For the high altitude cruising flight phase of a hypersonic cruise missile （HCM）, a relative motion mod- el between the missile and the target is established by defining virtual target and combining the theory of th...For the high altitude cruising flight phase of a hypersonic cruise missile （HCM）, a relative motion mod- el between the missile and the target is established by defining virtual target and combining the theory of the dif- ferential geometry with missile motion equations. Based on the model, the motion between the missile and the tar- get is considered as a single target differential game problem, and a new open-loop differential game midcourse guidance law （DGMGL） is deduced by solving the corresponding Hamiltonian Function. Meanwhile, a new struc- ture of a closed-loop DGMGL is presented and the training data for back propagation neural network （BPNN） are designed. By combining the theory of BPNN with the open-loop DGMGL obtained above, the law intelligence is realized. Finally, simulation is carried out and the validity of the law is testified.展开更多
Ministry of Education put forward to adhere to the employment-oriented development of higher vocational education. The key of Employment-oriented is to enhance and train Students＇ Employability and competitiveness. I...Ministry of Education put forward to adhere to the employment-oriented development of higher vocational education. The key of Employment-oriented is to enhance and train Students＇ Employability and competitiveness. In this paper, the writer analyzed the vocational colleges engineering graduates employment status quo, investigated many unfavorable factors affecting the employment of graduates. Finally, the write strive to fred countermeasures come to reduce or eliminate the adverse factors. Current graduates＇ increasingly severe employment pressure situation and the analysis to guide and promote the employment of graduates of vocational college graduates have some practical significance.展开更多
文摘For the high altitude cruising flight phase of a hypersonic cruise missile （HCM）, a relative motion mod- el between the missile and the target is established by defining virtual target and combining the theory of the dif- ferential geometry with missile motion equations. Based on the model, the motion between the missile and the tar- get is considered as a single target differential game problem, and a new open-loop differential game midcourse guidance law （DGMGL） is deduced by solving the corresponding Hamiltonian Function. Meanwhile, a new struc- ture of a closed-loop DGMGL is presented and the training data for back propagation neural network （BPNN） are designed. By combining the theory of BPNN with the open-loop DGMGL obtained above, the law intelligence is realized. Finally, simulation is carried out and the validity of the law is testified.
文摘Ministry of Education put forward to adhere to the employment-oriented development of higher vocational education. The key of Employment-oriented is to enhance and train Students＇ Employability and competitiveness. In this paper, the writer analyzed the vocational colleges engineering graduates employment status quo, investigated many unfavorable factors affecting the employment of graduates. Finally, the write strive to fred countermeasures come to reduce or eliminate the adverse factors. Current graduates＇ increasingly severe employment pressure situation and the analysis to guide and promote the employment of graduates of vocational college graduates have some practical significance.
