Prioritizing scientific exploration: A comparison of the ethical justifications for space development and for space science

I argue that the moral justification for space science is more compelling than the moral justification for space development. Thus, we ought to reemphasize the status of science as a major stakeholder in space, especially when entertaining policies which might encourage the kinds of space development activities (e.g. resource exploitation) that are liable to conflict with the scientific uses of space.     

外语教学中情商的培养与发展

情感智商，简称情商，对语言学习的过程与结果有直接影响。21世纪是一个综合国力与高素质人才相互竞争的时代，英语教学的质量面临着挑战，把EQ理论引入英语教学实践对提高英语教学质量具有现实意义。在英语课堂教学中只有了解、重视和培养学生的情商，才能真正做到因材施教，把握信息输入与输出的最佳时机，同时帮助学生摒弃不良的学习情绪，调整学习方法以形成良好的学习习惯。     

可持续发展经济理论剖析

可持续发展由思想到理论再到实践，需要多代人的不懈努力。笔者对可持续发展的概念及内涵进行了界定，并对可持续发展经济理论的主要内容进行了剖析。     

End-to-end validation process for the INTA-Nanosat-1B Attitude Control System

This paper describes the end-to-end validation process for the Attitude Control Subsystem (ACS) of the satellite INTA-NanoSat-1B (NS-1B). This satellite was launched on July 2009 and it has been fully operative since then. The development of its ACS modules required an exhaustive integration and a system-level validation program. Some of the tests were centred on the validation of the drivers of sensors and actuators and were carried out over the flying model of the satellite. Others, more complex, constituted end-to-end tests where the concurrency of modules, the real-time control requirements and even the well-formedness of the telemetry data were verified. This work presents an incremental and highly automatised way for performing the ACS validation program based on two development suites and an end-to-end validation environment. The validation environment combines a Flat Satellite (FlatSat) configuration and a real-time emulator working in closed-loop. The FlatSat is built using the NS-1B Qualification Model (QM) hardware and it can run a complete version of the on-board software with the ACS modules fully integrated. The real-time emulator, running on an industrial PC, samples the actuation signals and emulates the sensors signals to close the control loop with the FlatSat. This validation environment constitutes a low-cost alternative to the classical three axes tilt table, with the advantage of being easily configured for working under specific orbit conditions, in accordance with any of the selected tests. The approach has been successfully applied to the NS-1B in order to verify different ACS modes under multiple orbit scenarios, providing an exhaustive coverage and reducing the risk of eventual errors during the satellite's lifetime. The strategy was applied also during the validation of the maintenance and reconfiguration procedures required once the satellite was launched. This paper describes in detail the complete ACS validation process that was performed and it shows the most relevant errors detected and fixed during testing. Finally it summarises some of the most significant conclusions.     

如何实施产品研制过程的计量评审

按照国家标准ＧＢ／Ｔ１９０２２．１（ＩＳＯ１００１２－１）《测量设备的计量确认体系》的要求，就如何开展产品研制过程的计量评审工作，提供了一种具有可操作性的方法，可供产品研制单位制定计量评审程序时参考。     

空间电推进应用及技术发展趋势

充分调研分析了国外空间电推进技术及典型应用情况,详细介绍了电推进在GEO卫星位置保持和轨道转移、深空探测主推进、中低轨道航天器无拖曳控制与高精度姿态控制、空间太阳能电站轨道维持等领域的空间应用情况。对电推进在国内不同领域的应用需求进行了分析,包括GEO卫星位置保持和全电推进、近地小行星探测等深空探测主推进、低轨航天器无拖曳控制和轨道维持、(超)低轨小卫星编队飞行及(微)小卫星精确轨道控制和空间太阳能电站轨道维持等任务。电推进技术正朝着高功率、大推力、低功率、微小推力、宽功率范围推力连续可调、高比冲、长寿命和多模式方向发展。针对电推进在不同应用领域的需求及电推进技术发展方向,提出了我国未来20年拟开展的电推进技术研究项目。     

空间信息对抗装备体系研究

空间信息对抗装备体系是完成空间信息对抗作战任务的所有对抗装备及系统的总称,即在空间信息对抗战场中所能够使用的一切装备,涵盖外层空间、空中、地面、海上以及整个信息网络。利用系统分析的方法,在详细分析空间信息对抗作战特点和作战原则的基础上,重点开展了空间信息对抗装备体系的构成及各部分作战性能研究,建立了空间信息对抗装备体系组成框架,并分析了空间信息对抗武器装备发展趋势。     

基于模型的系统工程在航天器研制中的研究与实践

针对基于文档的传统航天器研制模式,存在着信息表示不准确、信息查找/更改困难等不足,指出基于模型的系统工程(MBSE)是解决这些问题的有效途径。根据MBSE的定义,分析其内涵;在继承国外实践成果的基础上,在航天器研制过程中进一步创新MBSE的理论,并应用MBSE理论指导航天器研制,以推动系统工程理论和实践的发展。     

高职院校ESP教师的角色定位与个体发展研究

以Freeman的语言教师学习理论和Dudley—Evans＆St．John的角色理论为指导,以三所高职院校的ESP教师和部分学生为调查对象,通过问卷调查、个体访谈等研究工具探讨ESP教师在角色定位方面的偏差和个体发展方面的不足,并提出促进个体发展的措施。     

亚洲10大枢纽机场运营绩效预测研究

提高机场未来运营绩效是可持续发展的关键,对其进行准确预测是改善机场运营绩效的基础。考虑到突发事件的影响,单纯定量预测存在预测失真问题,本文采用定性定量结合分析法预测亚洲 10 大枢纽机场“十四五”期间的运营绩效,对比灰色模型定量分析法和 ARIMA 模型的预测结果,并对机场运营绩效预测结果进行分析。结果表明：灰色模型定量分析法比 ARIMA 模型更适合预测机场运营绩效;与实际统计值相比,灰色模型预测的误差都小于 4%,预测精度较好;采用定性定量结合分析法得到了机场未来运营绩效预测的结果,比单纯定量预测更符合实际情况。