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。
The metadata warehouse of electrical power corporations included meta object model package, foundation package, resources package, analysis package and management package.
该电力企业数据仓库元数据仓储分为元对象模型包、基础包、资源包、分析包、管理包等。
The metadata warehouse of electrical power corporations included meta object model package, foundation package, resources package, analysis package and management package.
该电力企业数据仓库元数据仓储分为元对象模型包、基础包、资源包、分析包、管理包等。
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