图 2.8.Methods of Forecasting Trend Seasonal Series more complex time series:Trend Seasonality 0 35 30 20 15 10 5 0 Time Seasonal Decomposition Using Moving Averages Winter's Method(triple exponential smoothing)2.8. Methods of Forecasting Trend Seasonal Series Seasonal Decomposition Using Moving Averages A more complex time series: Trend + Seasonality Winter’s Method (triple exponential smoothing)