In Memoriam: Herbert L. Pick,Jr. (1930–2012)

ABSTRACT

Fictive motion in language (as in “the ridge went north”) is claimed to reflect the attention focus of the observer on the extension and spatial layout of an entity. This paper investigates fictive motion in alpine narratives, which describe the experience of moving in a very specifically structured space. We examine space properties that are highlighted through fictive motion in this specific context and describe how they go beyond spatial extension. We further report the communicative motivation behind the use of fictive motion, ranging from conveying the sense of place to encoding the full spatial footprint of a motion event.     

The role of space related non-governmental organizations (NGOs) in capacity building

Non-governmental organizations (NGOs) play a unique role in international affairs, providing access to resources, expertise, and assistance to supplement State resources. Sometimes the diplomatic skills and unofficial access of NGOs to policymakers through Track Two diplomacy can move a previously stalled critical issue forward and assist policymakers from different countries to find common ground outside official channels. Because they work outside of official channels, they are not bound by State policy that may inhibit negotiations between States. Some also have a convening power that sometimes makes it possible for State representatives to meet discipline experts and each other for informal discussions on issues of mutual interest. Finally, NGOs can draw attention to issues that may be overlooked or avoided by State organizations.     

航天飞机简化模型流场测量

叙述航天飞机简化模型流场测量与观察，进行了旋涡场测量，机身压力分布测量和组合体的油流观察。试验Ｍ数为０．４，０．６，０．８，１．５，攻角为０°，６°，８°，１０°，１２°，１５°，１７°和２０°。分析三种方法所得结果，符合得很好     

Cutting the bread

Why the draft Treaty on the Prevention of the Placement of Weapons in Outer Space, the Threat or Use of Force Against Outer Space Objects (PPWT) will not work - whereas the Code of Conduct for Outer Space Activities may.     

全站仪检测数据管理系统

介绍了全站仪检测数据管理系统。本系统以FoxPro for Windows为基础，采用模块结构，具有对检测数据录入修改，自动转换，成果计算，查询显示等功能，实现了系统数据管理和处理的一体化。     

Hilbert空间中严格伪压缩映像的强收敛定理

给出了一种求解严格伪压缩非自身映像不动点集上变分不等式的迭代算法，并证明了其强收敛性。此结果推广了姚永红和T．H．Kim等的研究结果。最后，进一步将结论推广到求解有限个严格伪压缩非自身映像公共不动点集上的变分不等式。     

内外分区空间统一精度场建立方法研究

针对内外分区空间内结构和设备安装的数字化测量需求,研究内外参考点之间的关联技术,构建与外测量精度场相统一的内测量精度场。对于内外空间不同的开口数,利用多测点定位法、二测点和水平仪单站位定位法、二测点和水平仪双站位定位法等方法建立内精度场,实现与外精度场的统一。以某型设备为例进行试验表明,利用内外精度场测量同一检测点进行比较,测量的最大不一致误差为0.14 mm,证明构建模式可行、简单、可靠。     

Shock protection of penetrator-based instrumentation via a sublimation approach

It is often necessary for space-borne instrumentation to cope with substantial levels of shock acceleration both in the initial launch phase, as well as during entry, descent and landing in the case of planetary exploration. Current plans for a new generation of penetrator-based space missions will subject the associated on-board instrumentation to far greater levels of shock, and ways must therefore be found to either ruggedize or else protect any sensitive components during the impact phase. In this paper, we present an innovative method of shock protection that is suited for use in a number of planetary environments, based upon the temporary encapsulation of said components within a waxy solid which may then be sublimated to return the instrument back to its normal operation. We have tested this method experimentally using micromachined silicon suspensions under applied shock loads of up to 15,000g, and found that these were able to survive without incurring damage. Furthermore, quality factor measurements undertaken on these suspensions indicate that their mechanical performance remains unaffected by the encapsulation and subsequent sublimation process.     

小行星探测科学目标进展与展望

由于较好地保留了太阳系早期形成和演化历史的遗迹,小行星,尤其是近地小行星,已成为国际深空探测领域的研究热点。介绍了小行星的定义、分类和主要探测方式,指出目前小行星探测已进入空间探测的新时代;总结了国际小行星探测的现状,包括已实施和正在实施的小行星探测任务的科学目标、科学载荷配置,以及获取的主要科学数据等;探讨了未来小行星探测的发展趋势和主要科学问题,并对我国未来自主小行星探测任务科学目标的制定进行了展望。     

2 AU以内的“渐进型”太阳高能粒子事件模拟

太阳高能粒子（Solar Energetic Particle,SEP）事件是影响地球空间以及深空辐射环境的主要因素之一。“渐进型”太阳高能粒子事件中的高能粒子主要来自于日冕物质抛射（Coronal Mass Ejection,CME）所驱动的激波扩散加速（Diffusive Shock Acceleration,DSA）过程。CME驱动的激波在行星际的传播过程中,其结构不断演化,进而影响到高能粒子的加速过程。本文利用二维太阳高能粒子加速和传播模型,对发生于2014年4月18日的太阳高能粒子事件实例进行了数值模拟。模型考察了黄道面上2 AU的距离以内包含地球所在位置的4个不同点,分别计算了每个点上高能粒子的通量。数值模拟的结果表明：黄道面内不同位置的观察点,与激波波前的磁力线连接不同,从而导致观察点处高能粒子的通量有着显著的差异。该模型的计算结果可以为深空探测计划开展辐射环境研究提供必要的输入。