Finally realized perception expression from analysis model to design model according to perception expression method,and reflected the visual analysis result to the design model.

RDF/XML-based knowledge representation and acquisition for aircraft engine design;

The knowledge representation of chinese language in Chinese tutor;

Energy characteristic state model for functional knowledge representation of hydraulic valves and its application

Studying of crop assessment system and its knowledge expression in agriculture;

In the end, comprehensive knowledge expression including " rule+frame+semantic network+neural network+procedure " has been put forward.

Application of STEP techniques in knowledge expression from the viewpoint of knowledge modeling, knowledge compiling and physical realization are discussed to promote seamless integration between KBS and CAD module.

Based on the database technique of C++ Builder, a practicable Knowledge Acquisition System (KAS) is designed with a flexible and universal knowledge express method.