The temperature of surface zone in mass concrete under different boundaries is controlled by semi infinitemodel, and is transferred to and calculated by an equivalent .
利用混凝土传热的延迟性质，研究了任意降温过程中半无限平面问题无限平面化的条件。
2
Infinite decompositions can easily occur in larger composite processes, where maintaining a global view of the model becomes difficult.
在较大的组合流程中容易出现无限分解的现象，而且维护模型的全局视图也变得相当困难。
3
Two basic assumptions of the classical economic order quantity (EOQ) model are the model has infinite horizon and the costs are static.