基于Linux的触摸屏设备驱动的设计

以三星公司的S3C2440A处理器为平台，介绍了linux操作系统下四线电阻触摸屏的驱动程序的设计开发过程，详细阐述了触摸屏设备驱动程序的设计过程，并将设计好的驱动程序注册到linux内核中。最后将触摸屏设备驱动程序加入到linux内核中编译成内核映像，并烧写到S3C2410A处理器中测试该驱动程序。     

T cell regulation in microgravity – The current knowledge from in vitro experiments conducted in space,parabolic flights and ground-based facilities

Dating back to the Apollo and Skylab missions, it has been reported that astronauts suffered from bacterial and viral infections during space flight or after returning to Earth. Blood analyses revealed strongly reduced capability of human lymphocytes to become active upon mitogenic stimulation. Since then, a large number of in vitro studies on human immune cells have been conducted in space, in parabolic flights, and in ground-based facilities. It became obvious that microgravity affects cell morphology and important cellular functions. Observed changes include cell proliferation, the cytoskeleton, signal transduction and gene expression. This review gives an overview of the current knowledge of T cell regulation under altered gravity conditions obtained by in vitro studies with special emphasis on the cell culture conditions used. We propose that future in vitro experiments should follow rigorous standardized cell culture conditions, which allows better comparison of the results obtained in different flight- and ground-based experiment platforms.     

飞机燃油系统地面模拟试验干扰的产生和处理

分析燃油地面模拟试验台测控系统在调试过程中模拟量输出信号出现大幅度波动的原因,介绍其处理过程及实际效果,指出在试验中应采取的措施。     

Upwards migration phenomenon on molten lunar regolith: New challenges and prospects for ISRU

As part of our research on the feasibility of producing commodities from lunar regolith by thermal-driven processes with minimal terrestrial precursors we need to characterize, reproduce, and understand thermophysical properties of the molten regolith still unforeseen under the lunar vacuum conditions at a scalable sample size. Two unanticipated phenomena, apparently caused by lunar melt’s surface tension under vacuum, have been revealed in our research work, vacuum void formation and upwards migration. In this paper we present our findings and thinkable explanation on the upwards migration phenomenon experimentally observed and consistently replicated as JSC-1A lunar regolith simulant melted at high vacuum. Upwards migration of molten lunar regolith will make future lunar ISRU’s melting processes both challenging as molten bulk material would migrate upwards along the container’s walls, and also promising on new opportunities for alternative ISRU’s sustainable processes as regolith’s upwards migration takes place in uniformed thin-film pattern. Among the potential ISRU’s processes that might use controlled thermal thin-film-based migration without the necessity of terrestrial precursors are production of feedstock for 3D printing, fractional separation of regolith’s component’s (O₂, metals, and alloys) via pyrolysis, film coating, purification of valuables solid crystals including silicon, and fabrication of key elements for microfluidic, and MEMS devices. Thermal upwards migration phenomenon on JSC-1A’s melt is formulated and explained by the authors as due to thermal Marangoni effect (also known as thermo-capillarity) in which temperature gradients within the melt’s bulk and along the crucible’s wall yield the surface tension large enough to supersede the gravitational force and yield the experimentally observed upwards thin-film migration. As far as the authors know, upwards thermal migration of molten JSC-1A (or other lunar simulant regolith) under vacuum has not been reported in the literature. A thermal mathematical model accounting for thermal Marangoni effect on molten JSC-1A agrees with what experimentally was observed, the formation of the meniscus on the melt-wall surface interface along with an incipient upwards migration in thin-film pattern along the crucible wall that, according to the model, experiences large temperature gradient, an important factor to trigger the thermal Marangoni effect along with the fact that surface tension of the molten lunar regolith material is temperature dependent.     

一种基于改进A*算法的三维航迹规划方法

采用了一种改进的网格A*算法进行了飞行器的三维航迹规划。将启发函数中的直线距离替换为折距,对其进行了改进。改进后的启发函数有效地减少了规划过程中扩展的节点数,从而减少了搜索时间,并且扩展节点时,只选择满足飞行器的飞行性能约束的邻点,减小了搜索空间。仿真结果表明,应用该规划方法,飞行器能够进行在线实时三维航迹规划。     

某类任务的无人作战飞机航路规划

讨论了对于包含了既是威胁又有价值的节点的任务模型,无人作战飞机航路规划问题解决的思路和关键环节,并构建了数学模型,然后应用A*启发算法求解各个目标点的最优航路,并依据作战指挥人员对作战方案的总体把握给出的权衡因子,计算每个目标点取得的费效比,确定满足一定条件下最先攻击目标.实例仿真表明该方法可以有效地解决这类任务的航路规划问题.     

复杂环境下的A/C模式信号处理算法及其实现

本文基于软件无线电的思想,提出一种复杂环境下的A/C模式信号处理算法,该算法从脉冲识别,A/C模式框架判决以及信息代码提取三个方面进行了研究,在识别多目标混叠、拒绝目标幻影,避免异步串扰方面,达到了较好的效果,并在FPGA上实现了该算法.     

基于DSP的片外FLASH自举引导的实现

利用多通道缓冲串口McBSPO实现了TMS320VC5509A DSP与外部串行Flash的自举引导,完成了用DSP控制Flash进行在线系统编程,重点介绍了DSP与Flash接口电路的设计,同时对Flash的烧录过程及软件编程部分进行了详细说明.通过在实际工程中的应用验证,表明了该方案切实可行.     

基于GJB289A标准的通用总线数据分析

基于GJB289A总线标准协议,采用先进的数据分析解算算法,对总线记录仪记录的总线数据文件进行分析,系统支持多粒度、多种方式的数据分析和显示功能。系统与ICD采用自动对接,针对不同型号提供统一的分析接口;采用C/S模式的系统结构,既满足多用户同时使用,又满足不同型号同时在线分析,真正实现了系统的通用性。     

“实践九号”A卫星光学遥感图像杂散光噪声去除

杂散光是影响卫星光学遥感图像像质的重要因素,严重时会在图像上形成明暗的杂散光条纹噪声,降低图像的对比度和清晰度。文章针对“实践九号”A（SJ-9A）卫星光学遥感图像存在的杂散光噪声现象,设计了一种基于成像载荷焦面入射杂散光空间分布特征的遥感图像杂散光条纹噪声去除方法,通过测量杂散光在推扫遥感图像上的空间分布特征,建立杂散光分布特征模型,采用分块自适应算法进行杂散光噪声滤波,消除SJ-9A遥感图像上随时空变化的杂散光条纹噪声。杂散光噪声去除后图像整体色调均匀,无条带噪声,满足CCD/TDI-CCD推扫遥感图像辐射校正精度（广义噪声）优于5%的指标要求。