中长期电力负荷预测matlab程序，包括线性模型，指数模型，对数模型，双曲线模型，S型曲线模型，多项式模型，灰色模型GM(1,1)，指数平滑模型等-Medium and long term power load forecasting matlab procedures, including linear model, exponential model, logarithmic model, hyperbolic model, S-curve model, polynomial model, gray model GM (1,1), exponential smoothing models