时频功率谱表示,time frequency representation of power
1)time frequency representation of power时频功率谱表示
2)time frequency representations of power (TFRs)时频功率谱表示(TFRs)
3)time-frequency power spectrum时频功率谱
4)frequency-power spectrum频-功率谱
5)power spectra功率频谱
1.Starting from the extended coupled nonlinear Schrdinger equations including quintic nonlinearity,the expressions for the nonlinear phase shifts and frequency chirps of different pulse pairs were derived,and the phase shifts,chirps andpower spectra of pulse pairs with different shapes were simulated,compared and analyzed.计算并比较了它们的相移、啁啾和功率频谱。
2.Thepower spectra of optical pulses are numerically simulated as well.数值模拟了光脉冲传输的功率频谱。
英文短句/例句
1.Application of Power Spectrum Analysis in Diagnosis of Motor Fault功率频谱分析在电机故障诊断中的应用
2.Spectrum Sensing Optimization Based on Detection and Power Constraints基于检测和功率受限的频谱感知优化
3.A Real Time Power Spectrum Analysis of Low Frequecy Radom Signal;低频随机信号实时功率谱分析仪的设计与实现
4.Spectrum of Numerical Analysis from High-power Microwave Air Breakdown高功率微波大气击穿条件下的频谱数值分析
5.A Scheme for Power Control Based on Multi-user Collaborative Spectrum Sensing一种多用户协同频谱感知功率控制方案
6.Frequency Power Partition Scheme in the Broadband Multi-cell Cellular Networks宽带多小区蜂窝网络中频谱功率分割机制
7.Frequency spectrum element, carrier frequency. Frequency type can be specified.频谱元件，载波频率。可指定频率类型。
8.Min-Max Fair Power and Rate Control Algorithm for Dynamic Spectrum Access动态频谱访问中的最小最大公平功率与数据率联合控制算法
9.full power response最大功率输出频率特性
10.Road irregularity, as a stationary stochastic process, is generally illustrated by power spectral density (PSD) in frequency domain.道路随机过程通用的描述方法为频域的功率谱密度函数方法。
11.The anticonvulsant action of ketamine onδ-band of quantitative pharmaco-EEG in rabbits氯胺酮抗惊厥作用对脑电图δ频段功率谱的影响
12.double frequency spectral density functio双重频率谱密度函数
13.high resolution low frequency spectrum analyzer高分辨率低频谱分析仪
14.high resolution LF frequency spectrum analyzer高分辨率低频频谱分析仪
15.The Research of Freqency Assignment in Frequency Spectrum Management System;电磁频谱管理中的频率分配技术研究
16.The numerical results demonstrate that the larger the zone of timing jitter and the higher the frequency, the less proportion the discrete PSD component is in the total PSD.数值计算结果表明，随时间抖动范围增大和频率提高，离散功率谱分量所占比例下降。
17.very high frequency power signal generator甚高频功率信号发生器
18.ultra high frequency power signal generator超高频功率信号发生器
相关短句/例句
time frequency representations of power (TFRs)时频功率谱表示(TFRs)
3)time-frequency power spectrum时频功率谱
4)frequency-power spectrum频-功率谱
5)power spectra功率频谱
1.Starting from the extended coupled nonlinear Schrdinger equations including quintic nonlinearity,the expressions for the nonlinear phase shifts and frequency chirps of different pulse pairs were derived,and the phase shifts,chirps andpower spectra of pulse pairs with different shapes were simulated,compared and analyzed.计算并比较了它们的相移、啁啾和功率频谱。
2.Thepower spectra of optical pulses are numerically simulated as well.数值模拟了光脉冲传输的功率频谱。
6)power spectrum功率频谱
1.4) At the matching point of the inlet and engine,thepower spectrum of the flow at the exit is like white noise and not sensitive to the variation of attitude angle and free stream Mach number.对一种弹用S弯进气道进行了试验,结果表明:①偏航角一定,攻角由负到正变化时,总压恢复系数先上升后变化不大,|DC60|则先下降后小幅升高;②攻角一定,总压恢复系数和|DC60|随偏航角的增加均呈先升高后降低的趋势;③大的攻角和偏航角组合状态下,总压恢复系数较低,|DC60|偏大,但随偏航角进一步增大,进气道性能有所改善;④进/发匹配点处,进气道出口压力功率频谱较平坦且对姿态角和来流马赫数的变化均不敏感;⑤发动机小流量状态时,进气道模型发生了喘振,频率约为150 Hz。
延伸阅读
功率谱密度估计随机信号的功率谱密度用来描述信号的能量特征随频率的变化关系。功率谱密度简称为功率谱，是自相关函数的傅里叶变换。对功率谱密度的估计又称功率谱估计。平稳随机信号x(t)的（自）功率谱Sxx(ω)定义为(1)式中rxx(τ)为平稳随机信号的自相关函数。对于离散情况，功率谱表示为(2)式中T为离散随机信号的抽样间隔时间。当利用随机信号的 N个抽样值来计算其自相关估值时，即可得到功率谱估计为 (3)可见，随机信号的功率谱与自相关函数互为傅里叶变换的关系，这两个函数分别从频率域和时间域来表征随机信号的基本特征。按上式计算功率谱估值，其运算量往往很大，通常采用快速傅里叶变换算法，以减少运算次数。计算信号功率谱的方法可以分为两类：一为线性估计方法，有自相关估计、自协方差法及周期图法等。另一类为非线性估计方法，有最大似然法、最大熵法等。线性估计方法是有偏的谱估计方法，谱分辨率随数据长度的增加而提高。非线性估计方法大多是无偏的谱估计方法，可以获得高的谱分辨率。参考书目何振亚：《数字信号处理的理论与应用》，人民邮电出版社，北京，1983。A. V. Oppenheim, R. W. Schafer, Digital Signal Processing Prentice-Hall, Inc., Englewood Cliffs,New Jersey,1975.
