At present, the CAD system always USES hybrid representations of feature representation and boundary representation in order to take advantages of both representations.
目前，在CAD系统中，一般采用特征表示和边界表示的混合表示方法，以充分利用两种表示法的优点。
2
This rule is a hybrid knowledge representation method that the premise, conclusion and advice of the rules are conceptual graphs.
扩展产生式规则将规则的前提、结论和建议分别用概念图表示，是一种混合知识表示方法。
3
Several key techniques are described including the representation and classification of volume data, typical algorithms of surface rendering, volume rendering and hybrid rendering.