低压配电网电力线噪声可以分为背景噪声、与工频同步的周期性噪声、突发性噪声、窄频带噪声等。
The noises on low- voltage power networks are classified four types including background noise, periodic noise, burst noise and narrow band noise.
现场存在着各种各样的噪声，其中，白噪声和周期性窄带干扰是两类重要的干扰。
There have many kinds of noises in site, thereinto white noise and periodic narrowband noise are tow important noises.
根据推导结果设计了一种从白噪声中检测周期性信号的算法。
We design the algorithm to detect periodic signal from white noise by the derivation.
研究了利用该方法从连续周期性干扰和白噪声干扰中提取放电脉冲的可行性。
The possibility of picking up the discharge pulses from continuous periodical interference and white noise interference by this method is simulated respectively.
自适应预估器能用来提取宽带随机噪声背景中未知频率的周期性信号。
Self adaptive predictor is used to extract periodic signals with unknown frequencies from wide band random noise background.
我们发现噪声可以破坏瞬时电流的周期性并削减长时平均电流的峰值。
We find that external noise can destroy the periodicity of the transient current and cancel the long-time average current peaks.
泵输出的周期性脉动流体的压力脉动，是引起流体谐振、激励管路振动和噪声的主要原因。
The pressure pulsation induced by the pumped periodic pulsation fluid is the main factor of causing fluid resonance and stimulating pipelines vibrations and noise.
时域平均法是从混有噪声的信号中提取周期性分量的最有效方法。
The time domain average method is an efficient method to extract period components from the signal mixed with noise.
用短时傅立叶分析的方法研究了辐射噪声在高频段时频变化的周期性，估计了目标的螺旋桨转速。
Period characteristics of radiated noise at high frequency is investigated by a method based on short time Fast Fourier Transformation, and propeller speed is estimated.
通常检测的机械振动加速度信号，由于信噪比太低，即使存在周期性的冲击分量也往往被淹没在强的背景噪声之中。
However, in respect of a vibration acceleration signal, the signal to noise ratio (SNR) is often so small that the periodic impulse component is submersed in its intense background noises.
简要分析了陀螺输出信号的特点：噪声大、非线性、周期性，以及这些特点对检测有效信号的影响。
The characters of FOG's output signal which are with large noise, nonlinear, periodic and their consequences to the detection of the effective signal are analyzed briefly.
利用光学周期平均法能够清晰地描绘带有噪声的周期性图象。
Noisy images with a periodic structure can be cleared by utilizing optical periodic average method.
首先讨论了舰船辐射噪声的产生机理、构成和频率特性，指出螺旋桨噪声的振幅存在周期性调制。
First, the generation mechanism, components and frequency characteristic of radiated noise of naval ships are studied. There exists periodical modulation for the amplitude of propeller noise.
具体分析了以矩形光栅为例的周期性目标莫尔条纹式的混淆效应，以及非周期性目标噪声形式的混淆效应。
Moire effect as an aliasing phenomenon of periodic objects and aliasing contents as signal dependent noise of non-periodic objects are analysed.
但氡子体影响、系统噪声造成的数值不稳定、剂量率具有周期性的变化均会使数据出现波动从而造成无效的报警。
However, the radon and thorium daughters effects and the system noise and their periodic changes will result in fake alarm.
该辐射噪声可视为周期性激励与信道传递函数的卷积构成。
These noises can be considered to be composed through convolution of many kinds of excitation source and the transform function of oceanic acoustic channel.
该辐射噪声可视为周期性激励与信道传递函数的卷积构成。
These noises can be considered to be composed through convolution of many kinds of excitation source and the transform function of oceanic acoustic channel.
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