景象匹配正确定位概率的实验研究

景象匹配的理论分析结果揭示了景象匹配正确定位概率与实时图的信噪比和独立像元数的关系。文中通过对真实影像数据的景象匹配的结果统计给出了正确定位概率与信噪比和独立像元数的关系，并将该结果与理论结果进行了比较，对其中差异进行了分析解释。文中的结论可以用于景象匹配系统性能的精确分析。     

有分布质量系绳的卫星系统的动力学

以一组偏微分方程建立起的数学模型和采用距离速率控制算法来描述系统的受控运动。创建的递推算法用于计算系统的定常运动和称驻形。根据求解小偏差运动方程和通过边界条件求解特征根以判定驻形的稳定性。给出了模拟结果。     

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。     

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。     

用非线性有限元法分析金属基复合材料的叠层板壳

采用通用于复合材料叠层厚、薄板壳的Ｈｅｆｅｒｏｓｉｓ三维退化曲壳元，利用Ｈｉｌｌ屈服准则和层状模型法，对金属基复合材料叠层板壳进行了弹塑性分析。算例结果表明，所用方法是可靠的，精度良好。     

基于小波分解与分形内插相结合的地形数据压缩方法

地形匹配制导中需要使用大量的地形数据，因此有效的地形数据压缩技术是非常重要的。传统的地形数据压缩方法主要采用线性内插的方法，但这对于地形起伏较大的山区地形失真太大，不能满足高精度导航的要求。本文基于小波分解与分形内插相结合的方法，提出了一种新的地形数据压缩方法，它具有压缩比高，保真性好，解码快的特点，特别适合山区地形数据的压缩。     

Effect of fluid and salt supplements in preventing the development of "osteopenia" in hypokinetic rats

It has been suggested that a daily intake of fluid and salt supplements may be used to prevent bone demineralization in human subjects after prolonged exposure to hypokinesia (diminished muscular activity). Thus, the objective of this investigation was to evaluate the effect of fluid and salt supplementation in the prevention of development of osteoporosis in 64 Wistar rats with an initial body weight of 339-345 g, after exposure to 90 days of hypokinesia. They divided into 4 equal groups: the first group of rats placed under ordinary vivarium conditions and served as vivarium control; the second group were also placed under ordinary vivarium conditions but received daily fluid and salt supplements; the third group were subjected to pure hypokinesia, i.e. without the use of any preventive measures; and the fourth group were submitted to hypokinesia and received daily fluid and salt supplements. For the simulation of the hypokinetic effect the experimental group of rats were kept in small, individual, wooden cages. Through the experimental period the second and fourth group of rats received 8 ml/100 g body wt water and 5 ml 100 g body wt NaCl daily. By the end of the experimental period the animals were decapitated and the spongy matter of tibia and vertebrae of the rats were examined for changes referable to osteoporosis. It was found that the daily intake of fluid and salt supplements caused an increase in the volume density of primary spongiosa of bones. It was concluded that a daily intake of fluid and salt supplements may be used to prevent the development of osteoporosis in rats subjected to prolonged motor activity restriction.     

统计技术在复合材料制造过程中的应用

统计技术是质量管理中进行质量分析、质量控制和质量改进的重要工具。文章阐述了统计技术在复合材料过程控制中的应用，探讨了其应用范围、作用、办法及相关说明等内容。