Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Zhijun Zhao"'
Publikováno v:
Science China Earth Sciences. 63:1745-1757
South China preserves a rich archaeological record elucidating the evolution of early modern humans during the Late Pleistocene. However, few studies on plant utilization were conducted in this region. We used phytolith analysis from Yahuai Cave, Gua
Publikováno v:
Journal of Colloid and Interface Science. 538:440-448
Layered double hydroxides (LDHs) were innovatively employed in this study as catalyst for synthesis gas conversion to chemicals, such as oxygenates. Cobalt-aluminium layered double hydroxides (Co-Al LDHs) was prepared at different temperatures. and l
Publikováno v:
2017 IEEE International Conference on Mechatronics and Automation (ICMA).
In order to verify whether a small-scale rotorcraft can fly on Mars, this paper is proposed to establish a Martian atmosphere simulator and to design a hover test stand for coaxial rotorcraft rotor. Since the ultra-low air density of Mars is approxim
Publikováno v:
ROBIO
In the paper, a dexterous hand for space service is introduced. Its structure such as fingers, wrist and drive are discussed, there are position sensor, force sensor and tension sensor in the finger. Then the kinematic and joint angle mapping of the
Publikováno v:
International Journal of Aeronautical and Space Sciences. 14:237-246
It is of great significance to utilize a landing mechanism to explore an asteroid. A landing mechanism named ALISE (Asteroid Landing and In Situ Exploring) for asteroid with soft surface is presented. The landing dynamic in the first turning stage, w
Publikováno v:
Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT). 2013:001870-001893
Existing Package-on-Package (PoP) solutions are rapidly approaching the logic memory bandwidth capacity in the multi-core mobile processor packages. Package on Package stack using the conventional solder balls has a serious pitch limitation below 400
Publikováno v:
International Symposium on Microelectronics. 2013:000094-000099
We are developing a new solution for wide I/O package on package applications, which is Bond Via Array (BVA) technology. The prototype vehicle built in this study has 1020 I/O's at a pitch of 0.24 mm with a high aspect ratio of approximately 10:1 and
Publikováno v:
ICIA
Asteroid landing is a new research field in deep space exploration, which has important scientific and economic values in learning the origin of the solar system and exploring the asteroid. It is microgravity and little media properties are obtained
Autor:
Gerald S. Frankel, Zhijun Zhao
Publikováno v:
Corrosion Science. 49:3089-3111
The first breakdown mechanism of AA7075 was studied by an in situ observation system in which a combination of a magnified image of the surface with the instantaneous polarization curve allowed determination of the corrosion process as a function of
Publikováno v:
ROBIO
Projectile is an important part of the anchoring system for landing on small bodies. It penetrates into the small bodies and supplies anchoring force to avoid flowing away of the lander. In order to advance the anchoring force of the projectile, a st