查询词典 noise

The signals during transformer impulse test are considered to be evolving in time, also is non-stationary signals, so we can design a software algorithm for noise reduction based on discrete Gabor transform, and the basic principle is: The Gabor coefficients of Effective signals during transformer impulse test is centralized in the time frequency range, and the peak-to-peak value is big, whereas the noise Gabor coefficient distribute in the entire time frequency range equally, the peak-to-peak value is small, we can realize the desired signal and the noise separated through frequency mask function.

考虑到冲击试验中的信号都是时变信号，也就是非平稳信号，因此设计了一种基于离散GABOR变换的软件滤波算法对冲击信号进行滤波，其滤波理论依据是：有效信号的Gabor系数在时频域分布比较集中，幅值比较大，噪声的Gabor系数均匀分布于整个时频域，幅值较小，通过构造时频掩模函数来实现有效信号与噪声的分离。

Although mid-value filtering is often used to eliminate seismic information noise, it does not have good effect on noise elimination because of its high requirements for noise-eliminated information.

中值滤波是地震资料去噪处理中的常用工具，由于其对去噪资料有较严格的要求，使去噪效果不甚理想。

Simulation is be done for all various noise density from 10% to 95%, and the results show that the proposed algorithm can restrain salt-and-pepper noise with detail-preserving, especi all y for high noise level.

我们对密度在10%~95%的各种噪声强度的情况进行了仿真，结果显示本文提出的算法能在有效地抑制噪声的同时完好地保持图像的细节信息，尤其在高噪声密度条件下显示了良好的噪声抑制效果和细节保持能力，显示了算法的稳健性。

Apply basic principle of control mechanical noise to measures had been put forward to reduce vibration and noise, and idle of the wood surface planer was remarkable reduced after the measures of reducible vibration and noise were used.

运用机械噪声控制的基本原理提出了减振降噪措施，试验证明，采用这些减振降噪措施后，木工平刨床的空转噪声有了显著下降。

Article 17 Muffling or vibration-proof measures shall be taken against the mechanical equipment, motor vehicles, catering and entertainment places and other sources of noise that produce noise or vibration, and the noise or vibration must meet the relevant standards.

第十七条对产生噪声和振动的机械设备、机动车、饮食娱乐服务场所以及其他噪声源，应当采取消声防振措施，其噪声和振动必须符合有关标准。

Methods 22 parients(35 ears)had been tested in three noises, including white noise,speech noiseand babble noise.BN was recorded when 8～12 persons were talking at same time.The monosyllabic phonetic balance word list was made by Shen Ye in 1983 and every list includs twenty-five words,Meantime ,the effect to speech discrimination score curve was tested in different signal to noise ratio.

目的 为了观察传导性聋患者在噪声竞争下言语清晰度曲线及不同噪声对清晰度曲线的不同影响；方法测试22名(35耳)传导性聋患者三种不同噪声竞争下测得的言语识别率结果，这三种噪声为①白噪声(white noise，WN)，②言语噪声(speech noise，SN)，③多人谈话声(babble noise，BN)，即由8～12人同时讲话录制而成，其频谱与言语长时平均频谱接近。

The application of noise removal for EEG signals based on wavelet transform is discussed in the paper,And the influence on EEG noise removal using different wavelet basis is introduced,Furthermore the wavelet soft-thresholding method and 1-Dimensional wavelet single-branch reconstruction are used for removing noise in EEG.

摘 要 摘要本文探讨了小波变换在脑电去噪中的应用方法，介绍了不同小波基对脑电去噪的影响，比较了小波软门限法和一维小波单支重构去噪方法的去噪效果。

Random noise for a fiber optic gyro mainly consists of wh ite noise and1/f γ fractal noise, which characterized by longˉterm correlation, selfˉsimilarity and1/f γ spectral density with 1/fγpower law.

光纤陀螺随机噪声中包含了白噪声和具有长程相关性、自相似性及 1/f γ类型谱密度特点的一种非平稳随机噪声———1/f γ类分形噪声。

To eliminate the disturbance of the noise (particularly the pulse noise and salt-and-pepper noise influence which causes by equipment and transmission) in image processing, a smooth operation is needed. In this paper we have analyzed several smooth operation methods and improve median filter method by a directional way to reduce the detail loss of smoothing process.

为在图像处理过程中去除噪声的干扰（尤其是由设备和传输引起的脉冲噪声和椒盐噪声的影响），首先对图像进行平滑操作，本文对常用的几种平滑滤波方法进行了分析，选择使用中值滤波方法，并使用边缘的方向信息对其进行了改进，以减少平滑过程中的细节损失。

When detecting the edge, an auto-choose threshold algorithm is given to reduce the salt-and-pepper or pulse wrong edges. After analyzing the special noise factor in pin's image, this paper improves the edge detection elements. That's putting forward a way which is named"the method of de-noise based on linear weighted operator template"to reduce the zonal or cluster noise. And test show that the algorithms detect image's edge rightly.

针对钻针图像的特点，在边缘检测中提出了自动选择阈值的算法；之后针对钻针图像中的特殊噪声形式，对边缘检测算法进行了原理上的改进，通过对图像的灰度分布的数学模型的建立，提出了使用加权直线模板去噪法进行块状噪声的去除；通过上述算法的应用，良好地改善了图像处理的质量。

The dissecting of samples in group2 were difficult. The root of pulmonary artery and ascending aorta failed to be unfolded because fibrous tissue was tough, right and left fibrous trigone were too firm to be solved by hand. Cardiac muscle fibers couldn't be stripped along myofibrillar trajectory since they were prone to break because of their friability.

组2的心脏解剖困难，表现为纤维组织坚韧，游离肺动脉非常困难；徒手无法松解左、右纤维三角，肺动脉和主动脉根部的游离非常困难；心肌纤维坚硬、质脆，解剖时容易断离成碎块，无法沿纤维走行方向剥离。

We have battled against the odds in a province that has become increasingly violent.

我们对在一个争夺日益激烈省的可能性。