Parameters of the dynamic statistical model are the time-varyingparameters, variation of parameter reflects the variable trend of seepage.
动态模型的统计参数是随时间变化的时变参数，参数的变化反映了大坝的渗流变化趋势。
2
The dynamic data forecasting model of ground settlement is studied, a new prediction model of grey-time serial with time-varyingparameters characters is proposed.
The results showed that the change of time-varyingparameters (coefficient) in dynamic AR model has a regularity. Its increments are piled up by some simple period functions.