查询词典 noise

The additive noise factor has relation with SOA"s linewidth enhancement factor and it is always larger than one, which means that interferometer"s output signal-to-noise is different under different working mode. Adopting feedback working mode we can obtain higher signal-to-noise ratio. The experimental results prove the correctness of theory analysis.

该附加噪声因子和SOA线宽增强因子相关且始终大于1，说明在考虑SOA的噪声时干涉仪在两种工作模式下输出信号的信噪比是不同的，采用返回式工作模式能获得更高的信噪比，实验结果和理论分析相吻合。

A methodology of noise-like key generation is presented. Chaotic process of tentmap function is used as a deterministic generation of noise-like key, image storage and retrieval are completed in a algebraic form. A mathematics model of noise-like chaotic coding memory is constructed, meanwhile the basic mechanism of circulant convolution and circulant correlation in image information storage and retrieval are demonstrated.

在详细阐明数字序列和字母序列的1-D映射函数设计方法的基础上，利用构造出的1-D映射的稳定周期环和不稳定极限环完成了存储和联想记忆功能，为了识别有关的输入信息，提出了映射函数直接控制的方法；在此基础上，提出了一种1-D映射型混沌神经网络模型，该网络本身不当作一个"黑箱"处理，网络的参数值由网络中实现的映射函数来确定，该网络模型具有联想记忆、容错性、模式识别和奇异滤波等一系列智能信息处理的基本功能。

It is proved that these methods are valid and time domain filtering and noise estimation can reduce the ambient noise, and increase the signal-to-noise ratio.

结果表明：时域滤波和噪声估计方法能够较好的压制背景噪声，提高处理结果的信噪比。

In digitizing analogue signals, the digital signal is corrupted by the noise due to the inherent noise of the sampler and the quantizing noise.

在这两个过程中，由于采样器固有噪声和采样脉冲抖动噪声以及量化噪声等因素的影响，采用量化后的数字信号中含百噪声。

By means of analyzing the noise error, it is proposed to use an algorithm of singular value decomposition total least squares to conduct the interharmonics estimation, namely taking the noise interference at both sides of the matrix equation into account simultaneously and solving the minimum norm problem by least square method under such condition. In the proposed algorithm by means of singular value decomposition of a new augmented matrix and by use of a simple and practical method to determine the number of principal singular value related to signal to noise ratio, the storage calculation of right singular matrix is performed, thus a more accurate frequency estimation of interharmonics can be obtained.

通过分析噪声误差，提出采用奇异值总体最小二乘(singular value decomposition total least squares，SVDTLS)算法进行间谐波频率估计，即同时考虑矩阵方程两边的噪声干扰，采用SVDTLS算法求解该情况下的最小范数解，通过对增广矩阵进行奇异值分解(singular value decomposition，SVD)，采用简单实用的与信噪比相关的主奇异值个数确定方法对分解的右奇异矩阵进行存储计算，得到了较精确的间谐波频率估计结果。

The auxiliary variable system was constituted, and the recursive algorithm that can reduce the measurement noise interference has been developed. The bias property of LS with input/output measurement noise has been derived, and the self-adaptive deviation compensation principle of measurement noise variance has been proposed, and the corresponding algorithm is designed. The influence of parameters of wavelet modulating on estimation precision is investigated with simulation examples.

2构造了能降低测量噪声干扰的辅助变量系统及递推算法，研究了输入输出端测量噪声影响下最小二乘估计的偏差特性，提出了两种基于测量噪声方差估计的自适应偏差补偿原理并设计相应算法，用仿真算例研究了调制滤波器参数对辨识精度的影响。

The picture noise, invisible sensation, is usually distinctly different from its adjacent picture dots, performing to be white plague on black matrix or dark spots on white area. This noise influences the image's visual effect and relevant processing operation. Thus it is acquired to eliminate the noise of the picture.

图像噪声在视觉上通常与它们的相邻像素明显不同表现为黑区域上的白点或白区域上的黑点，影响了图像的视觉效果和有关处理工作，因此需要对图像中的噪声进行消除。

A detailed analysis of the noise and mismatch of the capacitive readout circuit is given. The analysis and measurement results have shown that thermal noise dominates in the proposed circuit, and several approaches should be used for both noise and mismatch optimization.

文中详细分析了电容读出电路中的噪声与失调，并同测试结果证实了热噪声的主导地位，进而提出了针对噪声和失调进行优化的方法。

In accordance with the pictures which are polluted by two different types of noises---salt-and-pepper noise and Gaussian white noise, the thesis analyzes the parameters in PCNN algorithm one by one in detail, and reaches some serviceable conclusions, pointing out there exist some differences in choosing parameters of the model when removing the salt-and-pepper noise and Gaussian white noise.

本文的工作取得了以下三方面的新进展：(1)在对二值图像进行去噪处理时，针对被两种不同类型的噪声——椒盐噪声和高斯白噪声污染的图像，对PCNN算法中的参数进行逐个地详尽地分析，得出了一些有用的结论，指出当算法具体应用于去除椒盐噪声和高斯白噪声时，参数的选择存在着区别。

Since the glint noise is a low-frequency noise and its bandwidth is usually lower than that of flight control system, therefore low pass noise filtering is not practical for guidance command and noise are not distinguishable.

闪烁杂讯属低频杂讯，通常比飞控制系统频宽还要低，无法与导引命区分，所以能只用低通波器将其除。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。