1) Huang transform
Huang变换
1.
Prediction of time series based on Huang transform and BP neural network;
基于Huang变换和BP神经网络的时间序列预测方法
2.
In order to solve the shift of velocity and displacement obtained by integrating acceleration,the Huang transform is used to obtain the intrinsic mode functions of acceleration.
根据非平稳输入下建立的功率谱与均值反应谱之间的关系,合成基于水工设计反应谱的人工地震波,并对其幅值进行修正,降低了高频区误差作用;为了解决加速度时程积分后的速度、位移时程的零线漂移现象,利用Huang变换得到加速度时程的固有模态函数,由Huang变换方法得到的最低频率固有模态函数分量通常情况下代表原始信号的趋势或均值,对去掉均值后的加速度时程进行积分得到的速度、位移时程不存在零线漂移问题。
3.
A new time-series method,namely Huang transform can pick up the mean value or trend of signals.
一种新的信号处理方法Huang变换能够提取信号的均值或趋势,而对地震加速度记录进行二次积分得到较长时间内的位移时程会“飘离”零线,据此通过Huang变换后固有模态函数分量信息重构推导Huang变换在地震波信号纠偏中的原理。
2) Hilbert-Huang transform(HHT)
Hilbert-Huang变换
1.
This paper examined the rationale of Hilbert-Huang transform(HHT) for structural health monitoring by using experimental data from shaking table testing of a full-size two-story wooden house conducted at the Disaster Prevention Research Institute(DPRI),Kyoto University,Japan.
通过一个足尺的2层木结构房屋振动台试验,对Hilbert-Huang变换(HHT)在结构损伤诊断中的应用进行了研究与分析。
2.
A new method for nonlinear and non-stationary data processing,the Hilbert-Huang transform(HHT),is applied to analyze a typical nonlinear system,Duffing equation.
介绍了Hilbert-Huang变换(HHT)这一全新的处理非线性、非平稳信号数据的方法,将其用于分析典型的非线性系统-Duffing方程,通过对使用三阶Runge-Kutta法求解而得到的Duffing方程数值解分解后,得到了4个固有模态函数分量和1个残余量,给出了相应的能量-频率-时间分布图-Hilbert谱,并将其边际谱与Fourier谱作了比较。
3.
The signal prodigality analysis method based on Hilbert-Huang Transform(HHT) is put forward,and through the influence of the signal nonlinear on the main frequency distribution,we find out the approximated relationship between the prodigality and the main frequency of the near periodical signal which is rich in high frequencies.
提出了一种基于Hilbert-Huang变换(Hilbert-Huang Transform,HHT)的信号周期性分析方法,通过分析信号的非线性对主频分布的影响,找到了具有丰富高频含量的近似周期信号的主频与其周期性的近似对应关系。
3) Hilbert-Huang transform
Hilbert-Huang变换
1.
Using Hilbert-Huang transform to pick up instantaneous parameters of seismic signal;
利用Hilbert-Huang变换提取地震信号瞬时参数
2.
Denoise of Medical Ultrasonic Signal Based on Hilbert-Huang Transform;
基于Hilbert-Huang变换的医学超声信号去噪
3.
Fault diagnosis of diesel engine valve leakage based on hilbert-huang transform;
基于Hilbert-Huang变换的柴油机气门漏气故障诊断研究
4) HHT
Hilbert-Huang变换
1.
EVALUATION OF ENERGY AND SEISMIC EFFECT OF EARTHQUAKE WAVE BASED ON HHT ANALYSIS;
基于Hilbert-Huang变换分析的地震动能量与震动效应评估
2.
In this paper, a new method using the Hilbert-Huang Transform(HHT) was used to decompose S1 into a series of time-frequency atoms.
本文用一种全新的时频分析方法:Hilbert-Huang变换(HHT),对30例心音数据进行心音分析实验。
3.
A speaker emotion identification method based on Hilbert-Huang Transform(HHT)is proposed in this paper,six basic human emotions are investigated.
文章提出了一种基于Hilbert-Huang变换的汉语语音情感分类方法,研究了六种最基本的人类情感。
5) Hilbert-Huang transformation
Hilbert-Huang变换
1.
Fault diagnosis to mine hoist based on wavelet analysis and Hilbert-Huang transformation
基于小波分析与Hilbert-Huang变换的矿井提升机故障诊断
2.
Local and all-circumferential rubbing fault occurrences of rotors were simulated on a rotor test rig and the time-frequency characteristics of the fault-signals,issued under different conditions,obtained by Hilbert-Huang transformation(HHT).
通过转子实验台模拟了转子局部碰摩、全周碰摩故障,基于Hilbert-Huang变换(HHT)给出了不同条件下碰摩故障振动信号时频分布特征。
3.
According to the specific features of fault-vibration signals of a centrifugal pump,presented is a new method for fault diagnosis of vibration signals of a centrifugal pump by employing a combination of Hilbert-Huang transformation(HHT) and a radial basis function(RBF) neural network.
根据离心泵故障振动信号的特点,提出了一种Hilbert-Huang变换(HHT)和径向基(RBF)神经网络相结合的离心泵振动信号故障诊断新方法。
6) Hilbert-Huang transform (HHT)
Hilbert-Huang变换
1.
Hilbert-Huang transform (HHT) and direct method are applied to estimate the instantaneous frequencies of the multi-component AM-FM image respectively.
将一维经验模式分解(EMD)方法和Hilbert-Huang变换(HHT)直接应用于二维图像处理中,提出了一种新的二维EMD算法,将提取出图像的多尺度空间频率信息分别用HHT和直接法来估计多分量图像AM-FM形式的瞬时频率。
2.
This paper summarized the development and the current situation of the structual damage detection, put emphasis on the application review of Hilbert-Huang Transform (HHT) in damage detection.
本文总结了结构损伤检测的研究现状和发展趋势,重点回顾了Hilbert-Huang变换在损伤检测中的应用,在已有研究成果的基础上,针对结构损伤检测的要求,充分利用了Hilbert-Huang变换方法自适应性的特点和时频分析的能力,把这种新兴的信号处理方法由时域向空间域,一维向二维拓展,应用于结构损伤检测。
补充资料：Radon变换和逆Radon变换
Radon变换和逆Radon变换
X线物理学术语。CT重建图像成像的主要理论依据之一。1917年澳大利亚数学家Radon首先论证了通过物体某一平面的投影重建物体该平面两维空间分布的公式。他的公式要求获得沿该平面所有可能的直线的全部投影(无限集合)。所获得的投影集称为Radon变换。由Radon变换进行重建图像的操作则称为逆Radon变换。Radon变换和逆Radon变换对CT成像的意义在于，它从数学原理上证实了通过物体某一断层层面“沿直线衰减分布的投影”重建该层面单位体积，即体素的线性衰减系数两维空间分布的可能性。
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