的概率分布是非高斯的。

To understand the flow noise generation mechanism of pump jet propulsor, this paper calculates the flow field of a torpedo pump jet propulsor,analyzes the field structure, and then calculates its broadband noise with Proudman theory.

随着理论计算方法的逐步完善以及计算资源的增强，对流动噪声进行理论数值分析已逐渐可行并成为深入了解声源传播途径、噪声产生机理及噪声声级预报的重要手段之一。

This indicates that LBO is playing the role of polarizer in the laser cavity. According to this conclusion and the comparization among various methods of lowering laser noise, a new method inserting both a quartz whole-wave plate and an etalon to lowering laser noise is introduced.

根据这个结论以及各种降噪方案的比较，提出了自己的一种新方案，即在腔内同时插入一个全波片和一个标准具进行双选频降噪的方案，其中全波片和LBO构成双折射滤波片。

This is the MATLAB software have a function of Gaussian white noise, through the parameters you need to be white noise, at the same time can be used to study the methods of random signal generator.

详细说明：这是MATLAB软件中的产生高斯白噪声的函数，通过参数设置得到你所需要的白噪声，同时可以用于研究随机信号产生的方法。

The strange noise caused by vibration detecting module. The system can save and redisplay various engine strange noise wave, which can provide analysis basis for failure diagnosis, and users can judge some failure by compare these waves with normal wave.

振动异响测试模块：通过对发动机各种异响波形的存贮、重显，并与标准异响波形对比后，可判断出多种常见异响故障，为故障诊断提供分析依据。

In order to cancel the noise in TDR signal and retain the faint reflectometry signal made by deformation of rock and soil, it is proposed to use method integrated filtering and noise canceling based on wavelet transform with characteristic of TDR signal.

为去除TDR法岩土体变形监测信号中因多种原因而产生的噪声，同时最大限度地保留岩土体因变形而导致的微弱反射信号，提出结合小波函数和TDR监测信号特点的滤波与去噪方法。

Combined the expressions with the proposed z-domain model, the timing jitter of CP-PLL output related to different noise sources in the loop are also investigated in z-domain: Residue theorem is adopt to simplify the calculation, and optimize the noise bandwidth in terms of the PSDs of VCO and input reference clock, which is instructive to design the loop parameters.

在此基础上，结合新型z域模型求解了CP-PLL环路中的噪声抖动问题：利用复变函数中的留数定理，解析地给出不同噪声源情况下，PLL的抖动大小，得到了最优噪声带宽，为电路的环路参数设计提供了理论指导。

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％。