During the course of ionospheric heating experiments, researchers at the European Incoherent Scatter Scientific Association (EISCAT) observed an apparent electron density enhancement. The enhancement extended over a w...During the course of ionospheric heating experiments, researchers at the European Incoherent Scatter Scientific Association (EISCAT) observed an apparent electron density enhancement. The enhancement extended over a wide range of altitudes, above the reflection altitude of the high-frequency pump wave. However, whether this enhancement actually corresponds to a true enhancement in electron density remains an open question. When the dispersion relation of ion acoustic waves is followed, the frequency ratio of the enhanced ion line to the background ion line suggests that the profile of the effective ion mass may have remained unchanged. Furthermore, the solar radio flux and ion drift velocity indicate no significant changes in the ion species and their densities. In conclusion, the electron density enhancement observed at EISCAT should not, in fact, be considered a true enhancement.展开更多
针对网络中心化C4ISR系统结构的定量设计与分析问题,以网络中心战结构模型和观察、调整、决策以及行动(observe,orient,decide,act,OODA)过程模型为理论依据,建立了系统结构"五环"概念,采用网络化效能因子(coefficient of net...针对网络中心化C4ISR系统结构的定量设计与分析问题,以网络中心战结构模型和观察、调整、决策以及行动(observe,orient,decide,act,OODA)过程模型为理论依据,建立了系统结构"五环"概念,采用网络化效能因子(coefficient of networked effectiveness,CNE)衡量系统结构的网络化效能,形成系统结构"五环"效能表征模型,并给出了指导网络中心化C4ISR系统结构设计的若干推论,仿真实验验证了表征模型的有效性。展开更多
基金supported by research organizations in China (CRIRP), Finland (SA), Japan (NIPR and STEL), Norway (NFR), Sweden (VR), and the United Kingdom (NERC)supported by the Taishan Scholars Project of Shandong Province (Grant No. ts20190968)supported by the foundation of National Key Laboratory of Electromagnetic Environment (Grant No. 6142403230303)
文摘During the course of ionospheric heating experiments, researchers at the European Incoherent Scatter Scientific Association (EISCAT) observed an apparent electron density enhancement. The enhancement extended over a wide range of altitudes, above the reflection altitude of the high-frequency pump wave. However, whether this enhancement actually corresponds to a true enhancement in electron density remains an open question. When the dispersion relation of ion acoustic waves is followed, the frequency ratio of the enhanced ion line to the background ion line suggests that the profile of the effective ion mass may have remained unchanged. Furthermore, the solar radio flux and ion drift velocity indicate no significant changes in the ion species and their densities. In conclusion, the electron density enhancement observed at EISCAT should not, in fact, be considered a true enhancement.
文摘针对网络中心化C4ISR系统结构的定量设计与分析问题,以网络中心战结构模型和观察、调整、决策以及行动(observe,orient,decide,act,OODA)过程模型为理论依据,建立了系统结构"五环"概念,采用网络化效能因子(coefficient of networked effectiveness,CNE)衡量系统结构的网络化效能,形成系统结构"五环"效能表征模型,并给出了指导网络中心化C4ISR系统结构设计的若干推论,仿真实验验证了表征模型的有效性。
