...平稳性检验；随机信号；替代数据；时频分析；改变点；观察尺度 [gap=687]Key words: communications technology; stationarity test; random signal; surrogate; time-frequency distribution; change-point; observati..
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Based on the stationarity test of time alignment, it can be determined that there is no cointegration between foreign exchange earnings from tourism and economic growth.
依据时间序列的平稳性检验可以判定：旅游外汇收入和经济增长两时间序列之间应不是协整的。
As an important tool of testing time series stationarity, unit root test is always used, and cointegration test is also often implied for judging long equilibrium between nonstationary variables.
单位根检验是计量经济学中检验时间序列数据平稳性的最重要工具，而协整检验则是用来判断非平稳变量之间是否存在长期均衡关系的常用方法。
The first deals with several i methods used to test stationarity, periodicity and guassianity of the recorded data of aircraft vibration.
第一部分介绍飞行器实测振动数据的平稳性、周期性和正态性检验的几种方法；
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