基于分布式管理架构的应用型网管系统的设计与研究

根据当前IT应用的普及情况,分析了大中型企业中网络资源管理存在的问题,研究了网管软件的相关技术并设计了一套符合当前应用需求的分布式管理架构的应用型网管系统。该系统不但可监测各类操作系统的性能,还可对数据库、WEB服务等应用服务器的性能进行监控。结合网管软件的发展动态,展示了该应用型网管系统的工程应用价值。     

Atmospheric response to a Hot SST Event in November 2006 as observed by the AIRS instrument

Using Atmospheric Infrared Sounder (AIRS) products of atmospheric temperature and geopotential height, we investigate the atmospheric response to HE0611, which was found and investigated by [Qin, H., Kawamura, H., Sakaida, F., Ando, K. A case study of the tropical Hot Event in November 2006 (HE0611) using a geostationary meteorological satellite and the TAO/TRITON mooring array. J. Geophys. Res. 113, C08045, doi: 10.1029/2007JC004640, 2008]. HE0611 was formed by connecting two very high SST areas, HE0611-East and HE0611-West. The period-mean atmosphere temperatures at levels of 925 and 850 hPa in HE0611-West are higher, by about 0.5 K, than those in WE0611-East while the atmospheric temperatures at middle to high levels (700–300 hPa) are higher in HE0611-East. The period-mean geopotential heights HE0611-East are much lower than those in HE0611-West for the levels from the surface to 400 hPa. The mean geopotential heights from 400 hPa to 200 hPa are higher in HE0611-East. In the middle and high layers over HE0611-West, the atmosphere temperatures gradually decrease from 7th to 17th, and then increase significantly. The increase in HE0611-East starts from 15th November, which is earlier than that of HE0611-West. The geopotential heights in the high layer of both the areas also show corresponding behaviors. The lagged atmospheric response in the western part is confirmed by the correlation analysis. It emerges that the atmospheric response to HE0611 is well organized and associated with deep convention in HE0611-East and subsidence in HE0611-West. These are also consistent with the HE0611 features and evolution revealed by earlier HE studies.     

数值仿真技术在热真空试验中的应用

由于热真空试验中温度测点有限，且关键部位布置困难，不能反映试验过程部件整体和关键部位的温度结果，导致试验有效性和产品安全性难以判断。通过数值仿真技术对试验过程进行模拟，得到所有部件详细温度场，验证试验有效性与产品安全性；发现影响产品温度分布的因素，研究提高产品可靠性措施。通过对某天线热真空试验过程模拟，得到天线详细温度场，并发现产品散热板安装＂不紧密＂缺陷，是影响天线温度均匀性的＂关键点＂。     

通过全球专利分析看深空探测 自主导航与控制技术发展

深空探测作为人类航天活动的重要方向,是人类探索宇宙奥秘和寻求长久发展的必然途径,也是衡量一个国家综合国力和科学技术发展水平的重要标志.作为深空探测中的一类重要技术,自主导航与控制技术越来越多地受到关注并得到应用,成为各国深空探测技术研究和发展的热点之一.以深空探测自主导航与控制技术为对象,通过专利检索分析,研究国内外发展现状,试图获得技术趋势.     

软件技术专业“订单式”人才培养模式的探索和实践

本文从“订单式”人才培养模式的客观需求入手，依据课题的研究和实践经验，综述了软件技术专业“订单式”人才培养的开展过程，分析了“订单式”人才培养模式的关键问题并提出了解决方案。     

对转螺旋桨流场气动干扰数值模拟

基于结构网格动态面搭接技术，通过求解三维非定常雷诺平均纳维-斯托克斯(RANS)方程，对单独螺旋桨(SRP)滑流流场进行了数值模拟，结果与风洞试验数据吻合良好，在此基础上深入研究了对转螺旋桨（CRP）的非定常滑流效应及前后桨之间的气动干扰现象。计算结果表明:所采用的非定常RANS方法能够良好刻画对转螺旋桨滑流流场的发展变化特征，适用于分析前后桨气动干扰特性。前后桨桨尖涡的复杂相互作用是导致对转螺旋桨气动干扰的直接原因，后桨桨尖涡对于前桨桨尖涡具有一定耗散作用。在气动干扰影响下，对转螺旋桨气动力会产生周期性波动，波动周期与螺旋桨桨叶数相关, 6×6对转螺旋桨在1个旋转周期内产生了12次波动。气流穿过对转螺旋桨会发生两次加速，因此在相同工况下，对转螺旋桨的拉力系数和功率系数相比于单独螺旋桨分别增大约1倍，效率提升约1.5%。      

The land remote sensing commercialization Act of 1984

This article examines the effect that private-sector remote sensing activities might have on the international community and on the future of international cooperation in space. It describes in detail The Land Remote Sensing Commercialization Act of 1984, recently passed by the US Congress and signed by President Reagan. The article concludes that it is possible to develop domestic regulations that balance the economic interests of the private sector with the legal and political concerns of the international community.     

Ballooning activities in Japan

The Scientific Balloon Center of ISAS/JAXA has carried out two balloon campaigns at Sanriku, Iwate, Japan every year. Ten to twelve balloon vehicles are launched annually for scientific and engineering experiments. Since 2005, a Brazilian balloon campaign has also been conducted in cooperation with INPE. In the 2006 Brazilian campaign, large and heavy payloads up to 1500 kg for astronomy will be launched. New generation balloons, such as super-pressure balloons and high-altitude balloons with ultra-thin films, are being developed. The current status and prospect of the Japanese scientific ballooning are discussed.     

提高机载电子产品的可靠性——某告警系统的故障分析

介绍电子产品设计时元器件选用对系统可靠性的影响。结合实际案例,总结并强调在电子产品设计时的元器件选用应从质量等级入手,充分进行降额设计和热设计。阐明合理选用元器件是实现电子产品系统设计高可靠性水平的基础。     

镁合金新材料及制备加工新技术发展与应用

镁合金是国际公认的最有潜力的轻量化材料之一,被誉为“21世纪绿色工程金属”,其突出的结构减重效果有望解决我国关键装备和重大工程中迫切的轻量化问题。本文综述了近年来镁合金新材料的发展、镁合金制备加工新技术进展以及镁合金的应用发展现状,对当前镁合金领域存在的缺点进行了总结,并对镁合金未来发展重点及主要任务进行了展望。