查询词典 noise and disturbance

To some extent, it can eliminate most background noise, and enhance the ability of anti-disturbance of the tracking system.

在图像分割中采用了由粗到精的两步分割的策略。

Digital PLL's linear mathematical model is established, and it's stability is analyzed, then the DPLL's stability conditional expression is given. Whereas the phase lock in UPS is very particular, this dissertation emphasizes on the dynamic performance with disturbance of the utility source's frequency noise and the reference phase.

基于UPS 锁相的特殊性，着重分析了市电频率扰动以及相位给定突变时的系统动态特性，仿真分析表明在同一个数字锁相环中，锁相误差抖动小与输出频率变化不能过快，二者不可兼得。

A down-converting mixer fabricated with 0.18μm RF CMOS technology is designed for OFDM-UWB applications.Differing from conventional Gilbert cell topology,a differential topology is proposed and applied in order to reduce the noise contribution and disturbance from the large signal of the local oscillation,as well as to lower the DC consumption of the mixer.

设计了基于正交频分复用超宽带系统的下变频混频器（Mixer ，并采用0.18μm RF CMOS工艺，通过一种不同于传统Gilbert结构的新颖的双平衡结构来实现，以降低本振大信号对输出中频端的噪声贡献和干扰，降低混频器的静态直流功耗等。

In the precision detection of a millimeter wave, the encounter of the detector and the objects can not be forecasted totally because of a lot of noise and disturbance existing in the complex battlefield, it will cause fantasticality and distortion of the echo retaked by the detector, and the stably of the echo become bad, as a result, it will reflect the result of the detection, so it is necessary to filter the echo retaked by detector.

在弹载毫米波精确探测系统中，由于复杂多变的战场环境中存在大量的干扰及噪声，探测器与目标的交会姿态不能完全预测，造成探测器获取目标回波产生奇异和变形，回波特征的稳定性变差，从而影响了目标的探测和识别，因此对探测器的回波进行有效的滤波处理是十分必要的。

The main research of this paper is about the pre-amplifier used in thenuclear radiation examination, in view of gamma ray's characteristic affectionon the matter, the electric circuit's noise and disturbance are restrainedbased on the nuclear electron theory.

本文主要研究用于核辐射检测的前置放大器，针对γ射线与物质相互作用的特点，运用核电子学的理论解决电路中的噪声和干扰问题。

In the Ud noise and the disturbance ingredient by the low pass nature's ring circuit filter filtration, are formed the pressure controls the oscillator control voltage Uc.

Ud 中的噪声和干扰成分被低通性质的环路滤波器滤除，形成压控振荡器的控制电压Uc。

The analysis results showed that the strapdown approach will be faced to more error sources with sensor noise and motion disturbance. The simulation results verified this and indicated that the performance of the strapdown approach would not be as efficient as that of the direct approach.3. Analyzing the principle and error model of MEMS QRS gyro for the purpose of practical applications, the paper presented an autoregressive model for the gyro signal by means of time series theory.

应用牛顿力学原理分析了光电稳定跟踪机构的惯量耦合关系和动力学模型，推导了平台单轴伺服回路的控制方程，比较了直接稳定和捷联稳定方案在测量噪声和外部扰动共同作用下的性能特点，仿真结果表明，在同等噪声和扰动条件下，捷联稳定面临更多的误差源，因而最终的稳定精度较难达到直接稳定系统的水平。3。

When there is NO EQ reading there is just a straight line except for small wiggles caused by local disturbance or "noise" and the time markers.

当没有地震的时候，图上只呈现一条细微波动的直线，这些小波动的出现是因为存在局部干扰或者噪音和计时器。

When there is NO EQ reading there is just a straight line except for small wiggles caused by local disturbance or "noise" and the time markers.

当没有地震的时候，图上只有一条有细微波动的直线，会出现这些小波动是因为有局部干扰或者噪音和计时器的存在

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。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。