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范围噪声
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  “范围噪声”译为未确定词的双语例句
    This module can process RF signal with amplitude from–90dBm to -10dBm, and the operating frequency range extends from 50MHz to 878MHz while providing over 80dB gain-control range and its noise figure is below 5dB. A dual synthesizer generates both local oscillator (LO) frequencies, providing superior phase noise performance of -82dBc/Hz at 1kHz.
    该模块采用具有高镜像抑制能力的二次变频接收方案,能在50MHz~878MHz的带宽内接收-90dBm~-10dBm的RF信号,并提供80dB的增益控制范围,噪声系数小于5dB;
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    The analysis based on noise spectrum have indicaded that the background noise in SSSRI cavitation Tunnel is rather lower, the higher signal-to-noise ratio can be obtained in the range of frequency about 500 Hz, the frequency range of propeller flow noise and the noise caused by various cavitation types can reach about 100 KHz, and there is still a higher SPL at 50 KHz.
    对其噪声频谱分析结果表明,上海船研所空泡水筒的背景噪声很低,在500赫兹以上的频率范围,噪声信号可获得较高的信噪比; 螺旋桨的流动噪声和各种类型空化噪声的频率范围则可达100千赫兹以上,在50千赫兹频率有较高的声压级。
短句来源
    A-weighted sound level and loudness are both criterions for noise level,but A weight ed sound level is a simple evaluation of noise and can not commendably reflect people 's perceiving to noise.
    A计权声级和响度是噪声评价的两种方式。 通过对响度计算原理的分析,对比分析出A计权声级在度量低频成分为主的噪声、离散噪声和语音频率范围噪声时会产生误差,使评价结果偏离人的主观感觉。
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  range noise
Below the lower critical dimension, there is a line marking the stability boundary between the short-range and long-range noise fixed points.
      
The stochastic part, including in particular the short-range noise correlations, is taken from images of the structure of real paper samples.
      
In contrast, for d>amp;lt;dLR, we find a "weak noise" regime dominated by short-range noise.
      
Wave scattering in a randomly inhomogeneous medium with long-range noise correlation function ~1/r
      
As mentioned in Section 3, anisotropic diffusion effectively reduces range noise and improves overall accuracy of our scans.
      
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An algorithm for filtering signal dependent noise in image by use of local statistics was proposed.

文章提出一种利用局部统计量消除图象中与信号强度有关的噪声的算法。用二段直线近似代表一个局部窗口中各象元灰度值的概率分布,因而使各局部统计量的计算大为简化,由于各象元可分別处理,因而本方法易于实时处理及并行运算。实验表明所提方法对较宽范围的噪声比现有的用局部统计量的算法效果有很大改进。

This paper presents a novel electronic equipment with which laser beam stability excelling 0.5% can be obtained, and its output noise in comparision with that obtained with an ordinary stabilized current power source can be reduced by about 20 dB in the acoustic frequency range.

本文介绍了一种新型电子学装置,它可以使小功率He-Ne激光器输出功率稳定度达到0.5%,在声频范围的噪声与通常稳流电源相比,可降低20 dB.

A theoretical model of ambient sea noise including surface sources and stratified ocean is discussed. The noise sources are assumed to be statistically independent directional acoustic sources situated on the surface, and the effects of ocean environment on ambient noise are studied. The normal-mode theory of surface-generated noise is developed, and the normal-mode formula of the directional density function suitable for small grazing angles is analytically continued to he consistent with the ray formula suitable...

A theoretical model of ambient sea noise including surface sources and stratified ocean is discussed. The noise sources are assumed to be statistically independent directional acoustic sources situated on the surface, and the effects of ocean environment on ambient noise are studied. The normal-mode theory of surface-generated noise is developed, and the normal-mode formula of the directional density function suitable for small grazing angles is analytically continued to he consistent with the ray formula suitable for great grazing angles. The unified formulae to calculate the intensities, spatial correlation and vertical directivity of ambient noise are presented.

本文讨论由海面噪声源与分层介质海洋所组成的海洋环境噪声模型。假设噪声源是统计独立分布在海面上的指向性点源,研究噪声源特性以及传播条件对海洋环境噪声场的影响。发展了海面噪声的简正波理论,并在一定条件下将简正波理论得到的适合于小掠角范围的噪声场方向密度函数解析延拓至大掠角范围,使之与射线理论表式衔接起来,获得了计算海洋环境噪声强度、空间相关与方向密度函数的简明表式。

 
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