Application of Grey—neural networks Model on Forecastingthe Water Quality

Grey—neural networks model combined by grey forecasting model and artificial neural networks,we can forecast the lacustrine permanganate value.It is designed to attach importance to the unknown connection between forecasting value and real value which is obtained by GM(1,1) model with artificial neural networks and to forecast again.It is extremely feasible and simple in practice.Forecasting lacustrine permanganate value accurately provides significant scientific basis for harness, controlling the lake eutrophication and making full use of the natural resources, programming, managing and deciding.