功率谱

通过数值模拟，实现有关自由度的能量耗散过程，采用功率谱方法研究有关系统运动中的坐标q（t）或动量p（t）的演化过程。

The energy dissipation in the relevant system is realized by numerical simulation .

这些结果与Fourier意义下的功率谱密度估计有很大的不同。

These results are much different from that of Fourier 's.

混沌PWM逆变器输出电压功率谱密度分析

Analysis of Power Spectral Density of the Output Voltage in Chaotic PWM Inverter

将数字声波信号导入MATLAB软件进行处理，得到其功率谱密度图。

Then they were imported to MATLAB and calculated to obtain the power spectral density ( PSD ) .

基于小波包联合AR功率谱理论的滚动轴承故障诊断

Fault diagnosis of rolling bearing based on wavelet packet combined autoregressive power spectrum theory

然后采用功率谱K值法进行单自由度动作识别，得到了较好的识别效果。

Then recognize action pattern by the method of power spectrum K value , and the recognize effect is good .

基于功率谱分析和RBF网络的表面EMG多模式分类

Based on Power Spectrum and RBF Neural Network to Classify Surface Electromyography

其工作原理为：首先它通过FFT运算计算出相邻两帧图像的功率谱；

Firstly two frames of images are transformed to their power spectrums with FFT .

FFT功率谱幅度和频率泄漏修正的实用方法

A practical approach to leakage correction of frequency and amplitude in FFT power spectrum

根据AR模型系数计算功率谱密度（PSD）。

AR model coefficients calculated according to the power spectral density ( PSD ) .

行星际闪烁功率谱的Fresnel现象与太阳风速度

The Fresnel structure in interplanetary scintillation power spectrum and solar-wind velocity

基于小波功率谱估计的空间目标RCS特性分析

Analysis of Characterstics of Space Target RCS Based on Wavelet Power Spectrum Estimation

本文根据战场目标声信号的低信噪比及短时平稳性特点，分析了常用的目标声信号特征提取方法和功率谱估计发展现状，提出利用AR模型谱估计提取目标声信号的特征。

AR model power spectral estimation has been used to extract the feature of objective acoustic signal .

基于功率谱的表面EMG信号运动模式识别

Based on the Power-spectrum to Classify the Pattern of the Surface Electromyography

这种方法以接收信号的功率谱密度函数为时间序列，利用最小二乘格型自适应滤波器经由AR建模而得到高分辨率的时间延迟估计。

This method uses the eross power spectral density ( PSD ) function of two received signals as a time sequence .

伪码QPSK调制的功率谱分析和实验研究

Power spectrum analysis and experimental research of PN code modulated QPSK waves

在时空混沌的定量刻划中，主要介绍的两种普遍的方法，Lyapunov指数法和功率谱分析法。

Two methods are briefly introduced in the quantitatively characterize of the spatiotemporal chaos : Lyapunov exponents and power spectral analysis .

Welch功率谱估计算法仿真及分析

Study and Simulation of Welch Power Spectrum Estimation Method

Welch功率谱估计方法的参数选择

Parameters Determination in Welch Estimation of Power Spectrum

用H－S波前探测器得到校正前后波前相位时间功率谱，分析了自适应光学控制系统对大气湍流扰动波前的时域校正效果。

Using data which were measured from H S wavefront sensor of an AO system , power spectra density ( PSD ) was calculated and compared between open loop and close loop conditions .

新生儿心动周期信号（HPS）的混沌特征、功率谱分析

Analysis for chaos characteristics and power spectrum of heart period signal ( hps ) on neonatal

通过对仿真出来的信号进行功率谱分析与DEMON谱分析，该仿真能较好地体现舰船辐射噪声的基本声学特征。

The Simula lion can reflect typical acoustic characteristics of ship-radiated noise by processing and analyzing the simulated signal .

可以实现对数据的统计分析、滤波、FFT变换、功率谱分析、相关分析等。

The functions of statistic analysis , data filtering , FFT transition , power spectrum analysis , correlation analysis and etc are realized in the software .

在本文中的数字化解调是基于DSP系统，并利用功率谱估计的理论对MSK已调信号进行功率谱的估计来实现的。

The digital MSK demodulation based on the DSP system employed the theory of power spectral analysis to demodulate the digital MSK modulated signal .

同时，本文对采集的数据分别进行过零点数和基于AR参数模型的功率谱估计，在时域和频域上进行特征提取。

Meanwhile , the number of zeros was conducted and the AR parameter model based on power spectrum estimation in the time domain and frequency domain feature extraction .

本文在已知VonKarman功率谱密度函数的情况下，选择利用自回归滑动平均（ARMA）模型来仿真风速。

This paper uses Auto-regressive moving-average ( ARMA ) model to simulate the wind records based on Von Karman spectral .

本文根据SEMG的频谱特性提出了一种新的特征提取方法&功率谱比值法。

Based on the spectrum characteristic of SEMG , a new feature extraction method called Power Spectrum Ratio Method was proposed .

通过MATLAB仿真编程软件实现了盲源分离过程，利用相似系数和分离前、后功率谱密度之间的对比验证了算法的可行性。

Through MATLAB simulation program software to achieve the blind source separation process , use the similarity coefficients and power spectral density separation before and after the comparison , that proved the feasibility of the algorithm .

提出应用ARMA，Allan方差分析法及功率谱密度PSD（Powerspectrumdensity）分析法联合对光纤陀螺FOG（FiberOpticGyroscope）的误差特性及建模技术进行了研究。

Methods of PSD ( power spectrum density ), ARMA , and Allan variance were federally used to study of the error speciality and modeling technology of the FOG ( fiber optic gyroscope ) .

码速率估计算法主要研究了针对QPSK信号估计算法，利用延时乘积功率谱特征对码速率进行估计。

For symbol rate estimation , power spectral characteristic of delay product is used to estimate the symbol rate of QPSK signal .