1) odd-order cumulant
奇数阶累积量
1.
For extracting higher order frequency coupling feature radiated by actual nonlinear vibration system via odd-order cumulants(OOC),quartic frequency coupling and quadratic-to-cubic frequency coupling were firstly defined,OOC features analyzed,the relation between OOC calculation method and its computational load was studied.
为了用奇数阶累积量提取非线性振动系统的高次频率耦合特征,定义了四次频率耦合、二三对频率耦合等高次耦合新概念,分析了奇数阶累积量特征,研究了奇数阶累积量计算方法与计算量间的关系,提出了奇数阶累积量计算优化算法,该算法将奇数阶累积量的直接估计变为递推估计,将奇数阶累积量的多维运算转化为一维运算,大幅度减小了计算量,在工程上具有可实现性。
2) three-order cumulant
三阶累积量
1.
For the purpose of identifying harmonic components in vibration signals with strong Gaussian colored noise,by using an estimation algorithm of time averaged three-order cumulant,a method of harmonic retrieval from the(vibration) signals is presented in the paper.
为了识别在强高斯噪声背景下振动信号的谐波成分,从三阶累积量的估计算法出发,提出了基于时间平均的三阶累积量算法,进行振动信号的谐波恢复。
2.
After the analysis for speech signal with of three-order cumulant spectrum,this algorithm through using subharmonic-harmonic rate method can compute harmonic parameters and high-low frequency energy ratio.
该方法在分析了语音的三阶累积量谱后,用子谐波-谐波方法取得基音,并计算出谐波参数和高低频能量比值。
3) higher order cumulants
高阶累积量
1.
By Hinich s test,the nongaussian and nonlinear components of ship radiated noise was detected, and the objective evidences were given for using higher order cumulants to extract noise features.
用Hinich检验方法 ,验证了实际舰船辐射噪声中存在非高斯性、非线性成分 ,为利用高阶累积量方法提取舰船辐射噪声的非高斯特征 ,提供了客观依据。
2.
Blind separation of sources based on higher order cumulants is applied to the separation between vibration signal and noise,which is important to diagnosi.
本文利用基于高阶累积量的盲信号分离方法 ,设计了相应算法 ,成功地从被噪声污染的信号中恢复源振动信号 ,从而可确保碰摩故障的检测和诊断能顺利进
3.
The identification of such a system is discussed when applying higher order cumulants.
研究了利用高阶累积量方法对复共轭四阶系统进行辨识的问题 ,分析讨论了这种四阶系统的特点 ,给出了由连续系统到离散系统的转换公式 ,并利用基于累积量表示的修正尤勒 沃克方程对该四阶系统进行了辨识 。
4) high-order cumulant
高阶累积量
1.
Estimation of time delay by using weighted high-order cumulant on correlated noise;
相关噪声背景下加权高阶累积量的时延估计方法
2.
Research on DOA Estimation Based on High-Order Cumulant;
基于高阶累积量的DOA估计法研究
3.
Seismic wavelet estimation using high-order cumulant matching method and hybrid ant colony algorithm.
基于高阶累积量拟合及混合蚁群算法的地震子波估计
5) higher-order cumulants
高阶累积量
1.
Lung sound feature extraction based on parametric bispectrum analysis of higher-order cumulants;
基于高阶累积量的参数化双谱分析的肺音特征提取
2.
The ARMA model parameters of lung-thorax system from lung sound were estimated by the higher-order cumulants.
应用高阶累积量方法 ,从肺音信号辨识肺胸系统的ARMA模型参数 。
3.
To investigate the modulation recognition of Phase Shift Keying (PSK) signals widely used in satellite Communication, such as pi/4-QPSK and 8-PSK , an algorithm for modulation recognition based on higher-order cumulants of signal difference is proposed.
针对卫星通信中常用的数字调相信号pi/4-QPSK、8PSK的调制识别问题,提出了一种基于信号差分高阶累积量的识别算法,该算法利用信号差分的四阶和八阶累积量特征对pi/4-QPSK、8PSK信号进行识别。
6) Fourth order cumulant
四阶累积量
1.
Analysis and application of fourth order cumulant MUSIC algorithm;
对四阶累积量MUSIC算法的分析与应用
2.
Based on time delay and the fourth order cumulant and MUSIC algorithm, a novel approach of estimating multiple spatial signal frequencies and 2 D directions of arrival with spatio temporal sub Nyquist sampling is proposed in this paper.
在空间信号时 -空欠采样下 ,基于时延、四阶累积量和MUSIC算法提出了一种新的多空间信号频率和 2 D到达方向分离估计方法。
3.
Using the elaborately defined fourth order cumulants,two methods of harmonic retrieval in coloured non Gaussian noise are proposed.
本文利用特殊定义的四阶累积量，给出两种非高斯有色噪声中的谐波恢复方法，克服了原有方法的局限性。
补充资料：累积增长量
累积增长量
【泉积增长t】以某一固定时期作为基期，报告期水平减去某一固定时期水平(通常为最初水平)的差额。它说明一段时期内总的增长(减少)量。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条