查询词典 noise-power-ratio

The noise pollution survey revealed a rather surprising and possibly amusing oldfashioned source of noise.

这个有关噪声污染的调查还揭示了一种出人意外而同时可能会引人发笑的老式噪音源。

In the present study, CHL cells were cultured routinely in MEM medium for 3 days. Then the cells were treated with sham exposure , 0.4mT 50 Hz sinusoidal MF , 0.4mT noise MF and the combined noise and 50Hz MF for 3 min and 15min, respectively. After exposure, the cells were lysed, and the proteins were extracted.

实验中，将中国仓鼠肺成纤维细胞分别经0.4mT工频磁场、等强度的噪声磁场、工频磁场与噪声磁场的复合磁场辐照及假辐照处理3min和15min后，裂解细胞，提取细胞蛋白质，以Western印迹技术，测定并比较细胞内SAPK磷酸化的变化。

On the basis of characteristics of the electric circuit, theoretical analysis has been given about noise and bandwidth of the PMT preamplifier circuit, and theoretical formulas for noise and bandwidth have also been presented in this paper.

根据所研制电路的特点，论文还对光电倍增管前置放大电路的噪声和带宽进行了理论分析，给出了噪声和带宽的理论计算公式。

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。

In the arrangement described herein the quantisation noise and the thermal noise are reduced together.

在此所描述的设置中，量化噪声和热噪声一起被减少。

Based on the analysis of clipping noise and quantisation noise in Discrete Multitone systems, criterions and methods to optimize the clipping rate in DMT systems are presented in this paper.

文章对于离散多音DMT系统中量化噪声和削波噪声进行了详细的分析，提出了DMT系统中进行削波率最优设计的原则和方法。

One of the difficulties in phase noise filtering is how to remove the noise and preserve the sharp sawtooth profile of the fringe effectively.

为了获得高质量的干涉SAR图象，必须对噪声进行有效抑制，同时应该保持干涉SAR图象的分辨率。

This paper describes a novel neutron noise technique suitable to fast reactors, which is known as the thermalizaion analysis of the neutron noise of fast reactors.

本文提出了一种新的快堆中子噪声技术，称为快堆中子噪声的热化測量技术。导出了这一技术的理論关系式。

Combined with the traditional radar jamming, this article analyzes the smart noise jamming and cites four smart noise jamming patterns: coherent in-pulse suppressing jamming, intensive false targets with frequency-shift, front edge replication jamming and equal-partition pulse sampling jamming.

本文结合传统的雷达干扰方法，分析了当前热门的灵巧噪声干扰，选取了四种灵巧噪声干扰样式：相参脉内压制干扰、基于移频的密集假目标干扰、前沿复制干扰、脉内等间隔取样干扰。

With Linear Time-Invariant modeling of phase noise and definition of"effective resistor", we analyze the critical parameters of the circuit and calculate the value of phase noise at the 1 /f~2 region. 3. A 4.2GHz VCO tuned by an accumulation-mode MOS varactor in TSMC 0.35μm SiGe BiCMOS process is obtained after debugging with the simulator SpectreRF.

以低压、低功耗、低相位噪声和较大调谐范围的设计目标对压控振荡器进行设计优化，最后得到由积累型MOS变容管调谐的压控振荡器，电源电压为1.5V，功耗约10mW，中心频率为4.2GHz，调谐范围为28%，在频率偏移量为600kHz处的相位噪声为-128dBc/Hz，与线性时不变模型下的理论推导结果非常接近。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。