In the view of feature signal extraction, the local wave time-frequency analysis and information entropy were used to deal with fault diagnosis.

从特征信号提取的角度出发，采用局域波时频分析和信息熵结合的方法进行往复式压缩机故障诊断。

youdao

A maximum entropy model of feature extraction for the gas disaster information is established, with the training algorithm of the maximum entropy presented.

以最大熵原理为基础，建立了最大熵瓦斯灾害信息特征提取模型，提出了最大熵模型的参数训练算法。

youdao

Text feature extraction and text categorization is the focal point of basic research in the field of intelligent information service system.

文本信息特征提取和文本分类是当前智能信息服务系统基础研究的重点。

youdao