最后，通过数学抽象，建立了在一般情况下，矿山生产规模与基建投资、经营成本、总成本关系的数学模型。

At last, by mathematical abstracting we can set up the general mathematical models to deseribe the relation of producing capacity between capital cost, cost of operation and total cost.

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以由串行生产线抽象而成的串联水箱系统为例，讨论了一类混杂系统（HS）建模的规律，从中探讨混杂系统建模的一般原则．。

The principle of a class of hybrid system modeling is investigated through an example abstracted from tandem production line, some common modelling principles for HS are given.

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