1) choi-Williams trispectrum
Choi-Williams三谱
2) Choi Williams Distribution
Choi-Williams
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 transform
Choi-Williams变换
1.
The time-frequency characteristics ofs lift signals at different cavitating regimes were obtained by using Choi-Williams transform and wavelet analysis technique.
利用时频分析中的Choi-Williams变换和小波变换对水翼升力信号进行了分析处理,得到了水翼升力信号在不同空化阶段的时频特征。
5) 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。
6) 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。
补充资料：《佩文斋广群芳谱·药谱》
《佩文斋广群芳谱·药谱》 《佩文斋广群芳谱·药谱》 药学著作。又名《广群芳谱·药谱》。八卷。清·刘灏著。刊于1708年。本书为《佩文斋广群芳谱》卷九十三-一百，共收药物720余种，系在《二如亭群芳谱·药谱》的基础上增补而成。每种药物标记的“原”字下，均为《群芳谱》原文，“增”字下，为新增加的内容，特别是新增的“汇考”及“集藻”二项，补充各种文史资料尤为丰富。此外还新增补了一些新药。但却删去了原书中种植、修治、服食、疗治等内容。现存三种清刻本，及商务印局馆铅印本。
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参考词条