关于MIL—STD2164中的无故障检验时间确定公式的讨论

本文给出了环境应力筛选无故障检验通过概率公式,讨论了检验窗的概念及其应用。     

某单自由度陀螺仪测量不确定度的评定与表示

本文通过对陀螺仪八位置测试数学模型和不确定度传播律的分析计算,对陀螺仪八位置测试数值进行了A类标准不确定度评估,对由于测试所用测试设备和测试方法导致的B类标准不确定度进行评估,并对A类和B类评估进行了合成,得到了合成标准不确定度和扩展不确定度。并进行了举例计算。     

高精度数字温度计替代标准水银温度计的探讨

用基于工业铂电阻的高精度数字温度计替代标准水银温度计，是当今温度计量的一个研究热点。迄今为止这类产品只能作为工作器具使用，其主要原因是对高精度数字温度计的长期稳定性研究还不充分。介绍了一款高精度数字温度计长达8年的稳定性研究成果，并和标准水银温度计比较，说明用高精度数字温度计替代标准水银温度计是完全可行的观点，同时提出一些具体建议。     

支撑产品线统标统型的研发模式创新与实践研究

针对航空电子研发企业产品型谱不收敛、新技术应用风险高等问题和挑战，提出了一种用于支撑产品线统标统型的新型研发模式，通过构建支撑产品线统标统型的产品技术研发体系，推进平台CBB在产品线各层级中的广泛共享复用，实现产品的通用化、系列化、组合化研制。实践结果表明，该研发模式可有效促进企业研发成本、质量、进度的有机统一。     

基于Arinc661的CDS标准部件库的设计与实现

本文提出了一种Arinc 661规范的解决方案,它采用VapsXT为工具,针对座舱显示应用,设计并实现了一个符合规范的座舱显示系统标准部件库框架,为研发航电显示产品提供了更为便利的平台.实验结果表明,通过本文提出的座舱显示系统内核标准部件库框架,可以方便地对部件库进行扩展.     

基于概率最近邻域算法的分布式多传感器多目标跟踪算法

为进一步扩大分布式多传感器的应用范围,基于概率最近邻域思想,研究了分布式多传感器概率最近邻域算法,并对其与分布式多传感器联合概率数据互联算法进行了性能仿真分析。经仿真验证,分布式多传感器概率最近邻域算法能够解决多传感器多目标跟踪问题,且实时性有较大提高。     

Space law education in China: Status quo,shortcomings and possible ways out

Space law education has an essential role in the space capacity building of a country because of its importance for human resources development in space law. Comparisons between Canada and China, the European Union and China and the United States of America (USA) and China in space law degree education, course, teaching methodology, institute and practice and communication platform are provided in an attempt to review some issues which exist within the Chinese space law educational system and to seek a better choice for China’s space law education reform. Chinese space law education has achieved noticeable progress over the past two decades. However, it is still limited in comparison to its counterparts in Europe and Northern America. The range of the space law degree education programmes and space-law-related courses is comparatively limited. A gap remains between space law education and practice in China. Chinese space law classes are still dominated by the teacher-centred teaching methodology, although several universities have some new teaching practices. The establishment of seven space law-related research institutes plays an increasingly important role in Chinese space law education, space law and policy research and legal advisory services for the Chinese government and non-governmental sectors. However, these institutes still have a long way to go in comparison with their counterparts in Europe and Northern America. While China has established domestic research platforms for space law communication through international cooperation, it does not provide space law practice platforms for space law education. While international space law does not provide a direct legal foundation for space law education in China, Chinese educational laws can lay a profound legal foundation for Chinese space law education. To promote its national expertise and capacity in space law, based on the three-pillar model and the experiences of its counterparts in North America and Europe, China should adopt a systematic and sustainable regime for its space law education.     

Hardware qualification for scientific ballooning missions

The European Stratospheric Balloon Observatory (ESBO) initiative aims at simplifying the access to stratospheric balloon missions. We plan to provide platforms and support with instrument design in order to support scientists. During the design process, the inevitable question of qualification for the harsh flight conditions arises. Unfortunately, there is no existing standard for qualification of stratospheric ballooning hardware. Thus, we developed a qualification procedure for use within ESBO and similar projects.In this paper, we present our analysis of the environmental conditions in the stratosphere. While conditions at typical balloon float altitudes are similar to the space environment, there are also some relevant differences. For example, the thermal environment is dominated by radiation and thermal conduction, but the remaining atmosphere still supports a certain amount of convection. The remaining atmospheric pressure in the stratosphere also leads to reduced arcing distances. Vibrational loads are far less than for space missions, but quasi-static or shock loads may occur. The criticality of radiation increases with mission duration.Based on the environmental conditions, we present the qualification procedures for ESBO, which are based on the European Cooperation for Space Standardization (ECSS) standards for space systems. Overtesting against too high requirements leads to overengineering, driving mission cost and mitigating the advantages of balloons over space missions. Therefore, we modified the ECSS standards to fit typical scientific ballooning missions over several days at altitudes up to 40 km. Furthermore, we analyzed design rules for space systems with regard to their relevance for scientific ballooning, including material and component selection. We present the experience from the hardware qualification process for the ESBO prototype STUDIO (Stratospheric UV Demonstrator of an Imaging Observatory). Even though boundary conditions are different for each individual mission, we aimed for a broader approach: We investigated more general requirements for scientific ballooning missions to support future flights.     

时间基准的现在和未来

介绍了时间基准、时间系统的基本内涵及常用类型，阐述了当前时间基准的理论定义、计量定义、物理实现。分析评估了时间基准未来可能的发展变化，特别是对光钟的影响、秒定义的变化、闰秒的变化等进行了详细分析。考虑到我国实际情况，从基础研究、技术试验和体系应用的角度给出了关于时间基准的一些思考和建议。