运载火箭大容量CPCI集成数据采集与测试系统设计

介绍了一种用于运载火箭测试的CPCI数据采集系统设计方案,该测试系统针对某运载火箭测试需求,从顶层设计出发,以龙芯2F处理器为基础平台,对测试系统组成构架、硬件平台设计和软件系统设计等各个层面进行了优化设计,该系统实现了高流量、高速度的多种信号连续采集处理和发送,测试系统具有体积小、集成度高、可扩展和便于维修的特点.     

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.     

配对进近模式分析及研究进展

配对进近模式是在近距平行跑道上运行的,旨在提高仪表气象条件下的进场效率的一种高效进近模 式,该模式的完整流程在国内鲜有阐述。本文重点分析配对进近程序在近距平行跑道上运行时各阶段的流程, 以及配对进近程序的实施对机型、设备以及人员的具体要求;结合目前国内近距平行跑道的运行情况,国际上 对配对进近模式的研究和应用现状,指出我国引进配对进近模式的迫切性以及该模式今后的研究和发展趋势。     

RS码的时域编码频域译码技术

通过对于RS码的时域编码／频域译码的算法进行分析,找到了它们的不同之处及转换方法,得出了时域编码／频域译码的混合编译码方法,提高了运算速度和纠错能力。     

基于激光扫描技术的大型船舶舱容量计量技术研究

介绍了一种应用三维激光扫描技术,采集获取船舱三维点云数据,对点云数据进行配准、修补,完成船舱内部构件精细建模,快速高精度的重建大型船舱三维模型,实现大型船舱容量快速计算的方法。运用三维激光扫描技术完成158000吨大型油轮液货舱容量计量,通过与传统容量计量方法进行比对分析,解决了单点数据采集模式弊端,达到了大型船舶舱容量快速、精准计量效果。     

Cubesats: Cost-effective science and technology platforms for emerging and developing nations

The development, operation, and analysis of data from cubesats can promote science education and spur technology utilization in emerging and developing nations. This platform offers uniquely low construction and launch costs together with a comparative ubiquity of launch providers; factors that have led more than 80 universities and several emerging nations to develop programs in this field. Their small size and weight enables cubesats to “piggyback” on rocket launches and accompany orbiters travelling to Moon and Mars. It is envisaged that constellations of cubesats will be used for larger science missions. We present a brief history, technology overview, and summary of applications in science and industry for these small satellites. Cubesat technical success stories are offered along with a summary of pitfalls and challenges encountered in both developed and emerging nations. A discussion of economic and public policy issues aims to facilitate the decision-making process for those considering utilization of this unique technology.     

Capacity building in space law and space policy

A high level of expertise in space policy and law is required to initiate and keep pace with the expansion of space activities, including those undertaken by the private space industry. Space activities generally refer to those undertakings that are carried out with the use of several technologies for the exploration and utilization of outer space often for scientific, military, economic and social proposes within international and national policy and regulatory frameworks. Space policies and legal regimes determine the scope, nature, pace, possibility and development of space undertakings. Therefore, appropriate space policies and regulatory regimes, both at the international and national levels, are indispensable for the initiation, operation and enhancement of space activities. There are various regulatory models and approaches for regulating space activities, and for building capacity in space law and space policy. It is imperative to have the appropriate human resources and capabilities in the development and implementation of space policies and space legal regimes. This crucial requirement has been well recognized in the more advanced space-faring nations, but not to the same level in other space-faring or space-aspiring nations.     

Improving space knowledge in Africa: The ARCSSTE-E

The African Regional Centre for Space Science and Technology Education in English (ARCSSTE-E) was inaugurated in November 1998, with a mandate for the development of indigenous skills, knowledge and capacity, through rigorous theory, research, applications, field exercises and pilot projects that can enhance socioeconomic development. The institution runs a nine-month Postgraduate Diploma (PGD) programme in the areas of Remote Sensing and Geographic Information Systems (RS/GIS); Satellite Communications; Satellite Meteorology and Global Climate; and Basic Space Science and Atmospheric Physics (BSS), as well as short courses and outreach programmes. This paper describes the impact of the space postgraduate diploma programmes in the African region, highlighting the capabilities of the centre. Using a survey of participants in its courses, it notes where changes are needed and makes recommendations to this end.     

立式金属罐容量变形分析及有限元计算

在深入研究立式罐结构特点的基础上,将罐体划分为若干类型,运用有限元模拟计算的方法对罐体在液态介质装载过程中的受力响应情况进行了分析.根据容量计量技术原理,计算了罐体因受力变形而形成的容量数值变化,并识别了其中较为重要的影响因素.通过现场试验验证的方法证明了分析及计算结果的准确性.提出在进行容量计量工作时,应充分考虑罐体...     

Gender diversity in geo-spatial technology and applications disciplines uptake in developing Asian countries – A survey-based competency analysis

Geo-Spatial Technology and Applications (GSTA) contributes significantly to the implementation of the UN 2030 Agenda for Sustainable Development, which seeks to ‘leave no one behind’. This study attempts to assess the gender diversity in enrolment in GSTA programmes in developing countries in Asia using data available with the UN-affiliated Regional Centre in India. A survey was also conducted to gauge trainees’ comfort in a complex multi-cultural, multi-linguistic classroom environment. The analysis shows that female participation in short-term courses has been increasing rather steeply over the years (1995–2019). The enrolment has reached 30% in recent years. It is also observed that the female participants have preferred (about 10%) to enrol in physical Science and Technology (ST) -oriented courses such as Remote Sensing and GIS, Satellite Meteorology and Climate Change, and Space and Atmospheric Sciences when compared to electrical Engineering and Technology-oriented Satellite Communications and Global Navigation Satellite Systems courses that would require a strong knowledge of digital signals and systems theory.The survey study with a participation of 150 trainees from 17 countries shows that women trainees have a slight edge by 9% over the male counterparts in learning ST elements of the courses. At sub-regional levels, it is observed that participants from Indian sub-continent countries (ISC) are better by 15% than participants from South-east Asian Countries (SAC) and Central Asian Countries (CAC). As far as the course structure perspective is concerned, there has been a significant difference with 70% of the ISC trainees have found the courses as well-balanced covering equally both technology and applications, while only 36% and 56% of the trainees from SAC and CAC, respectively, have found the course as balanced. Importantly, the survey has revealed that the participants from SAC and CAC have a big challenge in apprehending lectures in English, as reflected by their top scores at 18% and 17%, respectively, compared with the corresponding value of the ISC trainees being 72%. Recommendations are suggested to sustain the female enrolment in long-term GSTA training programmes. Strategies that create family-friendly learning conditions, including joint education programmes involving lead institutions of the participants’ countries, are proposed to facilitate higher female participation. Furthermore, measures such as standardisation of curricula regionally at undergraduate levels and having periodic meetings of trainers are recommended in order to minimise the trainees’ core competency gaps in GSTA disciplines at the regional level.