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In time series analysis used in statistics and econometrics, autoregressive integrated moving average (ARIMA) and seasonal ARIMA (SARIMA) models are generalizations of the autoregressive moving average (ARMA) model to non-stationary series and periodic variation, respectively.
Free-body diagram of a U-channel synchronous linear motor. The view is perpendicular to the channel axis. The two coils at centre are mechanically connected, and are energized in "quadrature" (meaning a phase difference of 90° (π/2 radians) between the flux of the magnets and the flux of the coils).
The planning of Ciudad Lineal (1895-1910) published by Madrid Urbanization Company. Cross-section of a linear city, with wide highways with separate sections for vehicles, pedestrians and trams . The linear city is an urban plan for an elongated urban formation that was proposed by Arturo Soria y Mata in 1882. [ 1 ]