查询词典 trouble back signal

Aiming at the signal processing problems that exist in online fault diagnosis for train running gear, based on discussing the principle of characteristic spectrum analysis, a method of full period and uniform angle sampling is applied, which transfers the vibration signal from time domain into angular domain. The angular domain signal is transferred into corresponding characteristic spectrum using FFT. Through spectrum estimation and analysis, fault characteristic spectrum values of running gear components are acquired to distinguish their faults.

在讨论特征分析方法原理的基础上，针对机车走行部故障在线监测过程中存在的信号分析与处理问题，运用整周期等角度采样方法将时域振动信号转换为角域信号，采用FFT变换将角域信号变换为对应的特征频谱，通过谱估计、谱图分析得到机车走行部各零部件的故障特征谱值，再根据该特征谱值识别机车走行部各零部件的故障。

Two new functions based on the property of bubble wavelet are proposed. An approximate 2nd derivative of an analytical signal can be obtained by applying n times of the wavelet transform to the signal, the signal-to-noise ratio can be enhanced greatly.

根据小波的定义和墨西哥帽小波的一些特点提出了两种简单的窗口函数，利用它们对模拟高斯信号求2n阶近似导数的同时滤除了噪声，同时还可分离重叠峰，并讨论了尺度因子对变换结果的影响。

Combining the definition of CWT and the derivative property of convolution, we constructed a general method to calculate the approximate derivative of signal through CWT by using the first and second derivative of Gaussian function, Haar, and the first derivative of three-order-Spline function as wavelets. As compared with the other approaches of calculating derivative, which include the numerical differentiation, polynomial filters, Fourier transform, and the recently proposed DWT method, fast calculation and simple mathematical operation were remarkable advantages of CWT method. For the signal corrupted by severe noise (Signal-toNoise Ratio=5), the satisfactory results could also obtained via CWT method through appropriately adiusting the dilations.

在此基础上，(1)结合连续小波变换的特点和卷积的微分性质，提出了使用Gaussian函数的一阶和二阶导数，Haar和三次样条函数的一阶导数作为小波函数的连续小波变换计算信号近似导数的一般性方法，与其他导数计算方法(包括数字微分法，多项式滤波法，Fourier变换法和离散小波变换法)相比，本法简单便捷，计算速度快，对于噪声含量较高的信号(S/N为5)，只要适当调节尺度即可获得比较满意的结果。

Speaking from the function, the long-distance image surveillance system can be divided into two parts. The first part is a module of signal gathering and control. It uses AT89C51 as the main processor, which includes sensor signal measure, autodial, circuit state measuring, DTMF signal decoding, and automatic control.

从功能上讲，远程图像监控系统大至可分为两部分：第一部分是以A789C51为主处理器的信号采集和控制单元，包括传感器信号检测、自动拨号、线路状态检测、DTMF信号解码和自动控制五个小模块，用以实现对现场信号的采集、自动拨号报警和远程控制。

The bridge loses balance and sensitive parts have a output signal,which will transform to related current signal after differential magnifying and conversion between current and voltage. Linear 4~20mADC standard signal is formed by compensation of magnifying and non-linear rectified ring circuit ,and second temperature compensation.

输出的电信号，经过差分放大，电压电流转换，变换成相应的电流信号，通过放大和非线性矫正环路的补偿，以及精密的二次温度补偿，产生与输入压力输成线性关系的4~20mADC 二次制标准信号。

The input signal is divided into signal blocks, which are processed to provide an estimate of a short-time perceptual band spectrum of the input signal.

输入信号被划分成若干个信号块，对这些信号块进行处理以提供输入信号的短时间感知带谱的估计值。

Decomposition to plane circuitry's pin, then aborative go along transmit and insulate inspect, eliminate circuitry malfunction. Aborative analyze to design circuitry, find out join circuitry of flap electric operation system with undercarriage control and beaconage's join circuitry existed circumfluence phenomena. Bring about when undercarriage control signal system electrify inspect, under flap system are not power supply, current from undercarriage signal breaker come by undercarriage signal box, to flap system's flap control box, flap electromagnetism clique form loop. Lead to the flap put down under flap system are not power supply. Design principium existing serious limitation, put forward ameliorate project.

通过对机上线路的插头进行分解，进行导通和绝缘检测，排除了机上线路故障；通过对设计线路进行分析，发现在襟翼电气操纵系统与起落架收放操纵及信号系统的交联线路存在回流现象，致使在起落架收放操纵及信号系统通电检查时，襟翼系统不供电的情况下，电流从起落架信号断路器经过起落架信号盒，到襟翼系统的襟翼控制盒、襟翼电磁阀形成回路，导致襟翼在不给电的情况下被放下，设计原理存在严重的缺陷，提出了改进方案。

The processor (1) is operable to generate the bias setting signal (3) and thereb y control the biasing circuit (6) to dynamically bias the sensor such that the signal characteristic of the output signal is maintained in a target range.

所述处理器(1)可操作用于产生偏置设置信号(3)，由此控制偏置电路(6)以动态地偏置所述传感器(10)，从而所述输出信号的所述信号特征被保持在相对小的目标范围内。

Abstraction :This paper analyzes the principle of Butterworth digital filter,discuss bilinear transformation method of filter design;record a piece of voice by Microsoft voice recorders, carry on its a time-domain analysis, spectral analysis;then design a specified Butterworth band-stop filter based on the theory of bilinear transform,analyze the filter by the tool named Fvtool;and filter the voice signal acquired by voice recorder.finally compare its characteristics of frequency domain and time domain,study the applications of Butterworth filter in digital signal processing ,in particular in signal denoising.

本文分析了巴特沃思数字滤波器的原理，探讨了双线性变换法设计滤波器的方法；用微软录音机采集一段语音，对其进行了时域分析，频谱分析；然后使用双线性变换法设计了一个的巴特沃思带阻滤波器，并且使用fvtool对设计的滤波器进行分析；然后利用该滤波器对采集的语音信号进行滤波。最后对比滤波前后的语音信号的时域和频域特性，研究了巴特沃思滤波器在信号处理尤其是信号滤波去噪方面的特性和应用。

The performances of noise jamming, pulse jamming, shift-frequency jamming, range pull off jamming on pulse compression radar signals are analyzed in this paper, which include the linear frequency modulation signal, the binary phase-coded signal and the compound signal of LFM and BC.

针对线性调频信号，二相编码信号以及由线性调频信号和二相编码信号构成的混合信号这几种脉冲压缩雷达信号，分析了噪声干扰、脉冲干扰、移频干扰和距离拖引干扰对它们的干扰性能，并给出了仿真模型和仿真结果

Vishnu entered a dark fourth dimensional dream that did not support his field or continued life.

毗瑟挐进入了一个第四密度的黑暗梦想，那里并不支持他的能量场或继续生命。

Leaders and decision-making persons use it to collect the data, including the information of unit work, handing in fee, oweing fee, prepaying fee,changing and afterpaying and account transfering of joining-insurance employee, and account paying of all kinds of insurances from hospitalization insurance institutions.The collected data is picked up, organized, switched and showed to user.

该子系统主要面向各级领导、决策分析人员；从各个医疗保险经办机构和定点医疗机构采集数据，包括在各个医疗保险经办机构处理的单位办公信息，单位缴费、欠费、预缴费信息，参保职工变更信息，参保职工增减变动信息，参保职工补缴信息，参保职工帐户划拨信息：包括各定点医疗机构处理的各险种帐户支出信息，各险种的统筹金支付信息等；将采集的数据提取，组织和转换，然后展示给用户。