网络环境下高校图书馆如何加强馆藏资源建设

根据网络环境给高校图书馆献信息资源建设工作带来的挑战，从印刷型纸质献建设、电子献资源建设、网络信息资源建设、信息资源的共享共建等方面论述了高校图书馆如何加强信息资源建设。     

肼类燃料蒸汽污染控制技术

针对肼类燃料在使用中产生的蒸汽会对大气造成污染这一问题 ,介绍了肼类推进剂气体污染控制方法。这些方法主要有洗涤吸收法、气体扩散法、焚烧法、活性炭吸附法、催化法、喷雾法、冷却法、泡沫覆盖法、固体粉末消污法等。论述了国内外肼类气体污染控制的各种技术 ,并对各种技术特点进行了对比与分析     

星载铷原子频标的可靠性强化试验

针对影响星载铷原子频标可靠性的环境因素进行了分析,确定了影响星载铷原子频标可靠性的主要环境敏感应力,根据可靠性强化试验理论和星载铷原子频标的技术特点,设计了可靠性强化试验方案。依据此方案对新研制的某型星载铷原子频标工程样机实施了可靠性强化试验。试验结果表明,该方案对确定该型号铷原子频标样机工作极限、激发其潜在缺陷,均有较好的效果,从而为实现星载铷原子频标的可靠性增长提供了新的思路。同时本研究对同类高可靠航天产品的可靠性增长可提供借鉴。     

平流层飞艇的环境控制

文章叙述了平流层飞艇要经历的对流层和平流层的环境特点,对平流层飞艇的环境控制进行了分析,并提出了环境控制的几个注意问题。     

振动环境质量载荷效应探究

航天飞行器有爆脱冲击环境质量载荷效应现象,类似也有振动环境质量载荷效应问题。国外一直在作这方面研究,机理不清,没有定论。本文对此加以述评,并对机理进行初步探究,这对预示振动环境及制定振动环境试验条件有重要意义.     

某型飞机球形灭火瓶设计改进

本文对某型飞机球形灭火瓶失效情况进行统计分析,初步确定了故障原因。通过环境适应性摸底试验进一步验证分析,进行了设计改进。改进后的灭火瓶满足使用要求。     

Space weather center in Japan

Progress in information technology has enabled to collecting data in near real-time. This significantly improves our ability to monitor space weather conditions. We deliver information on near real-time space weather conditions via the internet. We have started two collaborations with space weather users. One is a measurement of geomagnetically induced current (GIC) of power grids in collaboration with a Japanese power company. The other concerns radiation hazards for aircrews. The radiation exposure level for aircrews was been determined by the Japanese government by the end of 2005. The proposed upper limit is 5 mSV a year. We are actively seeking ways to contribute to this subject. Our activities at the Japanese space weather center are reported in this paper.     

Characterization of the cataloged Fengyun-1C fragments and their long-term effect on the LEO environment

The intentional breakup of Fengyun-1C on 11 January 2007 created the most severe orbital debris cloud in history. The altitude where the event occurred was probably the worst location for a major breakup in the low Earth orbit (LEO) region, since it was already highly populated with operational satellites and debris generated from previous breakups. The addition of so many fragments not only poses a realistic threat to operational satellites in the region, but also increases the instability (i.e., collision cascade effect) of the debris population there.     

欧洲空间天气计划

简要介绍了空间天气的基本概念,并对欧洲空间天气计划的效益分析、用户需求、实施方案等方面的内容进行介绍。