谱密度

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

FFT分析器作谱密度估计时的偏度误差分析

Analysis of bias errors in spectral density estimates using FFT analyzers

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 ) .

PDA信号的互谱密度处理及性能分析

Cross - spectral Density Processing and Performance Analysis of PDA Signals

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 ) .

功率谱密度（PSD）在评价超精密光学表面中的应用研究

Application of Power Spectral Density to Specify Optical Super-precision Surface

UWB信号波形及功率谱密度的分析

Pulse Shape of UWB Signals and PSD Analysis

PAL电视信号的2&D相关系数和功率谱密度

The 2-D Correlation Coefficients and Power Spectrum Density ot fhe PAL TV Signals

对C级公路路面进行数值模拟，模拟结果表明：利用该方法所得路面不平度的功率谱密度与给定的功率谱密度是准确一致的。

The simulation and analysis were done on the C grade road . The results indicate that the power spectrum density of road roughness obtained is the same as given .

ARMA过程有理谱密度特征的另一证明

Another Prove for the Spectral Properties about ARMA Processes

本文推导了有限频域[fa，fb]中的噪声引起的修正的Allan方差公式，为噪声的谱密度变换成Allan方差提供了准确的公式。

It provides a lot of accurate formulae for spectral density transforming into Allan variance .

由此降低了功率谱密度，提高了频带使用效率和便于多址应用。通过对每个相干载波信号CI扩频且合成，其效果很好。

The power spectrum density is decreased , the frequency usage efficiency is improved and the multi-access application is allowed .

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 .

分析重尾ON/OFF源功率谱密度的TAM近似法

TAM method of analyzing power spectrum density of heavy-tailed ON / OFF Source

提出了基于小波函数的两个正交脉冲，其功率谱密度满足美国通信委员会（FCC）对UWB系统的频谱限制。

Two orthogonal pulses based on wavelet were presented , their spectrum meet FCC spectral mask for ultra wideband ( UWB ) system .

通过仿真观察到调制与解调信号的波形，星座图以及QAM信号功率谱密度曲线，并对仿真结果进行了分析。

The modulating wave . Constellation Diagram and power spectrum density curve is observed by simulation .

功率谱密度函数是两个Voigt函数之和。

The power spectral density is composed of two Voigt function .

动校正采用的叠加速度谱密度为100m×100m，空间速度场进行了平滑；

The density of velocity spectrum adopted by NMO is 1000 m × 1000m , the spatial velocity field is smoothed ;

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 .

功率谱密度值与时域指标体温反应指数（TRI）有极好的相关性。

A high degree of relationship was found between the power spectral density and thermal response index ( TRI ) .

对实测高精度火箭橇试验轨道随机不平顺功率谱密度（PSD）进行B样条插值，得到拟合用PSD平均曲线。

Stochastic irregularity power spectrum density ( PSD ) data surveyed from high accuracy rocket sled test track is interpolated with B-spline to gain PSD average curves for curve fitting .

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 ) .

首先计算实际航迹信号的功率谱密度，得到航迹的频谱范围，依据Shannon定理初步确定激光重频值。

In analyzing flight path data , power spectral density is computed to obtain the frequency range and times of LFR using the Shannon theorem .

方法从湍流理论的基本方程出发，在一定假设条件下，根据Taylor关于湍流的冻结假定，从湍流基本方程的傅氏变换解可以导出脉动风压谱密度函数的计算公式，并考虑了全部的剪切项。

The spectral density function of wind load fluctuation could be derived from the CFD wind average velocity and fluctuating velocity distribution according to Taylor 's Frozen Assumption of turbulence .

以镜架支撑安装基面上实测的地面振动速度功率谱密度为激励，运用ANSYS有限元分析软件的PSD分析模块，对该结构系统的随机振动响应进行了分析计算。

The PSD measured on the install base level of the mount as the excitation , the random vibration response of the mount was analyzed with the PSD module of ANSYS .

根据半功率谱密度与频响函数之间的相似数学表达式，因此将EMA方法用于环境激励下的模态参数识别。

According to the same expression between positive power spectral density and FRF , EMA algorithms can be applicable for ambient excitation .

均匀功率谱密度约束下的OFDM-UWB比特分配算法

Bit allocation algorithm for OFDM-UWB with constraints of uniform power spectrum density

主要集中在X射线资料的时间和光谱分析的最重要的方面，包括功率谱密度，结构函数，带间时间延迟，同步峰值能量的漂移和谱演化。

The most important aspects emerged from the temporal and spectral analysis of the X-ray data , including power spectral density , structure function , inter-band time lags , shifts of synchrotron peak energies , and spectral evolution are focused .