The method uses wavelet transform and principle component analysis to preprocess fault signal, afterward training and testing wavelet neural network with the preprocessed fault characteristic data.
该方法首先利用小波变换和主成分分析对故障信号进行预处理，然后用处理后的故障特征数据对小波神经网络进行训练和测试。
This can satisfy well time frequency analysis of multi graduation characteristic signal.
这一特点恰好满足对具有多刻度特征信号进行时频分析定位的要求。
Brief introduction and analysis of MSK signal, research its characteristic in order to demodulate efficiently.
MS K信号简介及分析，研究其特征，以便有效的对其解调。
At last Chaotic signal is applied into the analysis of system characteristic.
最后将混沌信号用于系统的特性分析中。
For showing this characteristic, this paper further calls the HHT as the Hilbert-Huang transform Local-instantaneous signal analysis (HHT-LISA).
为了体现这一特点，本文将HHT进一步称为希尔·波特-黄变换局瞬信号分析(HHT - LISA)。
Based on the analysis of the inherent characteristic of the signal, an algorithm that called the modification of the vibration parameter transform based on frequency domain integration is introduced.
在分析了振动信号固有特性的基础上，提出了一种基于频域积分的振动参量转换波形修正算法。
In this paper, A new method of system main loop analysis is quoted to analyse the behaviour characteristic of feedback amplifier with large signal, A ordinary analysis method and steps are given.
本文引用系统主回路分析的新方法—回路增益弹性法对大信号下反馈放大电路的行为特性进行讨论，并通过分析一个二阶反馈放大电路给出一般分析方法和步骤。
Based on the analysis of the characteristic of SAR signal processing algorithms, the processor adopts a kind of efficient structure, which corresponds to the algorithms that are used in the system.
在分析SAR信号处理算法特点的基础上，处理机采用了高效的与算法形式相对应的系统硬件结构。
The formerly used methods for characteristic information extraction take single-trace signal analysis as main scheme and lack strict theoretical analysis.
以往提取特征信息的方法以单道信号分析为主，缺乏严格的理论分析。
Through the experimental analysis on the synchronous signal of audio and video of the premixed gas jet flame, the characteristic of the flame is studied.
本文通过视频信号与声频信号实验分析了燃气射流火焰的声发射特征。
The characteristic of the concentration wave in the RTD of out-circular reactor, which is a nonstationary quasi-periodic signal, has been investigated with wavelet analysis.
应用小波分析研究了外循环反应器浓度波这类非平稳拟周期信号的特征。
In this paper, authors deduce a analysis scheme explaining feedback characteristic of a operation amplifier using the theory and method of signal composing and decomposing.
本文用信号分解和叠加的理论及方法，推导出一种适用于分析运算放大电路反馈特性的“分解方框图”，并通过实例介绍了相量图分析法。
The paper presents a kind of analysis of frequence- time relation according to characteristic of dopller signal and gives calculating results of a practical signal.
本文根据多卜勒信号的特点，提出一种分析频率—时间关系的方法，并给出一实际信号的计算结果。
Result Pulse signal of 20 healthy women and 20 pregnant women were examined by statistic analysis of the time-domain characteristic point zero-crossing position.
结果通过对20例健康人和20例孕妇脉象时域特征点过零点位置的统计及其变化快慢的计算，分析结果正好与实际相吻合。
Wavelet analysis, as a new technique of signal processing, possesses excellent characteristic of time-frequency localization and is suitable for analysing the time-varying or transient signals.
小波分析是一种日益获得广泛应用的信号处理新技术，它具有良好的时-频局部化特性，因而非常适于分析瞬态或时变信号。
The factors of spectrum that influence system characteristic were analyzed, it is of great importance to the establishment of analysis system of high-quality signal.
同时，分析了影响系统频谱特性的因素，对组建高性能超声数字信号分析系统很有意义。
The compressor exit total pressure is adopted as a characteristic signal to detect surges. An ar (autoregressive) model is constructed with the time series analysis method.
以压气机出口总压作为喘振检测特征信号，采用时间序列分析方法建立了AR模型。
In frequency analysis of rotating arc signal, the phase of harmonic characteristic reflects the initial Angle between weld direction and seam's direction.
在旋转电弧信号的频域分析中，其特征谐波的相位反映了焊缝方向与焊接方向的初始夹角。
In the paper the amplitude characteristic of echo signal and its conjugate signal are analysis, based on that a detection method based on conjugated FRFT in sea clutter is proposed.
文中分析了回波信号以及其共轭信号的FRFT幅值特性，并利用此特性提出了一种基于共轭FRFT模函数对消的海面运动目标检测方法。
The fundamental principle of direct digital synthesis (DDS) is introduced in this paper. Based on signal analysis, the ideal output spectrum characteristic of DDS is analyzed briefly.
对DDS基本原理进行了简要介绍，利用信号分析的方法对DDS理想输出进行频谱分析。
Wavelet packet analysis to extract vibration signal characteristic frequency, Use serial programming examples matlab GUI implementation, Since writing the curvature calculation function.
小波包分析提取振动信号中的特征频率，利用matlabGUI实现的串口编程例子，自写曲率计算函数。
Based on analysis of spectral characteristic of helicopter acoustic signal, a method of extracting harmonic frequencies from the helicopter acoustic signal via ESPRIT is proposed.
在对直升机声信号特征进行分析之后，提出了一种基于谐波恢复的ESPRIT方法来提取直升机声信号谐波频率作为特征用以识别直升机声目标。
For getting accurate intrinsic characteristic message of physiology activity of patient in time, ECG signal analysis and processing becomes an important problem facing medicinal researchers.
对心电信号进行分析处理，以及时准确获取病人生理活动可靠的内部特征信息，是生物医学研究者所面临的重要问题。
The effectiveness for the amplitude of signal being used as the characteristic parameter has been proved by a theoretical analysis approach.
在此基础上进一步从理论上证明了信号幅值作为损伤特征参量的有效性。
The effectiveness for the amplitude of signal being used as the characteristic parameter has been proved by a theoretical analysis approach.
在此基础上进一步从理论上证明了信号幅值作为损伤特征参量的有效性。
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