查询词典 noise

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。

Noise in optical coherence tomographic imaging degrades the quality of images, so improving image's signal-to-noise ratio is a focal problem in the development of OCT system.

光学相干层析成像过程中产生的噪声恶化了其成像质量。提高图像的信噪比一直是光学相干层析系统研制中一个焦点问题。

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。

These include short noise of light resource and detector, Raleigh backscattering noise, optical Kerr effect and Faraday effect.

这些干扰因素包括光源和光探测器的散粒噪声、瑞利背向散射、光克尔效应、法拉弟效应、温度波动和偏振效应等等。

This article adopts LOG operator as edge-detect operator. First, Guass operator is used to smooth the original image and reduce the noise, then Laplace operator is applied to the result smoothed, thus the anti-noise function of the algorithm is improved.

本文采用LOG算子作为边缘检测算子，首先对原始图像用Gauss函数平滑去噪，然后用Laplace算子作用于平滑后的结果，提高了算法的抗干扰性。

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。