光电指向器水平度测量算法

通过对光电跟踪仪安装时水平度调整方法的研究,提出了利用坐标变换算法,用以实现光电跟踪仪安装时水平度的快速调整.利用该算法不但可以减少安装时的测量次数,节约安装调整时间,而且提高了设备安装时的测量精度,具有广泛的推广应用价值.文中还对该方法的测量计算误差进行了分析.     

基于时频原子分解的地雷目标特征提取及分类

利用车载超宽带地表穿透雷达进行大区域地雷探测在军事领域上有重要的应用价值,能否提取稳定一致的地雷特征是其实用化的关键.提出一种基于时频原子分解的地雷目标特征提取和分类方法,该方法以地雷目标的四维散射函数为基础获取二维时频图像,在对时频图像详细分析的基础上,通过时频原子对地雷目标一维距离向剖面进行分解,得到能够完整描述地雷时频域特征的多个原子,将这些原子作为特征向量送入分层分类器.通过实测数据验证,该方法适用于车载超宽带地表穿透雷达探测地雷.同传统基于时域或频域的特征提取算法相比,该方法提取的特征更加稳定,能有效改善地雷探测性能.     

An historical review of US defense strategy from Vietnam to operation Iraqi freedom

Facing nearly half a billion dollars in spending cuts over the next five years, US defense planners and strategists must simultaneously rebuild a war-weary Army weakened from over a decade of war, build new sea and air capabilities for the Pacific theater, and reduce manpower, procurement, and contractor budgets while promoting innovation. The US defense department is embarking on what may be the most sweeping period of defense transformation in recent memory. This article reviews the history of American defense transformation, focusing on an important but largely overlooked period of military innovation that began in the shadow of Vietnam and ended with troops fighting through blinding sandstorms at night on the road to Baghdad. The multifaceted transformation strategy conceived in the 1970s paved the way for a military revolution in the 1990s and enabled unprecedented battlefield adaptation in the 2000s. After reviewing the revolutionary changes that led to American dominance in conventional warfare in the 1990s, the article examines US transformation policies in the 2000s to inform defense strategy and planning efforts in the 2010s.     

Penning阱中离子谱探测灵敏度与LC谐振回路Q值关系的实验研究

介绍了Penning阱存储离子的探测原理以及离子谱的探测灵敏度与品质因数的关系理论分析结果。在实验中考虑到存在最小阈值的情况下对得到的离子谱进行分析,结果表明：离子谱探测灵敏度与谐振回路Q值的平方成正比关系。     

九年一贯制学校综合实践活动课程实施现状分析及价值挖掘

综合实践活动课程作为现代教育的重要内容,是国家新一轮课改的亮点和难点。调研发现,九年一贯制学校开设综合实践活动课程推动了学校重构教育教学层级与体系,能有效提升学生核心素养,促进教师职业成长与转型,帮助学校竖立校本特色与教育品牌影响力。九年一贯制学校开设综合实践活动是人才强国背景下的学生需求与文化适应的统一,是教师的使命和责任的体现,是传统教育与新型教育的融合与创新。