Response of the low latitude geomagnetic field to the major proton event of November 2001

A major solar flare eruption occurred at 16:20 UT on 4 November 2001, followed by strong solar radiation storm and proton event recorded by the SOHO and other interplanetary satellites. Coronal mass ejection associated with the flare event triggered an interplanetary shock, which impacted the geomagnetic field after about 33 h. The shock impact was quite intense to produce a SSC magnitude of 80 nT in the low latitude ground magnetic records followed by sharp and deep main phase (Dst −300 nT) in the first stage, following the density (N_p) enhancement. High time resolution digital magnetic field data from the equatorial and low latitude stations in India are analyzed to study the influence of various IP parameters on the intensity and duration of the magnetic storm. A double step storm was found to be in progress caused by the multiple injections. During the period of recovery, after a period of 8 h, a third stage of depression in the ground magnetic field was set in, which corresponded to the southward directed Bz. The energy transfer processes associated with the event is presented.     

研究计划管理系统的Petri网论法

本文以图的形式给出Petri网的定义;通过导入“时间Place”和“象征”的附加描述,使Petri网成为扩充的Petri网(EPN);用EPN模拟计划管理系统,用EPN仿真器构画计划管理系统的图模型、求系统的时间参数、进行系统的优化。     

航空公司不安全事件发生率的贴近度研究

运用模糊数学中的Euclid贴近度方法,分析了中国民航2005—2009年各航空公司在各季度的亿吨公里不安全事件发生率数据,确定出航空公司各季度发生不安全事件的贴近关系为相邻季度的不安全事件发生率贴近度最大,且有第四季度不安全事件发生率与第三季度最贴近,第一季度与上一年第四季度不安全事件发生率的贴近度次之,之后依次是第二季度与第一季度、第三季度与第二季度。随着贴近度的变小,各季度与相邻前一季度不安全事件发生率的可比性变差。     

直升机驾驶人员的可靠性分析与研究

根据直升机的使用及型号研制中的经验教训,提出了在直升机的可靠性分析中必须考虑人的失误对直升机使用的安全性和可靠性的影响,并根据THERP(Technique for the Human Error Rate Prediction)方法,建立了人的失误的分析和计算程序,最后以直11型机为例详细地说明了THERP方法的应用。     

Interplanetary proton cumulated fluence model update

Solar particle events leading to important increase of particle fluxes at energies of order of magnitude ranging from MeV to GeV constitute an important hazard for space missions. They may lead to effects seen in microelectronics or damage to solar cells and constitute a potential hazard for manned missions. Cumulative damage is commonly expressed as a function of fluence which is defined as the integral of the flux over time. A priori deterministic estimates of the expected fluence cannot be made because over the time scale of a space mission, the fluence can be dominated by the contribution of a few rare and unpredictable high intensity events. Therefore, statistical approaches are required in order to estimate fluences likely to be encountered by a space mission in advance. This paper extends work done by Rosenqvist et al. [Rosenqvist, L., Hilgers, A., Evans, H., Daly, E., Hapgood, M., Stamper, R., Zwickl, R., Bourdarie, S., Boscher, D. Toolkit for updating interplanetary proton-cumulated fluence models. J. Spacecraft Rockets, 42(6), 1077–1090, 2005] to describe an updated predictive engineering model for the proton interplanetary fluence with energies >30 MeV. This model is derived from a complete list of solar proton fluences based on data from a number of calibrated sources covering almost three solar cycles.     

Cosmic radiation exposure of aircraft occupants on simulated high-latitude flights during solar proton events from 1 January 1986 through 1 January 2008

From 1 January 1986 through 1 January 2008, GOES satellites recorded 170 solar proton events. For 169 of these events, we estimated effective and equivalent dose rates and doses of galactic cosmic radiation (GCR) and solar cosmic radiation (SCR), received by aircraft occupants on simulated high-latitude flights. Dose rate and dose estimates that follow are for altitudes 30, 40, 50, and 60 kft, in that order.     

On geomagnetic variations during the August–September storms of 1859

Hourly magnetic readings of H and D from six geomagnetic observatories in Finland and Russia were utilized for analysis of the time behavior of the extreme space weather event of August/September 1859. The observatories cover about 200° in longitude and magnetic latitudes 45–60°N.     

FY—1C卫星空间粒子成分监测器及其探测结果

简要介绍了FY－1C星空间粒子成分监测器的任务目标、工作原理、创新特色及在轨探测结果。空间粒子成分监测器用于卫星轨道空间的带电粒子辐射监测，为卫星的在轨安全和抗辐射加固设计服务。监测器在世界上实现用1套传感器完成对高能电子、质子、α粒子至铁离子的全成分监测，使我国首次获得了870km高太阳同步轨道全空间的各种重离子分布、质子能谱分布和电子通量分布，捕捉到大量的地磁暴和太阳质子事件，获得了批重要的探测成果。     

SMP2仿真引擎的多核并行化

仿真模型可移植性规范2（SMP2）是由欧洲航天局制定并得到广泛应用的仿真模型开发与集     

任务系统软件体系结构风格研究与应用

本文以某型航电任务系统研发为背景，介绍了几种经典体系结构风格的设计特点和应用。理论和研发实践相结合，项目的顺利推进证明了软件体系结构风格的分析对明确设计思路和指导代码开发具有重要意义，加快了软件研发的进度，保证软件质量，同时又增加了系统的可扩展性，降低研发成本。