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Solar Radio Group Utrecht 《Space Science Reviews》1974,16(1-2):45-89
One of the purposes of this paper is to stress the fact that the solar type III radio burst is not the simple phenomenon it is sometimes suggested to be. Therefore we present in sections 1 to 7 its various properties derived from observations of the past 20 years. In Section 2 a few theories invoked to describe the basic features are reviewed. This may serve as an introduction to the subject. 相似文献
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Cimatron集团 《航空制造技术》2009,(19)
GibbsCAM已经有超过750个多任务车铣复合加工(MTM)机床后置处理程序.GibbsCAM软件多任务车铣复合加工(MTM)模块还包括模拟加工渲染功能,这是1个刀路检测模块.此外,还能使用机床仿真模块对GibbsCAM多任务车铣复合加工(MTM)生成的所有刀路进行动态仿真模拟、可视化验证,进行机床碰撞检测,避免发生干涉. 相似文献
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GE传感与检测科技集团 《航空制造技术》2009,(1)
2008年10月26日,GE传感与检测科技宣布推出Rhythm超声软件,这是Rhythm软件包中第一个专门用于超声波探伤的元件. 相似文献
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陈奎林 《南京航空航天大学学报》1999,31(6):686-690
K8教练飞机设计中的颤振分析包括数值计算、风洞试验、地面试验和飞行试验等工作,这些工作是在飞机设计和制造的不同阶段进行的,且彼此相关密不可分。文中对每一项工作作了评述。指出若仅采用其中的某一项分析或试验表明飞机的颤特性尚有不充分之处。只有将各种分析和试验结果进行相互验证、比较和修正,并进行综合分析,才能得出该飞机颤振安全的正确结论。 相似文献
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Ad hoc Expert Group IAA D. McKnight Co-chair W. Flury Co-chair V. Chobotov R. Hergott N.L. Johnson J.P. Loftus P.L. Meredith L. Perek D. Rex H. Sax A.A. Sukhanov M.G. Wolfe T. Yasaka 《Space Policy》1993,9(3)
This article is a shortened version of a position paper on orbital debris compiled by an Ad hoc Expert Group of the International Academy of Astronautics' Committee on Safety, Rescue and Quality. Its objectives were to elaborate on the need and urgency for action and to indicate ways for its implementation. The article reviews debris control options and methods ranging from those requiring no technology development to those which require new and thus far untried developments. 相似文献
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It is becoming increasingly clear that space activities can benefit from international cooperation, but concerns about national interests remain. This article examines the experience of the Inter-Agency Consultative Group (IACG), which achieved striking success in coordinating the efforts of the USA, the USSR, the European Space Agency and Japan to study Halley's Comet. Subsequently the IACG has undertaken a new project, focused on solar-terrestrial science, and further expansion could follow. However, tje group's success has depended on scrupulous respect for members' national autonomy, and so it is unlikely to herald the formation of a supranational space agency in the near future. 相似文献