Application of backward reasoning in die design improvement;

Research and application of forward and backward reasoning based on binary taxonomic key;

Parallel backward reasoning study using fuzzy Petri net;

Taking turbo generator tripped accident as an example,the paper is concerned with the application of backward inference for equipment fault diagnosis and trouble-solving measures in an uncommon accident of turbine water induction.

The paper analyses the characters and shortcoming of the forward inference ,backward inference and the mixed inference which are usually used.

Briefly introduce and analyze the turbine groups vibrationg reasons and the ways of diagnosis vibration,and explaine how to diagnosis vibrating trouble with forward direction logic.

Finally, the expert system based on the forward reasoning was implemented.

Because of the limitation of the traditional forward reasoning method for fault diagnosis, a forward reasoning method for fault diagnosis based on BP neural networks is studied in this paper.

Thus,a consultative result can be obtained by the system using forward reasoning for the decision of structure engineer.

On the basis of these viewpoints, it presents a backward reasoning-based model integration method and implements the model,data and knowledge integration in a blackboard framework.