The SD model of the compoundmodel 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。
2
In this paper, on the basis of research of generation mechanism of atomic model and compoundmodel, two model generation mode are proposed, and the approach to them is described in detail.
The model also includes a set of reusable model elements that are useful in creating some of the compound elements; at least using these is simpler than creating them by hand.