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- Instantaneous Frequency Rate(IFR) 瞬时频率变化率
- Estimation of Instantaneous Frequency Rate for Multicomponent Polynominal Phase signals 多分量多项式相位信号瞬时频率变化率的估计
- instantaneous frequency rate 瞬时频率变化率
- The instantaneous frequency of seismic signal could be derived by Hil-bert transformation. 用希尔伯特变换的方法可以求出地震信号的瞬时频率.
- The excursion of instantaneous frequency representation will be resulted when EFT is applied to signals with rapidly varying frequency contents. 对于具有恒定幅度的调频信号而言，瞬时频率代表了其全部的信息，可以据此对信号进行识别和分类。
- It stems from the concept of instantaneous frequency, and it can describe accu-rately 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。
- 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。
- A new technique to estimate the Doppler frequency rate is proposed with high accuracy and low computation complexity. 本文提出了估算多普勒调频率的一种新方法,其精度高、计算量少。
- 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。
- Furthermore,by applying instantaneous frequency measurement algorithm to this system,we can get high estimation accuracy. 此外,还把瞬时测频算法应用到该系统中,取得了很高的测频精确度。
- Data that focus not on age but on length of service give similar results and confirm that the frequency rate of work accidents decreases with length of service. 事故的次数的多少与人的年龄无直接关系，但与服务的年限的长短有关，事故的频率随著服务年限的增长而减少。
- On the basis of this, the well restrained inverse acoustic impedance and instantaneous frequency are jointly used to predict the overpressure of Yangxia sag, Kuche depression. 在此基础上，利用井约束反演的波阻抗与瞬时频率联合对库车坳陷阳霞凹陷内的超压带进行了预测。
- 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. 对实测数据进行处理的结果表明,该方法能够实现无传感器的刮水器电动机机械特性快速准确测试。
- Based on the local characteristics of signals, a local wave method (LWM) can be employed to obtain the instantaneous frequency of signals and the Hilbert time frequency spectrum composed of an energy time frequency three dimensional distribution. 局域波法是基于信号局部特征 ,通过该方法可得到信号的瞬时频率和构成能量 -时间 -频率三维分布的Hil bert时频谱。
- These instantaneous frequencies are taken as the input pattern to train the Neural Network classifier. 这些瞬间频率可以被当作样本输入类神经网路分类器。
- Delpart N,et al.Asymptotic wavelet and gabor analys extraction of instantaneous frequencies[J].IEEE Trans.IT,1992(3). 吴江标;等.;基于小波变换的相位编码信号脉内特征提取[J]
- The results show that instantaneous phase has a better effect on weak signal detecting and anomalous point abstraction comparing with instantaneous amplitude and instantaneous frequency. 结果表明，相比于瞬时振幅、瞬时频率，瞬时相位对弱信号检测和异常点提取具有较好的效果。
- Based on superiority of HHT, the character of gravity tide and nonstationary processes of earthquake, we design characteristic parameters of instantaneous frequency of gravity tide. 结合HHT的优越性、固体潮的特点和地震的非平稳过程特性，设计重力固体潮地震前兆分析的瞬时频率特征参数；
- By a moving single period sine wave model, the instantaneous frequency of the signal is obtained, and then, by the integral of the instantaneous frequency, the PM signal wave is demodulated. 在调制信号是方波的情况下，给出了相位解调的仿真结果和其它参数的波动情况；
- apparent amplitude frequency rate 视幅频率
