Firstly the estimation of instantaneous frequency is discussed.
首先是瞬时频率的估计问题。
The local energy and instantaneous frequency of the signal can be derived from the IMFs.
信号的局部能量和瞬时频率都可以从其本征模函数中推导出来。
Instantaneous frequency measurement (DIFM) receiver is one of important component part of EW system.
瞬时测频接收机是电子战系统的重要组成部分之一。
A method for identifying the instantaneous frequency of a linear time-varying structure was proposed.
提出了一种识别线性时变结构瞬时频率的方法。
Instantaneous Frequency Measurement (IFM) receivers are important for modern electronic reconnaissance systems.
瞬时测频接收机是现代电子侦察系统的重要组成部分。
All the conventional vibrators use the sweep signal of which the instantaneous frequency shows linear change with time.
常规可控震源都是采用瞬时频率随时间线性变化的扫描信号。
Introduction to the physical concept, classical definition and application scope of instantaneous frequency (IF) is given.
首先介绍了瞬时频率的物理概念、经典定义及其适用范围。
Experimental simulation yielded the relation of the partial mode's instantaneous frequency and vortex frequency without noise.
实验模拟，得到无噪音的部分模式的瞬时频率的关系和涡流频率。
It has the properties of high time-frequency resolution and energy concentration as well as tracking instantaneous frequency etc.
它具有很高的时频分辨率、能量集中性和跟踪瞬时频率等特性。
This paper proposed the theory of digital counting instantaneous frequency measurement and analyzed the error of frequency measurement.
文章介绍了一种用直接数字计数测量瞬时频率的原理，并进行了测频误差分析。
In the paper, the method to estimate instantaneous frequency of AM-FM signals using the peak of the WVD and its performances are studied.
该文研究了应用WVD谱峰检测估计AM - FM信号的瞬时频率的方法及其性能。
The design of an X band broadband microwave correlator used in digital instantaneous frequency measurement (DIFM) is introduced in the paper.
本文介绍了应用于数字瞬时测频接收机(DIFM)中的X波段宽带微波相关器的设计。
The method of TLS-ESPRIT combining the mathematical statistics is presented for obtaining the multi-component signal instantaneous frequency (IF).
首次提出利用TLS -拓广esprit结合数理统计方法求解多分量信号平均频率。
The physical meaning of instantaneous frequency is analyzed. Its application in the evaluation of the bandwidth of IR scanning systems is discussed.
分析了瞬时频率的物理概念，指出在红外扫描系统中，用瞬时频率来计算系统带宽是值得讨论的。
Its adaptability and good local performance of signal instantaneous frequency and amplitude, thus make the signal expressed as a real physical form.
它的自适应性和局域性能很好的表征信号的瞬时频率和幅度，从而将信号表示成具有实际物理意义的形式。
It stems from the concept of instantaneous frequency, and it can describe accurately the local properties of dynamic data in the time-frequency plane.
该方法源于瞬时频率的概念，它能把动态信号的局部特征正确地在时频域内予以描述。
The doppler signal that is mixed and exported by microwave interferometer is a non-stationary signal, its instantaneous frequency is changing time variant.
微波干涉仪混频输出的多普勒信号是一个非平稳信号，其瞬时频率随着时间的变化而变化。
Supposing the LFM signals had been sorted and selecting the instantaneous frequency as identification character, the closest method is used to distinguish the signals.
在对LF M信号实现分选的基础上，选取待识信号的瞬时频率作为识别特征，利用最近邻方法对信号进行识别。
An algorithm based on the magnitude and phase Angle of the generalized phasor to measure instantaneous frequency and swing frequency while the power swing occurred is presented.
提出了一种基于综合相量幅值和相位变化规律实时测量电力系统振荡中振荡频率及瞬时频率的算法，利用三相电流经相应变换获得综合相量。
If a proper non - linear change of the instantaneous frequency is realized, we can get a frequency spectrum whose input is the mean of the reciprocals of bed attenuation coefficients.
如果把瞬时频率作适当的非线性变化，就可以得到一个以地层衰减率的倒数的平均值为输入的频谱。
The main innovations embodied in this method are the introduction of the intrinsic mode functions based on local properties of signals, which make the instantaneous frequency meaningful.
局域波分析方法的重大突破在于用基于信号局部特征的多个基本模式分量来描述信号，并赋予每个基本模式分量具有实际物理意义的瞬时频率。
Three features parameters derived from the instantaneous amplitude, instantaneous phase, instantaneous frequency and power spectrum of analogue modulated signals are presented in this article.
首先介绍从信号幅度、相位、频率及功率谱等特性中提取的三种特征参数，应用这三种参数采用人工神经网络对模拟调制信号进行了识别。
The relationship between wavelet ridge and instantaneous frequency is analyzed and a new method of the mechanical characteristic test of the wiper motor based on wavelet ridge algorithm is proposed.
分析了小波脊线与信号瞬时频率的关系，提出了基于小波脊线的刮水器电动机机械特性测试新方法。
In the paper, a novel instantaneous frequency measure method, which is applicable for the frequency measure system of frequency hopping radar, is presented according to the digital phase-shift theory.
本文根据时钟数字移相原理，提出了一种新的瞬时测频方法，适用于捷变频雷达测频系统。
And now you will see an instantaneous increase in the precession frequency.
你们能看到旋进频率的，瞬间上升。
Sampling point number of every pulse cycle, instantaneous pulse frequency and period was gained with program operation.
经程序运算得到每个脉冲周期的采样点数，瞬时脉冲频率和周期。
Then proposes a method to detect the arrival time of instantaneous signal and the frequency composition under strong noise background.
提出了在强噪声背景下检测瞬时信号的到达时间和频率成分的方法。
The feature that structures have the selectivity to the earthquake motions frequency and structure response has the close corresponding relation with instantaneous energy spectrum is pointed out.
指出了结构对地震动的频率具有选择性，结构的响应与瞬时能量谱之间具有密切的对应关系。
The significant factors which exert an influence on instantaneous fluctuation of motor current are in sequence :Vari-speed wave form, vari-speed amplitude and vari-speed frequency.
在变速参数中影响电机瞬时电流波动最为显著的因素依次为变速波形、变速幅度和变速频率。
The significant factors which exert an influence on instantaneous fluctuation of motor current are in sequence :Vari-speed wave form, vari-speed amplitude and vari-speed frequency.
在变速参数中影响电机瞬时电流波动最为显著的因素依次为变速波形、变速幅度和变速频率。
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