IL-E2线阵遥感相机的研制和TDI分析

针对低照度、高速物体测量等应用场合,介绍了一款高灵敏度的线阵相机的研制方案,相机的线阵CCD芯片采用DALSA公司的IL-E2 ,它具有96级TDI功能,灵敏度比一般的线阵CCD相机提高了约20倍,大幅度提高了相机的整体响应水平,通过试验,得出结论,TDI性能的良好发挥必需依靠图像与TDI数据流精确的同步,即使10%的失步也会造成相机灵敏度的严重退化,因此在精确控制像速度的情况下,更适合作为一款遥感相机来使用.     

基于ADAMS/Aircraft的起落架滑跑模型仿真

以小车式起落架为例,利用ADAMS/Airc- raft建立了起落架滑跑试验仿真模型.给出了起落架滑跑运动方程,并进行了滑跑试验仿真分析。仿真结果与理论要求对比具有较好的一致性。     

专科英语、本科英语及成人专科英语的定位和相互关系

专科英语在理论上被界定为专门用途英语(ESP)分支下,介于学术英语(EAP)与职业英语(EOP)之间的业务用途英语(EPP)。而本科(大学)英语在理论体系上属于普通英语(GE)。本文从ESP理论的角度探讨了专科英语,本科英语及成人专科英语的定位和相互关系。     

薄膜充气管充气展开特性试验

用展开导轨消除因重力产生的摩擦力,在不同充气速率与初始展开角条件下对薄膜材料充气管的充气展开特性进行了试验研究,获得了展开角,以及展开加速度和内气压的变化规律。试验及分析结果表明:充气管的充气膨胀与展开相互独立,充气膨胀过程近似为等压增容过程,折叠部位的气压变化特性与整体气压变化特性差异明显。     

双主动交会远程导引方案建模与仿真

针对航天器双主动交会问题,以两航天器能量消耗之和最小为最优交会指标,建立了一种寻求远程导引可行飞行方案的算法模型,以满足远程导引对测控、日照和任务时间等要求。仿真结果表明,该算法可行。     

MAGNETOSPHERIC PHYSICS IN CHINA:2000-2002

This brief report presents the latest advances of the magnetospheric physics researches in China during the period of 2000-2002, made independently by Chinese space physicists and through international cooperation. The related areas cover almost every aspect of magnetospheric physics.     

新型精密狭缝的设计

介绍了一种基于弹性铰链的精密狭缝的设计，加工工艺要求和性能测试结果。根据实际需要，狭缝可以采用水冷结构。     

加入世界贸易组织我国汽车工业应采取的对策

概述了我国加入世界贸易组织后将给我国汽车工业带来的积极影响，以及由此而要面临的严峻形势。对此，提出了我国汽车行业应采取的对策和所应持的态度。     

Stability of resonance rotation of a satellite with respect to its center of mass in the orbit plane

The stability of resonance oscillations and rotations of a satellite in the plane of its orbit in the case when the difference of the moments of inertia with respect to the principal axes lying in the orbit plane is small is determined at a given rotation number m by the sign of function Φ_m(e), introduced by F.L. Chernous’ko in 1963. In this paper, convenient analytical representations of functions Φ_m(e) are described in the form of integrals and series of Bessel functions regular at e → 1^?. Values of Φ_m(1) are calculated in explicit form. A theorem about the double asymptotic form of functions Φ_m(e) at m → ∞ and e → 1^? is proved by the saddlepoint method.     

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with primary goat embryonic fibroblast showed no difference from traditional feederlayer-based culture method used in mouse and human. The putative primary EG colonies were multilayer clumps ofcompact cel