摘要：This paper has analyzed the perturbations of a GeoX-Sat （virtual satellite） in geostationary orbit （GEO）. And control methods, strategies and calculation processes are designed of the East-West （E/W） station-keeping of the GeoX-Sat. The Attitude and Orbit Control Subsystem （AOCS） provides attitude information and maintains the required spacecraft attitude during all phases of the mission, starting at spacecraft separation from the launch vehicle and throughout its operational lifetime. For the GeoX-Sat exercising design, due to time limitations; only two modes of operation were considered after assumed launching operation： normal and station keeping.

摘要：今天正在经历着的事情,引发了人们对物质的过度诉求与欲望:此刻的艺术在充当着一个什么样的角色?我们试图借助艺术这个语言方式,拨开欲望的遮蔽,探求事物本身的真实性。唤起人们对城市文化的重新思考,从对物质的过度关注中解脱,共同关心城市原生态文化的传承和发展。

摘要：The increase of satellite’s dimensions has caused flexibility and formation of uncertainty in their model. This is because of space missions being more complex and using light moving structures in satellites. satellites are also encountered with various circumferential disturbance torques. This uncertainty in model and disturbance torques will cause undesirable performance of satellites’ attitude control system. So, for attitude control of these satellites, those methods should be used which are robust to uncertainty of the plant’s model and can reject the effects of disturbances and the measurement noise. One of these methods is the robust control design method. But, because of pole’s place of these satellite’s dynamics equations, the designing procedure of robust control will face difficulties. In this paper, by using an internal feedback as a novel idea, the satellite’s dynamics equations are changed in such a way that the poles will be placed in proper locations. Then, for these new equations, by regarding the effects of flexibility as uncertainty and considering the uncertainty in inertia matrix of satellite, an H∞ controller has been designed and for better performance, a μ-controller has been improved. Afterwards, these two controllers are analyzed and compared for the original dynamic equations, not for the modified ones. Also, for comparison, a classic controller has been also designed for the original plant and eventually all these three controllers are compared with each other.

摘要：A 28 V-half-regulated power bus topology and an integrated PCDU (Power Conditioning and Distribution Unit) were adopted to meet the energy demand for the Chang'e 4 relay *** paper first introduces the mission features and composition of the PSDS (Power Supply and Distribution System) for the Chang'e 4 relay *** to this satellite's unusual orbit,operational mode and project restrictions,special analysis and design was conducted on the PSDS from the perspective of weight-reduction,power management,and reliability and so *** low temperature storage of SA (Solar Array) was considered and how the antenna affects the SA was analyzed.A new kind of high-specific-energy 45 Ah (Ampere-hour) battery cell was used for the first *** make sure that the satellite would successfully pass the long shadow zones,a 100% DOD (Depth of Discharge) experiment was carried out on the *** the sunlight is almost always available and there are very few times for the battery to charge or discharge,battery care to extend its lifetime is also *** is a device that integrates power conditioning and power distribution in one *** PCDU on Chang'e 4 relay satellite can output more power with less weight because of the adoption of a 28 V-half-regulated power bus topology which was also used for the first time and used lighter material for its mechanical *** under low temperature on PCDU was conducted as well and a hot backup equalizing charge technique which is beneficial to keep performance of the battery is *** power distribution module,which is a module of PCDU,enhances the power utilization security by utilizing a static impedance measurement and build-in-test to avoid possible short *** for EED (Electrical Explosive Device) module,a protection plug was specially designed and three switches with different functions were connected in series to prevent the EED from exploding by *** addition,the allowable

摘要：satellite不仅仅是一家珠宝店,它是旅行、艺术和时装的结合,被赋予挣脱单一时尚束缚的使命。来自各个国家的潮流因素或是文化影响,再配合每个国家特有的宝石,让每一件珠宝都拥有着别样的光辉并触碰女性内心最深处的感性、精致和优雅。satellite珠宝是特别的,是给自由和流浪的灵魂指引方向的北极光,让我们推开魅力的大门进入到店主Sandrine的satellite世界。

摘要：TOSHIBA satellite M50（以下简称M50）的外观设计与传统的东芝笔记本电脑有所不同．是一款非常时髦，非常强调影音娱乐感受的14英寸宽屏机型。炫色顶盖是MSO外观设计的最大特点．有阳光橙、孔雀蓝和薄雾灰可选．我们测试的为高配版阳光橙M50。

摘要：13英寸或者更小一些的屏幕会令笔记本电脑更加轻薄,但可视面积有限;大于15英寸的产品有更好的视觉感受,不过携带起来可真是个负担;折中之后,采用14英寸屏幕的笔记本电脑依旧是市场的中流砥柱，各个品牌产品线中那些销量最大的型号几乎都采用了这个尺寸的屏幕设计，现在，东芝向本就竞争激励的主流战场派出了一位“高手”——TOSHIBAsatelliteR800．虽然其明确表示定位商用，

摘要：如今市场上刮起一阵宽屏笔记本之风,东芝自然也不甘落后,给我们带来了集成微软最新WindowsXP媒体中心系统的17英寸超大宽屏笔记本——satellite

摘要：2006年9月5日至11月5日，上海美术馆，第六届上海国际双年展开展。2006年9月6日，上海双年展的外围展，“黄盒子·青浦：中国空间里的当代建筑和艺术”大型展览，在青浦古镇民居建筑群落“小西门”正式揭幕。2006年9月5日，“跨越：当代艺术和设计”在对比窗艺廊江西中路展厅对外开放。2006年9月3日，上海Vanguard Gallery和上海滨江创意产业园联合举办的“satellite 2006当代艺术暨设计年展”拉开帷幕。

摘要：从产品的设计上可以看出，东芝公司对于低端笔记本电脑并没有在工艺水平和功能性方面作出妥协，satellite L10采用了银色和黑色搭配的设计，同时具备了商务笔记本稳重以及消费类笔记本时尚的感觉。机身边角处理以及线条设计显示出了不错的做工，各模具之间的缝隙均匀，键盘的按键布局以及手感都十分不错，