We have special software to analyse these signals, because when you look at celestial objects through the equipment we have, you also pick up a lot of noise.
我们有专门用来分析信号的软件，利用它可以去掉观测过程中带入的噪音。
By analysing the causes of the machinery impact noise, the authors of this paper mainlydiscuss how to analyse it by the technique of impact stimulation both in theory and practice.
本文从分析机械性冲击噪声的发生机理和影响因素入手，论述了用冲击激励技术分析机械性冲击噪声的理论和方法，并进行了实验验证。
The exhaust systems play the important role of controlling the engine exhaust noise, so it is necessary to simulate and analyse the characteristics of the exhaust system.
排气系统具有控制发动机排气噪声的重要作用，所以对发动机排气系统进行仿真分析很有必要。
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