工程设计问题求解的2＋3模型及其分形性质

研究了工程设计问题求解的一般过程，提出了大规模复杂工程设计决策的２＋３模型。这一模型的核心是基于三种基本运算的两个基本过程。随着设计问题复杂程度的增加，２＋３模型表现出分形几何描述的某些性质。所讨论的设计案例解释了这一模型的合理性。

2+3 model for engineering design problem''''s solving process and its fractal feature

The general process of engineering design problem's solving is investigated, and a decision-making model,2+3 model, is presented to cope with large-scale and complex engineering design problems. The core of the model is the two basic processes based on three basic operations. As the complex degree of design problems increases, the 2+3 model exhibits some fractal features. The design case discussed shows the validity of the model.