The results show the proposed algorithm is better than common RWPT and node threshold method, especially for the speech contained periodic noise.
结果表明，算法优于传统实小波包变换及点阈值算法，尤其对含周期噪声的语音信号，双树复小波包变换算法的优势更为明显。
The noises on low- voltage power networks are classified four types including background noise, periodic noise, burst noise and narrow band noise.
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 statistic of wavelet transform coefficient algorithm can solve the periodic noise, high-energy noise and some non-Gauss noise simply and effectively;
统计算法在解决周期信号、高能噪声和高斯信号方面有独特之处，能简单有效提取以上噪声的特征；
An image pre-processing techniques based on Wiener filter and normalization of image brightness is proposed for weaken the influence of periodic noise and brightness variation.
提出维纳滤波与亮度归一化相结合的图像预处理技术，去除固定模式噪声和亮度变化的影响。
We design the algorithm to detect periodic signal from white noise by the derivation.
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。
The fault characteristic periodic signals of the rolling bearing are in low frequency band and often buried in the noise.
反映滚动轴承故障的特征周期信号处于较低频带内，容易被噪声淹没，难以检测。
Self adaptive predictor is used to extract periodic signals with unknown frequencies from wide band random noise background.
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。
Signal detection system based on chaos theory has the critical sensitivity to periodic signal and the immunity to the strong noise, which can be used in weak signal detection area.
基于混沌理论构建的信号检测系统具有敏感微弱周期信号和对噪声有强免疫力的特点，用于微弱信号检测领域优势明显。
The results of experiment show that dreath sound sources are random white noise, Abnormal breath sounds sources are sequence of periodic impulses.
实验结果表明：正常肺音音源为白噪声，异常肺音音源为周期脉冲序列，肺胸系统相当于声低通滤波器。
A new approach to extract weak periodic signal from strong noise is proposed to pick up some weak signals in the fault diagnosis of mechanical equipment.
为提取机械设备故障诊断中的某些微弱信号，给出一种新的提取强背景噪声中微弱周期信号的方法。
The pressure pulsation induced by the pumped periodic pulsation fluid is the main factor of causing fluid resonance and stimulating pipelines vibrations and noise.
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 periodic oscillators at critical state are immune to noise and have sensitive dependence on weak sine signals or phase-coded signals at the same time.
临界混沌状态的周期振子对噪声具有免疫力，而对微弱的正弦信号或相位编码信号比较敏感。
In laboratory study, all kinds of noise including chaotic noise, are needed to be generated, which iterated with weak periodic signal is used to be signal source.
实验室内研究需要产生包括混沌噪声在内的各种噪声，并叠加微弱周期信号作为微弱信号检测系统的信号源。
This shows that the heart beat signal of fetal is not signal of noise, not periodic signal, but the signal, which may follow some dynamical laws.
这说明胎儿心率信号不是噪声，不是周期信号，可能是服从一定动力学规律的信号。
It is investigated that the characteristics of stochastic resonance of the periodic pulse signal added Gaussian white noise through a threshold system.
研究含有高斯白噪声的周期脉冲信号，通过阈值系统后的随机共振特性。
There have many kinds of noises in site, thereinto white noise and periodic narrowband noise are tow important noises.
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。
Finally, by using residuals instead of periodic pulse excitation - random noise binary excitation, s the quality of synthesized speech has been some upgrading.
最后，通过使用残差激励代替周期脉冲—随机噪声二元激励，让合成语音的质量得到了一定的提升。
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.
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。
The spread spectrum (SS) signal is modulated by high-rate pseudo noise code, and belongs to typically periodic signal.
被高速伪随机码调制的扩频信号，其伪随机码是具有随机编码信号特征的周期信号。
A periodic or continuous check of such channel characteristics as delay distortion, frequency response, and noise in an effort to reduce or eliminate the causes of errors.
周期性地或连续地检验通道的某些性能，如延迟失真、频率响应及噪声等，以便消除或减少引起错误的原因。
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.
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 noise and loss of the system, as well as the coupling ratio, make different effects upon replication effect of optical periodic pulses.
耦合器分光比、光纤环形腔中的损耗和噪声对复制效果有不同的影响。
However, the radon and thorium daughters effects and the system noise and their periodic changes will result in fake alarm.
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。
Moire effect as an aliasing phenomenon of periodic objects and aliasing contents as signal dependent noise of non-periodic objects are analysed.
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.
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。
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