Optimized Selection Method of Air Combat Course of Action under Stochastic Uncertainty

Aiming at the design problem of aviation swarm combat course of action(COA),considering the influence of stochastic parameters in the causal relationship model and optimization problem model,according to the dynamic influence net(DIN)theory,stochastic simulation technique,feedforward neural network(FNN)function approximation technique and multi-objective artificial fish school algorithm(MOAFSA),this paper proposed a COA optimized method based on DIN and multi-objective stochastic chance constraint optimization for aviation swarm combat.First,on the basis of establishing the overall framework of the model and defining the elements of causal relationship modeling,the static and dynamic causal relationship modeling and optimization problem modeling were carried out respectively.Second,the probability propagation mechanism of DIN was established,which mainly included two aspects,i.e.,the overall process and the specific algorithm.Then,input and output data were generated based on stochastic simulation.According to these data,FNN was adopted for function approximation,and MOAFSA was adopted for iterative optimization.Finally,the rationality of the model,and the effectiveness and superiority of the algorithm were verified through multiple sets of simulation cases.

Symbols of Architectural Metaphors in The Portrait of a Lady

This essay starts with presenting symbols of houses and gardens along with the textual evidence in The Portrait of a Lady.By analyzing these architectural metaphors and the symbolic trajectory they chart from the perspective of their aesthetic competence and functional competence,a conclusion is met of the finding below:in the Portrait of a Lady,these symbolic architectural metaphors are not only expressing characters’psychological state of mind but as well succeeding in suggesting a course of action.