Abstract：Self—nonself recognition model has the inherent weakness．In danger theory，sanger is the aim for recognition，so the problems in self—nonself recognition can be successfully avoided．Cloud model is an effective tool in transforming between qualitative concepts and their quantitative expressions．This paper uses the concept or cloud model to estimate systematic parameters and consequently presents the definition of danger signa1．Stimulate model including both self-nonself recognition method and danger recognition method is presented．
2012, Vol. 1 