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From A-bomb to Shenzhou V

The safe landing of China’s firstspaceman on the grassland of north China’sInner Mongolia Thursday  (本文共2页) 阅读全文>>

《World Economy & China》2000年Z1期
World Economy & China

“China's Entry into the WTO Will Be a Historical Event Enabling China to Play a Broader Role in the World Economy”─Interview with Dr. Fred Bergsten

Dr.C.FredBergrtenisDirectoroftheinstituteforinternationalEconomicsinWashington,D.C.,oneofthemostimPOr...  (本文共7页) 阅读全文>>

《Chinese Journal of Aeronautics》2022年03期
Chinese Journal of Aeronautics

Optimization design containing dimension and buffer parameters of landing legs for reusable landing vehicle

For the landing legs with single air chamber in the buffer structure of the reusable landing vehicle, the geometric topological models and the dynamic model associated with the hard points of the landing legs are established. The geometric constraint relationship in the design of the landing legs is also obtained. The whole vehicle dropping test is conducted, and the test results agree well with that of the simulatio...  (本文共16页) 阅读全文>>

《Earth and Planetary Physics》2021年01期
Earth and Planetary Physics

An updated constraint on the local stratigraphy at the Chang'E-4 landing site

The Chang'E-4 mission has been exploring the lunar farside. Two scientific targets of the rover onboard are(1) resolving the possible mineralogy related to the South Pole-Aitken basin and(2) understanding the subsurface processes at the lunar farside.Publications to date that are based on the reflectance spectra and radar data obtained by the rover have shown a persistent inconsistency about the local stratigraphy. T...  (本文共13页) 阅读全文>>

《Chinese Journal of Aeronautics》2021年02期
Chinese Journal of Aeronautics

Whole-process design and experimental validation of landing gear lower drag stay with global/local linked driven optimization strategy

Landing gear lower drag stay is a key component which connects fuselage and landing gear and directly effects the safety and performance of aircraft takeoff and landing. To effectively design the lower drag stay and reduce the weight of landing gear, Global/local Linked Driven Optimization Strategy(GLDOS) was developed to conduct the overall process design of lower drag stay in respect of optimization thought. The wh...  (本文共11页) 阅读全文>>

《Journal of Mountain Science》2020年02期
Journal of Mountain Science

Identification of landing sites for rescue helicopters in mountains with use of Geographic Information Systems

Helicopters are often used in mountain rescue both for rescuers moving in the area of accidents and for evacuating victims, but in steep or forested terrain finding a landing place can be problematic. The main aim of this research is to use Digital Elevation Model(DEM) and cartographic database analysis to select locations that can be used as landing site for the rescue helicopters. Methods were based on GIS analysis...  (本文共10页) 阅读全文>>