在混合动态理论的基础上对于实际存货系统建立了新的统一的混合动态模型.该模型中既含有连续变量又含有离散变量,并且有刻画它们变化及其相互作用的数量关系.该模型的统一性是指其具有很强的包容性,不仅可以包容库存系统中所出现的各种各样的离散现象,而且可以包容先前所建立的各种关于存货系统的数学模型. Based on the hybrid dynamic theory, a new unified hybrid dynamic model is established for the actual inventory system, which contains both continuous variables and discrete variables, and depicts the quantitative relationship between them and their interactions. Sex means that it is highly inclusive, not only to accommodate a wide variety of discrete phenomena that occur in inventory systems, but also to accommodate previously established mathematical models of inventory systems.