能否对抗预警卫星的早期预警探测是弹道导弹主动段突防的关键。结合导弹主动段飞行仿真、主动段红外特性计算和预警卫星红外探测仿真,基于马尔可夫链蒙特卡洛(Markov chain Monte Carlo,MCMC)方法构建了导弹主动段突防仿真模型,并建立...能否对抗预警卫星的早期预警探测是弹道导弹主动段突防的关键。结合导弹主动段飞行仿真、主动段红外特性计算和预警卫星红外探测仿真,基于马尔可夫链蒙特卡洛(Markov chain Monte Carlo,MCMC)方法构建了导弹主动段突防仿真模型,并建立了导弹主动突防参数灵敏度分析的响应面近似函数模型。通过导弹主动段突防仿真与参数分析算例,定量给出了导弹主动段性能参数对其突防能力的影响,验证了方法的有效性。展开更多
The high-performance electromagnetic(EM)wave absorption material Ba(Co Ti)_(x)Fe_(12-2x)O19@Bi Fe O_(3)was prepared by solid-state reaction,and its EM wave absorption properties were deeply studied.The results reveale...The high-performance electromagnetic(EM)wave absorption material Ba(Co Ti)_(x)Fe_(12-2x)O19@Bi Fe O_(3)was prepared by solid-state reaction,and its EM wave absorption properties were deeply studied.The results revealed that Ba(Co Ti)x Fe12-2x O19@Bi Fe O_(3)could obtain excellent absorption properties in hundreds of megahertz by adjusting the Co^(2+)-Ti^(4+)content.The best comprehensive property was obtained for x=1.2,where the optimal reflection loss(RL)value reaches-30.42 d B at about 600 MHz with thickness of 3.5 mm,and the corresponding effective absorption band covers the frequency range of 437 MHz-1 GHz.Moreover,the EM wave absorption mechanism was studied based on the simulation methods.The simulated results showed that the excellent EM wave absorption properties of Ba(Co Ti)_(x)Fe_(12-2x)O19@Bi Fe O_(3)mainly originated from the internal loss caused by natural resonance,and the interface cancelation further improved the absorption properties and resulted in RL peaks.展开更多
文摘能否对抗预警卫星的早期预警探测是弹道导弹主动段突防的关键。结合导弹主动段飞行仿真、主动段红外特性计算和预警卫星红外探测仿真,基于马尔可夫链蒙特卡洛(Markov chain Monte Carlo,MCMC)方法构建了导弹主动段突防仿真模型,并建立了导弹主动突防参数灵敏度分析的响应面近似函数模型。通过导弹主动段突防仿真与参数分析算例,定量给出了导弹主动段性能参数对其突防能力的影响,验证了方法的有效性。
基金Project supported by the National Natural Science Foundation of China(Grant No.11574122)the Joint Fund of Equipment Pre-Research and Ministry of Education,China(Grant No.6141A02033242)。
文摘The high-performance electromagnetic(EM)wave absorption material Ba(Co Ti)_(x)Fe_(12-2x)O19@Bi Fe O_(3)was prepared by solid-state reaction,and its EM wave absorption properties were deeply studied.The results revealed that Ba(Co Ti)x Fe12-2x O19@Bi Fe O_(3)could obtain excellent absorption properties in hundreds of megahertz by adjusting the Co^(2+)-Ti^(4+)content.The best comprehensive property was obtained for x=1.2,where the optimal reflection loss(RL)value reaches-30.42 d B at about 600 MHz with thickness of 3.5 mm,and the corresponding effective absorption band covers the frequency range of 437 MHz-1 GHz.Moreover,the EM wave absorption mechanism was studied based on the simulation methods.The simulated results showed that the excellent EM wave absorption properties of Ba(Co Ti)_(x)Fe_(12-2x)O19@Bi Fe O_(3)mainly originated from the internal loss caused by natural resonance,and the interface cancelation further improved the absorption properties and resulted in RL peaks.
