Methods: Using the SD model to build the SD diagram and using VENSIM to do stimulation analysis and intervention.
方法：用流率基本入树建模法构建系统流图，用VENSIM软件进行模拟分析和干预。
The SD model of the compound model can dynamically determine the structure of land-use system in system idea and then better solve the first problem.
本复合模型中的SD模型能从系统的观点动态地确定土地利用系统的结构，较好地解决前一个问题。
Methods: The SD diabetic rats model was made by Linnesulin.
方法：用链脲佐菌素制备sd大鼠糖尿病模型。
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