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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
To precisely determine the integrated orbit of the Chinese manned spacecraft mission, a smoother and Bayesian filter based technique for optimum semi-codeless tracking of the P(Y) code on dual-frequency GPS signals has been advanced.
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Among the hazards that accompany the penetration of a pressurized manned spacecraft are critical crack propagation in the module wall, crew hypoxia, and uncontrolled thrust due to air rushing out of the module wall hole.
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The Investigation of Possible Approaches of Cataloged Space Objects to Manned Spacecraft
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By a combination of multi-spectral, remotely sensed data, visual observations from manned spacecraft, and ocean data gathered by ship and aircraft, the oceanography off southwest Spain has been determined as never before (Fig.
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Review of the Knowledge of Microbial Contamination of the Russian Manned Spacecraft
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| | Re-entry of an artificial satellite is a very complicated problem. It is related to many scientific theories and technical problems. This paper discusses only the re-entry orbit. Some reasonable re-entry orbits of a manned space-ship are presented. Safe return to the earth's surface is ensured by utilizing terrestrial aerodynamical forces (drag and lifting forces), and the main point is to solve the problem of large deceleration. This work commences from the differential equations of motion of an artificial... | | 本文讨论利用地球大气动力(阻力和升力)来设计载人飞船安全返航的、主要解决超重问题的合理轨道。从卫星在地球引力和大气动力作用下的运动方程出发,先得到近似分析解(11)和(12)式。由它们得到合理解决超重(最大值小于地面重力的六倍)的两种方案:一是改变阻力;另一是用适当的小升力。然后根据这两个方案用数值方法计算了三种返航轨道。在适当选取初始值时,这三种轨道都可以合理地解决超重问题,同时也能减轻防热困难。最后讨论了地球大气扁率对返航轨道的影响,计算结果表明,它的影响是可以忽略的。 | | 文摘来源 | | The precise and real simulation of the star scene in the astronauts training in manned space-flight would help the astronauts to recognize the spacecraft orientation and the orbital coordinates with respect to star positions, and to realize spacecraft maneuvering.In this paper, the problem of visual simulation of the star scene in space-flight training is discussed. A method for star scene simulation by means of planetarium is presented, and a mathematical model based on matrix theory for star scene simulat... | | 在载人飞船的航天模拟中,正确而逼真的星象视觉模拟有助于航天员利用星位来判断飞船本身轨道飞行的情况,标识自身的空间方位,以及赖以进行机动飞行。 本文针对航天视觉模拟中,如何实现逼真的星象模拟问题进行了探讨。提出了一种采用星象仪实现星象模拟的方法。并应用矩阵理论,建立了一套星象模拟的数学模型。通过计算机解算数学模型,并实时地控制星象仪运动,将能使受训者在航天模拟中,看到精确而逼真的星空景象。 | | 文摘来源 | | The space station is unlike any manned spacecraft, it is a permanent facility in space. A space station will permit quantum leaps in our research on science, on space technology, and in metals and lifesaving medicines which can be manufactured only in space. This paper deals with various aspects of space station such as composition of space station system, configurations, key technology, application and future development. | | 自1961年世界上第一名航天员上天以来,载人航天技术有了飞速的发展。载人航天器已由初期的小型载人飞船,发展到大型空间站和航天飞机。空间站的诞生,特别是永久性空间站的建立,将会引起人类社会的众多方面发生重大而深刻的变化。本文首先就过去十多年中美国、苏联和欧洲发射的空间站作一简略概括,然后对空间站的构型,用途和未来发展等进行论述。 | | 文摘来源 | |   | | << 更多相关文摘 |
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