“…First, different from other traditional models, a much more powerful method with its merits of handling the problem of data complexity, i.e., WD-FNN-ADD, is employed in hospital visits forecasting. Second, to the best of our knowledge, although the principle of "decomposition and ensemble" has be widely applied in time series forecasting, e.g., crude oil price (Garg et al, 2012;Tang et al, 2012;Yu et al, 2014;Yu et al, 2015), hydropower consumption and nuclear consumption forecasting , such a hybrid decomposition-and-ensemble model, i.e., WD-FNN-ADD, hasn't been introduced to hospital visits analysis or forecasting research. Therefore, the gap is filled via this study applying WD-FNN-ADD to the field of hospital visits forecasting.…”