灰色系统理论是基于关联空间、光滑离散函数等概念定义灰导数与灰微分方程，进

而用离散数据列建立微分方程形式的动态模型，由于这是本征灰色系统的基本模型，而

且模型是近似的、非唯一的，故这种模型为灰色模型，记为GM（Grey Model），即灰

色模型是利用离散随机数经过生成变为随机性被显著削弱而且较有规律的生成数，建立

起的微分方程形式的模型，这样便于对其变化过程进行研究和描述。-Grey system theory is based on the relevance of space, smooth discrete function defined concepts such as derivative and ash gray differential equation, then the discrete form of the column to establish a dynamic model of differential equations, as this is intrinsic in the basic model of gray system, and the model is similar , non-sole, so the gray model for this model, denoted as GM (Grey Model), the gray model through the use of discrete random number generation is significantly weakened into a stochastic and build a few more laws, and establish the Differential Equation of the model, it is easy to carry out their research and describe the process of change.