三种环境动力学模型建模方式的比较

在农药和化学品的风险评估工作中，环境动力学模型正得到越来越多的应用。采用Stella软件、Matlab M文件和Matlab Simulink 组件3种建模方式分别构建了微宇宙、湖泊和海湾系统的多介质环境动力学模型，并对3种方式的建模难度、计算耗时及模型直观性进行了比较。研究结果表明：Stella模型最直观，但提供的计算方法有限，更适用于微分方程数量不多且计算周期短的模型;M文件模型建模速度最快，但在直观性和计算速度上没有优势，不建议在环境动力学模型中使用;Simulink模型兼具直观性和计算速度快的优点，无论微分方程数量多少，在需要进行长周期计算的模型中都最具优势。

Comparison of Three Modeling Methods for Environmental Dynamic Model

Environmental dynamic models are being utilized increasingly in risk assessment of pesticides and chemicals. The multimedia environmental dynamic models for microcosm,lake and bay system were built by 3 modeling methods,such as Stella software, Matlab M file and Matlab Simulink module. The degree of modeling difficulty,the computation time and the model intuitiveness of the three methods were compared. The research results show that：The Stella model has the most intuitive graphs,but provides limited computational methods,it is more applicable to models with fewer differential equations and shorter simulation duration;The M file model has the fastest modeling speed,but has no advantage on intuitiveness and computation speed,therefore it is not recommended to use in environmental dynamic modeling;The Simulink model is characterized by good intuitiveness and fast calculation,so it is advantageous for models requiring long simulation duration,regardless of the number of differential equations.