Air threat assessment based on variable weight theory;

Application of the stochastic service system theory for threat assessment;

Implementation of an object-oriented rule language system and its application in threat assessment;

Aiming at the key problem of threat estimation and target assignment in beyond-visual-range(BVR) air combat,a new non-parameter threat estimation model was formulated based on characteristics of BVR air combat,which takes into account aircraft s combat effectiveness and situation superiority including angle superiority,distance superiority and velocity superiority.

Combined with the simultaneity and importance of the war-field threat estimation, the data warehouse of the model is defined.

Aiming at the problem whether the determining index is reasonable in threat estimation,this paper puts forward the processes of threat estimation based on the rough set theory,and studies the reduction methods of threat estimation condition attributes set,proves that rough set theory is feasible in threat estimation index reduction through practical examples.

Through analyzing the limitations of the simple fuzzy inference system applied in the state′s estimation,the article puts forward to an improvement method of applying adaptive network-based fuzzy inference system and constructs the practice system of the threat degree estimation.

This paper, based on many threaten assessment documents, proposed a simple and a practically method to calculate the threaten be between every side in combating under various ability.