通过描述环境要素的序列、要素之间的联系和差异、映象的类型、细节和规模的变化等来提供信息，即构造模型。在科学研究中，经常用模型作为实际对象的代替物或模拟物，它们与被研究的对象之间存在某种程度的一致或相似的映射关系：借助模型所获得的结论和推论又可转用于实际对象上-Elements of the environment by describing the sequence of elements of the links and differences between, image type, and changes in detail and scale to provide information that is structural model. In scientific research, often the object model as a substitute for the actual or simulated objects, which objects to be studied with some degree of identical or similar mapping: With the model conclusions and inferences can be obtained by switching the actual object