Time-frequency distribution(TFD) of multi-component signal can produce cross-components, TFD with fixed kernels perform well only for limited signals.
多分量信号的时频分布会产生交叉项，采用固定核函数的时频分布，其适用的信号形式有很大的局限性。
The authors propose a new method with combination of time domain and frequency domain by using the time-frequency distribution image of the radar signal.
借助于雷达信号的时频分布图像，提出了一种在时频联合域上进行信号识别的新算法。
We illustrate the wavelet package analysis that can obtain the time-frequency distribution figure of noise signal, which can be used to define gray-image.
首先对噪声信号进行小波包分解，得到含有待诊断柴油机主轴承间隙故障信息的噪声信号时频分布图，并由此定义图像。
One is a time-frequency distribution based EMD, the other is nonlinear energy operator (NEO) based on EMD, and both of them have good results in epileptic EEG signal processing.
一个是基于EMD的时频分布，另一个是基于EMD的非线性能量算子（NEO）方法，其在癫痫脑电信号的处理中都取得了比较好的效果。
Time-frequency distribution series based on wavelet transform is discussed., and a new time-frequency tool: frequency-shear distribution is introduced into radar imaging fields.
讨论了基于小波变换的时频分布级数，把一种新的时频分析工具——频率-切变分布应用于时频成像。
An improved algorithm for calculating the signal-dependent adaptive kernel time-frequency distribution is put forward based on the radially-Gaussian signal dependent representation.
通过对基于信号特征的径向高斯核时频分布进行改进，提出了一种基于信号特征的自适应核时频分布的改进算法。
Generalized into local frequency from integral frequency, the method of joint time-frequency distribution effectively analyzes the signal based on the variation of frequency with time.
联合时频分布方法把整体频谱推广到局部频率，根据频率随着时间的变化情况，对信号进行有效的分析。
Stratigraphic absorption compensation based on short-time Fourier transform has been developed by analysing the time-frequency distribution characteristics of seismic reflection signals.
本文在分析地震反射波勘探信号时频分布特性的基础上提出了基于短时傅里叶变换的地层吸收补偿方法。
After signal local wave decomposition, the information entropy according to time-frequency distribution was established, and it was used as characteristic parameter for fault recognition.
对信号进行局域波分解后，建立基于时频分布的信息熵，以此作为故障识别的参数。
The conception of transient frequency and calculation method of wavelet packet are introduced, and time frequency distribution about simulation and actual seismic signals is given.
介绍了瞬时频率的概念和瞬态谱的小波包计算方法，并结合时间域模拟信号给出了其时频分布。
Based on it, we doa deep research on the space distribution and time distribution from the view of term frequency, mutual information and word similarity.
在此基础上，我们进行了新词特征的挖掘，从串频、互信息和相似度等角度主要对新词的空间分布规律和时间分布规律进行了分析。
Empirical evidences show that the distributions of high frequency time series are "fat tail" type distribution rather than normal distribution with "light tail" as those in traditional modeling.
经验表明高频时间序列的分布常是“肥尾”型的，而非传统建模中的“薄尾”型的正态分布。
Blind source separation (BSS) based on spatial time frequency distribution can separate signals with different time frequency distributions.
基于空间时频分布的盲源分离算法可以用来分离具有不同时频分布的信号。
The statistical model of frequency and intensity of anomalous microtherm events in Nanjing is established by means of the extreme value distribution theory of stationary time series.
本文借助于平稳时间序列的极值分布理论，对南京地区异常低温事件频次和强度建立统计模型。
The specific noise distribution in the time-frequency rate distribution (TFRD) is analyzed.
分析了时间-调频斜率分布的噪声分布特性；
A comparison of the two displaying methods of cooling-load rate distribution, that is, time frequency chart and probability distribution curve, is made.
对时间频数图、概率分布图这两种负荷率分布的表示方法进行了比较。
This paper introduces the method of analyzing TEOAEs by short time Fourier transform and gives the experiment results of time frequency distribution, then we analyze each frequency component.
本文介绍了用短时傅立叶变换分析瞬态诱发耳声发射方法，并给出了其时频分布的实验结果，分析了其各个频率成份出现的不同时刻及持续时间。
This change in the evolution of the name frequency distribution early in the nineteenth century may indicate a more general change in the information economy about that time.
在十九世纪内初期的名字度数分析的这个方面的改变进化可以指出更多的关于那次的数据经济方面的一般改变。
So the influence of high-frequency noise is analyzed by the analysis of power spectra, coherent structure, probability distribution of time series and differences of them.
针对这些现象，从谱、相干结构、时间序列本身的概率分布和标量差的概率分布，分析了高频噪声的影响。
The hybrid time-frequency method was modified to analyze the simultaneous switching noise in power distribution network.
对时频域混合方法加以改进用于分析电源分配网络同步开关噪声。
The time harmonic voltage and current wave propagation along a transmission line can readily be transferred from frequency domain voltage and current phasor distribution along the line.
由传输线上电压及电流沿线分布之频域相量，可转换为传输线上各频率成份弦波电压及电流沿线之时域传播。
This paper investigates energy distribution of air-borne acoustic signals in time-frequency domain during aluminum alloys spot welding in order to identify weld nugget states.
研究了铝合金点焊过程中声音信号的时频域能量分布，并应用它来识别点焊的熔核状态。
We drew the conclusion that the frequency distribution of the non-thermal radiation from a general spherically-symmetric and charged evaporating black hole depended on the time.
研究一般球对称带电蒸发黑洞视界附近粒子的能级交错，给出交错能级最大值的表达式，得出一般球对称带电蒸发黑洞非热辐射频率范围是随时间变化的结论。
A novel fault identification algorithm based on smooth pseudo Wigner-Ville distribution (WVD) is proposed, which focused on the time-frequency analysis of network traffic.
通过研究网络流量的时频分析，提出了一种新的基于平滑魏格纳分布(WVD)的故障识别算法。
The time-frequency joint distribution of a target reflects well its physical structural property so it can be used as an effective means of radar target recognition.
目标的时间-频率联合分布能够很好地反映目标物理结构特征，可以作为雷达目标识别的一个有效手段。
It reduces the "music noise" using the human auditory characteristics, and enhances the hearing quality using the speech spectrum distribution characteristics in the time-frequency dimension.
主要以谱减法为基础，结合人耳的听觉特性从而减少残留“音乐噪声”的影响；结合语音的语谱在时-频域分布特性从而提高增强后语音的听觉质量。
Using time-frequency energy distribution we can analyze, process any signal and abstract information in given time or frequency.
利用时频分布，可以对各种信号进行分析、处理，提取信号在特定时间特定频率所具有的特征信息。
Using time-frequency energy distribution we can analyze, process any signal and abstract information in given time or frequency.
利用时频分布，可以对各种信号进行分析、处理，提取信号在特定时间特定频率所具有的特征信息。
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