the high-order statistical time-frequency analysis 高阶谱时频分析方法
The time series analysis show that the two class of variables have one order negative correlation, and the trading activity has weekly seasonal effect.
时间序列分析显示两类变量都存在一阶负相关，而交易活动存在周日效应。
Order analysis based on FFT is a transform between time-domain signal and frequency-domain signal and furthermore, it is the most important vibration analysis of rotational machinery.
阶次分析是基于FFT的一种时频转换谱分析，它是变速旋转机械体振动分析的最重要的一种方法。
In order to achieve the purpose of improving the response speed and shortening the settlement time, this paper studied the fault alarm and data analysis.
通过研究故障报警和数据分析，提高响应速度，缩短解决问题时间，分析出故障多发工位。
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