1) Choi-Willams time-frequency distribution
Choi-Willams时频分布
2) Choi-Williams time-frequency distribution
Choi-Williams 时频分布
1.
Based on the principle of Choi-Williams time-frequency distribution the relationship between fric- tion coefficient and friction-induced noise was analyzed.
基于 Choi-Williams 时频分布原理分析了试验过程中摩擦噪声的发生与摩擦系数的相关性,发现摩擦噪声信号与摩擦系数信号的 Choi-Williams 时频分布具有很好的一致性,并从摩擦学的角度初步探讨了摩擦噪声引发的机理。
3) Choi-Williams distribution
Choi-Williams分布
1.
Using Choi-Williams distribution to extract feature from signal can effectively inhibit Wigner-Ville distribution s cross-terms,but meanwhile,decreast the aggregation of time-frequency.
利用Choi-Williams分布,可以有效地抑制上述存在的交叉项问题,但其时频聚集性有所下降。
2.
In this paper, the frequency characteristics of six cases of normal first and second heart sounds and one case of abnormal heart sound were analyzed by using wavelet transform and Choi-Williams distribution.
我们分别采用小波变换和Choi-Williams分布两种方法对六例正常第一、第二心音和一例异常心音的频率特性进行了研究。
4) Choi-Williams energy distribution
Choi-Williams能量分布
1.
A new time-frequency signal analysis method for array acoustic logging signal data analysis,Choi-Williams energy distribution,based on local correlation distribution of signal energy between time and frequency domains was proposed in this paper.
对多极子阵列声波测井信号,提出了一种基于信号时、频局域相关能量的新的时-频信号分析方法,Choi-Williams能量分布,它有着较明确的物理意义。
5) time-frequency distribution
时-频分布
1.
Preliminary analysis of time-frequency distribution of transient evoked otoacoustic emission in normal hearing human subjects;
正常人耳瞬态诱发耳声发射的时-频分布初步分析
2.
Thus, the standard time-frequency distribution images of all fault conditions including the gap abrasion in-formation of the main bearing can be defined.
通过该方法,可以得到含有内燃机主轴承间隙磨损状态的时频信息,定义出各个标准故障状态的时-频分布图,建立了基于图像匹配技术的内燃机主轴承磨损故障诊断模型。
6) time frequency distribution
时频分布
1.
A signal adaptive time frequency distribution(TFD) radial Gausian kernel TFD is studied.
对一种可调核函数的时频分布——径向高斯核函数时频分布 (RGKD)进行了研究 ,并将径向高斯核函数时频分布引入机械故障诊断。
2.
The time frequency distribution (TFD) can analyze non stationary signals in both time and frequency domain.
基于时频分布能同时分析信号在时间域和频率域的特点 ,针对 CDMA Overlay通信系统中时变窄带干扰抑制问题 ,提出了一种广义的时频分布——时变换域分布 ,利用接收信号的时变换域分布获得干扰的瞬时频率 ,并据此设计相应的时变滤波器对干扰进行抑制 。
3.
According to the seismic signals produced by moving targets such as the persons and vehicles moving on the ground, this paper studies their time frequency distribution characteristics by using the typicae time frequency analyzing method STFT so that modified complex convolution time varying filter method is used to do signal detection, thus improving the ratio of signal to noise.
针对人员、车辆等地面目标运动时产生的地震动信号 ,通过典型时频分析方法STFT研究其时频分布特性 ,进而应用修改的复数卷积时变滤波方法进行信号检测 ,使信号信噪比得以提高 ,可从中提取更有效的特征向量为目标识别所
补充资料：哭李频员外时在建川
【诗文】：
出麾临建水，下世在公堂。
苦集休开箧，清资罢转郎。
瘴中无子奠，岭外一妻孀。
定是浮香骨，东归就故乡。
【注释】：
【出处】：
全唐诗：卷716-35
出麾临建水，下世在公堂。
苦集休开箧，清资罢转郎。
瘴中无子奠，岭外一妻孀。
定是浮香骨，东归就故乡。
【注释】：
【出处】：
全唐诗：卷716-35
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