摘要
根据中心城市粮食安全预警指标体系,采用系统动力方法,将中心城市粮食安全预警模型分为供给、库存和需求3个子系统,选择了系统变量,绘制了系统存量流量图,写出了模型的基本假设和变量等式,建立了预警模型。
Based on System Dynamics,according to the indicator system of food security early warning,this paper divides food security early warning model of central city into three sub-systems： supply,inventory,and demand,chooses system variables,plots the stock-flow variables charts,writes out the basic assumptions of the model and the equation,and establishes the early warning model.
基金
教育部科学技术研究重点项目(编号:00024)
关键词
中心城市
粮食安全
系统动力学
预警模型
Central cities
Food security
System dynamics
Early warning model
