在嵌入式高性能计算机上的实时STAP验证

采用Ｉｎｔｅｌ Ｐａｒａｇｏｎ的一种２９个节点的加固型计算机机已实现了包括空时自适应处理（ＳＴＡＰ）算法的１６通道相控阵雷达的实时信号处理。讨论了有效地实现信号处理的每一步所采用的技术。已达到了３．１５ＧＦＬＯＰＳ的总吞吐率和４８％的处理效率，表明嵌入式高性能计算机在真实系统约束条件下能够接近达到他们宣传的最高吞吐率。     

对装备合成孔径雷达导引头的空对面导弹的误差分析

采用寻的制导误差分析确定了用于高精度空对面导弹的合成孔径雷达导引头的技术要求。所分析的制导概念是新的。它采用了新的硬件，尤其是高性能的数字计算机和具有导航性能而又紧凑到足以安装在战术导弹上的惯性传感器。新的制导方法的性能与常规的导的制导方法性能不同。它不会在飞行航线的最后时刻引起大的扰动。因此，通过把控制回路和跟踪回路分开可简化数学模拟。在最初的分析中，这样做减少了误差分析计算机的编程时间、运行时     

Immunological detection of small organic molecules in the presence of perchlorates: relevance to the life marker chip and life detection on Mars

The proposed ExoMars mission, due to launch in 2018, aims to look for evidence of extant and extinct life in martian rocks and regolith. Previous attempts to detect organic molecules of biological or abiotic origin on Mars have been unsuccessful, which may be attributable to destruction of these molecules by perchlorate salts during pyrolysis sample extraction techniques. Organic molecules can also be extracted and measured with solvent-based systems. The ExoMars payload includes the Life Marker Chip (LMC) instrument, capable of detecting biomarker molecules of extant and extinct Earth-like life in liquid extracts of martian samples with an antibody microarray assay. The aim of the work reported here was to investigate whether the presence of perchlorate salts, at levels similar to those at the NASA Phoenix landing site, would compromise the LMC extraction and detection method. To test this, we implemented an LMC-representative sample extraction process with an LMC-representative antibody assay and used these to extract and analyze a model sample that consisted of a Mars analog sample matrix (JSC Mars-1) spiked with a representative organic molecular target (pyrene, an example of abiotic meteoritic infall targets) in the presence of perchlorate salts. We found no significant change in immunoassay function when using pyrene standards with added perchlorate salts. When model samples spiked with perchlorate salts were subjected to an LMC-representative liquid extraction, immunoassays functioned in a liquid extract and detected extracted pyrene. For the same model sample matrix without perchlorate salts, we observed anomalous assay signals that coincided with yellow coloration of the extracts. This unexpected observation is being studied further. This initial study indicates that the presence of perchlorate salts, at levels similar to those detected at the NASA Phoenix landing site, is unlikely to prevent the LMC from extracting and detecting organic molecules from martian samples.     

采用高分辨率雷达的自动目标识别系统

本文提出了一种利用雷达传感器观测值对飞机目标联合跟踪和识别的系统。文中假设用于估计目标方向和识别目标的数据源高于分辨率雷达的距离剖面图序列。在包括目标数目以及它们的位置、方向和目标类型和完整的参数空间上运用后验分布完成推理判断。算法严格地依赖于适当地传感器和目标模型，从距离剖面图的似然值可得出目标方向，由目标动态确定目标方向的先验值。给出了高分辨率雷达数据的确定性模型和随机模型，对确定性模型研究了     

在天线阵列方向图合成中运用遗传算法降低旁瓣

给出了一种用任意几何结构的天线阵列方向图合成的简单灵活的遗传算法（ＧＡ）。与运用二进制编码和二进制交叉的常规遗传算法所不同的是，这种方法直接用复数染色体来代表阵列激励加权矢量，而且还在没胶叉址的情况下运用十进制线性交叉。与常规的遗传算法相比，该算法具有以下几个优点：给出了问题的简单明了的表示，简化了染色体的建立过程，完全避免了二进制编码和码解，因而简化了软件编程，减少了ＣＰＵ时间，该方法还使我们能     

波导喇叭理论的修正

许多作者已全面分析过波导喇叭，对于中高增益喇叭各种理论方法获得的结果基本一致。不过，对于低增益喇叭，用近似法来计算口径场不能获得精确的结果，会导致增益的误差。本文避开最通用的近似法，描述了一种修正后的分析方法。文中运用了１２ｄＢ喇叭的实验测量结果来证实为种理论。     

The relative role of visual and non-visual cues in determining the perceived direction of "up": experiments in parabolic flight

In order to measure the perceived direction of "up", subjects judged the three-dimensional shape of disks shaded to be compatible with illumination from particular directions. By finding which shaded disk appeared most convex, we were able to infer the perceived direction of illumination. This provides an indirect measure of the subject's perception of the direction of "up". The different cues contributing to this percept were separated by varying the orientation of the subject and the orientation of the visual background relative to gravity. We also measured the effect of decreasing or increasing gravity by making these shape judgements throughout all the phases of parabolic flight (0 g, 2 g and 1 g during level flight). The perceived up direction was modeled by a simple vector sum of "up" defined by vision, the body and gravity. In this model, the weighting of the visual cue became negligible under microgravity and hypergravity conditions.     

On the existence and stability of liquid water on the surface of mars today

The recent discovery of high concentrations of hydrogen just below the surface of Mars' polar regions by Mars Odyssey has enlivened the debate about past or present life on Mars. The prevailing assumption prior to the discovery was that the liquid water essential for its existence is absent. That assumption was based largely on the calculation of heat and mass transfer coefficients or theoretical climate models. This research uses an experimental approach to determine the feasibility of liquid water under martian conditions, setting the stage for a more empirical approach to the question of life on Mars. Experiments were conducted in three parts: Liquid water's existence was confirmed by droplets observed under martian conditions in part 1; the evolution of frost melting on the surface of various rocks under martian conditions was observed in part 2; and the evaporation rate of water in Petri dishes under Mars-like conditions was determined and compared with the theoretical predictions of various investigators in part 3. The results led to the conclusion that liquid water can be stable for extended periods of time on the martian surface under present-day conditions.     

脊波号的MFIE分析和设计

本文提出了运用磁场积分方程（ＭＦＩＥ）来分析和设计脊波导的一种统一方法。ＭＦＩＥ方法借助于脉冲基函数的简单数字提供了精确完全的解。本文的重点是针对应用于微波部件和系统的脊波导的设计，而不是数值算法的细节。在以前的著作中由于忽略ＴＥ１１模而造成的错误的带宽估值得到了校正；并且提供了有关截止频率，带宽，衰减和波导阻抗的不同的有用设计曲线，根据同正确的闭式解以及其它已发表的结果的比较，说明所提出的理论是