Nonstationary time series [经] 非平稳时间序列
nonhomogeneous nonstationary time series [经] 非齐次非平稳时间序列
homogeneous nonstationary time series [数] 齐次非平稳时间序列
modeling nonstationary time series 非平稳时间序列建模
nonstationary panel time series 非平稳面板时间序列
Because stock forecasting is a uncertain, nonlinear and nonstationary time series problem, it is difficult to achieve a satisfying prediction effect by traditional methods.
由于股票预测是不确定、非线性、非平稳的时间序列问题，传统的方法往往难以取得满意的预测效果。
A state space approach for the modeling of nonstationary time series is presented.
非平稳时间序列的状态空间建模技术被用于陀螺漂移分析。
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。
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