一、预测模型的建立灰色系统理论是将控制论的观点和方法延伸到社会、经济系统的产物。所谓灰色系统是指那些既含已知信息(白色参数)又含未知和非确知息信(黑色参数)的信息系统。诸如农业、生态、生物、经济、管理、能量、工程技术等都是灰色系统。灰色系统理论称抽象系统的逆过程为灰色过程,这种逆过程所获得的模型称为灰色模型(GREY MODEL),简称 I. THE ESTABLISHMENT OF THE FORECAST MODES Gray system theory is the product of extending the viewpoints and methods of cybernetics to the social and economic systems. The so-called gray system refers to those containing both known information (white parameters), as well as information systems with unknown and unidentified information (black parameters). Such as agriculture, ecology, biology, economics, management, energy, engineering and so on are gray systems. The gray system theory calls the inverse process of the abstract system a gray process. The model obtained in this inverse process is called the gray model (GRAY MODEL)