锯齿形格尼襟翼气动性能的实验研究

用低速风洞测力试验和襟翼处绕流的PIV测量试验研究锯齿形格尼襟翼在不同偏角下的增升效益.结果表明:锯齿形格尼襟翼能明显提高翼型的升力系数和大升力系数下的翼型升阻比,对于给定的襟翼弦长,存在一个最佳的襟翼偏角,在此偏角下,翼型升阻比不仅在大升力系数下有明显提高,而且在中小升力系数时升阻比也有一定的提高.PIV测量表明从锯齿形格尼襟翼的齿边向上卷起的流向涡使上翼面后部气流向翼型表面吸附,推迟了上翼面气流的分离.     

防空导弹可靠性指标与验证方法探讨

针对新型防空导弹的特点，指出可靠性是一种设计特性，必须从导弹研制初期就加以考虑，并贯穿于整个寿命周期。结合工程实践，给出了空空导弹可靠性指标的应用示例，探讨了防空导弹可靠性验证方法。所述内容对新型防空导弹可靠性指标的确定和验证工作具有一定的参考价值。     

在双流机场仪表进近程序中设立速度限制点（SLP）的研究

随着民航事业的不断发展，双流机场正逐步朝着西南地区航空枢纽港的预期目标迈进；与此同时，西南空管局管制中心也不断地刷新着自己的运行保障纪录。在双流机场的单跑道混合运行中，单位小时的最高起降架次超过30架次；日起降架次业已突破430架次。     

氙离子火箭发动机配电调节分系统的时序控制

本文从理论和实验两个方面对氙离子火箭发动机配电及控制系统进行了研究，并设计出以８０３１单片机为核心组成的微机实时监控系统。设计中，为了减少加热电源和阴极本身的热冲击，阴极电源分五档控制；考虑到束流电源的瞬变特性，为避免对发动机和电源产生不利的影响，采用了慢起动特性；对于在发动机工作过程中有时出现的过载、灭弧、高压打火或短路等现象，可以及时地发现并作出实时的处理和控制。     

氢涡轮泵转子轴向振动

若氢涡轮泵转子轴向固有频率低于工作转速，可能发生轴向共振与自激振动。报告研究轴向振动的机理和消除方法。     

汽车倒车测距仪的设计

本文介绍了汽车倒车测距仪的功能确定、测距原理、设计方法及技术实现，介绍了汽车与障碍物间距离测量的信号处理方法，论述了如何有效地测出并实时地显示出汽车与障碍物的距离，规定了各种不同的报警类型，对于相关类测量系统设计有一定的参考意义。     

An update global model of hmF2 from values estimated from ionosonde and COSMIC/FORMOSAT-3 radio occultation

In this paper, we present our recent work on developing an updated global model of the ionospheric F2 peak height hmF2 parameter by combining data from the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC/FORMOSAT-3) radio occultation (RO) measurements and from the extended global ionosonde stations. In particular, 10 Chinese ionosonde stations’ data are newly introduced into this study. The modeling technique used is based on a two-layer empirical orthogonal function (EOF) expansion. Global distributions of hmF2 maps calculated using the newly constructed global model and the one provided by the International Reference Ionosphere model (IRI-ITU-R) are compared with the global distributions of hmF2 obtained by the COSMIC RO measurements and quantitative statistical analysis of the differences between the model results and those of the COSMIC RO measurements is made for the low (2008) and high (2012) solar activity years. The obtained average root-mean-square differences (RMSEs) for our model are 27.7 km (11.1%) and 31.0 km (9.8%), respectively for the years 2008 and 2012, whereas those for the IRI-ITU-R model are 39.9 km (16.9%) and 35.0 km (11.6%), respectively. Comparison of the results calculated both by our model and the IRI-ITU-R model with the digisonde observation is also made. The comparisons show that the newly constructed global hmF2 model can reproduce reasonably well the observations and perform better than IRI-ITU-R model.