机场低空风切变气象服务探索

一、概述2006年5月10日傍晚11:18(UTC),CSC8705航班在深圳机场五边9公里正常进近并获得塔台落地许可(R/W15,地面风250度,8米/秒,QNH1010)。11:20机组报告复飞,原因是突然遭遇近10米/秒的顺风。CSC8705航班后改用R/W33,于11:38安全落地。事后机组反映CSC8705在跑道头2米高度复飞     

星间红外探测与测量系统

文章主要介绍了具有凝视成像功能的红外探测系统的研究和设计。首先简要描述了红外测角系统的组成和工作原理；然后重点论述了红外探测系统的性能指标和光学设计；最后对红外探测系统设计研究作了总结和展望。     

一种在SAR图像中进行目标识别的多尺度模型

本文基于SAR相干成像的原理，利用当图像分辨率改变时，自然景物和人工目标班点模式变化方式的不同，提出了一种从自然景物中识别人工目标的多尺度模型，并研究了此模型在不同分辨率图像中的性质及应用。     

空间辐射散热器含液滴介质的辐射特性和辐射传热

本文从米氏电磁散射理论出发，计算了含液滴介质的辐射特性。考察了中向同性散射能量传递份额的再分配，导出了吸收、发射、各几同性散射介质的辐射传递系数。计算了空间辐射散热器液滴层瞬态辐射换热，经与文献［４，５］的比较表明，本文所导出的辐射传递系数计算方法正确，精度高。用计算机辅助实验，分析液滴发生器产生粒子的大小、粒径分布对瞬态辐射换热的影响，可减少空间辐射散热器设计过程中的实验次数。     

聚醚聚氨醋推进剂中硝基增塑剂的迁移

研究了含有大剂量ＦＹＺ—１增塑剂配方中ＦＹＺ—１增塑剂迁移的影响因素。探讨了ＦＹＺ—１增塑剂在ＡＰ／ＨＭＸ／Ａ１／ＦＹＺ－１／聚醚推进剂中稳定存在的原因，提出了抑制配方中ＦＹＺ—１增塑剂迁移的方法。     

封头补强技术研究

研究了碳纤维／环氧复合材料φ１５０ｍｍ和φ４８０ｍｍ压力容器封头的局部补强方法和工艺，试验结果表明：φ４８０ｍｍ压力容器经在大金属件边缘补强后改变了水压爆破时金属件飞出的现象，纤维强度得以充分发挥而使筒身段纵环向同时破坏；φ１５０ｍｍ压力容器的应力平衡系数可由０．７５提高到０．８５以上，筒身段纵向纤维发挥强度由２０９０ＭＰａ提高到２３３６ＭＰａ，提高约１１．８％。由此可见，壳体铺层设计与封头补强巧妙地结合是壳体优化设计的重要方法，是充分发挥纵向纤维强度的有效措施。     

银河仿真机半实物仿真方法

本文分析某型号运载工具姿态控制系统仿真实验的实例,说明使用银河仿真机完成此类实验的方法。     

Changes in organ perfusion and weight ratios in post-simulated microgravity recovery

Head-down tilt models have been used as ground-based simulations of microgravity. Our previous animal research has demonstrated that there are significant changes in fluid distribution within 2 h after placement in a 45 degrees head-down tilt (45HDT) position and these changes in fluid distribution were still present after 14 days of 45HDT. Consequently, we investigated changes in fluid distribution during recovery from 16 days of 45HDT. Changes in radioactive tracer distribution and organ/body weight ratio were examined in rats randomly assigned to a 45HDT or prone control group. The 45HDT rats were suspended for 16 days and then allowed to recover at the prone position 0, 77, 101, or 125 h post-suspension. Animals were injected with technetium-labeled diethylenetriamine pentaacetate (99mTcDTPA, MW=492 amu, physical half-life of 6.02 h) and then killed 30 min post-injection. Lungs, heart, liver, spleen, kidneys, and brain were harvested, weighed, and measured for radioactive counts. Statistical analyses included two-way analysis of variance (ANOVA) that compared 45HDT versus controls at the four experimental time points. The organ weight divided by the body weight ratio for the brain, heart, kidneys and liver in the 45HDT rats was significantly different than the control rats, regardless of time (treatment). There was no difference between the different time points (time). The average 99mTcDTPA count divided by the organ weight ratio values for the heart, liver, and spleen were significantly higher in the 45HDT group than the control group. The average counts for the heart and spleen were significantly higher at 77, 101, and 125 h than at time zero. We conclude that the major organs have different recovery patterns after 45HDT for 16 days in the rat.