中国科学院机构知识库网格
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Formation of the Moping Dome in the Xuefengshan Orocline, Central China and its Tectonic Significance 期刊论文  OAI收割
ACTA GEOLOGICA SINICA-ENGLISH EDITION, 2013, 卷号: 87, 期号: 3, 页码: 720-729
作者:  
Shi Wei;  Dong Shuwen;  Li Jianhua;  Tian Mi;  Wu Guoli
  |  收藏  |  浏览/下载:15/0  |  提交时间:2017/12/22
Thermal analysis on supersonic ellipsoidal dome (EI CONFERENCE) 会议论文  OAI收割
2nd International Conference on Multimedia Technology, ICMT 2011, July 26, 2011 - July 28, 2011, Hangzhou, China
Jiang Z.; Wei Q.; Jia H.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
Studied the transient thermal transfer analysis method due to a kind of supersonic ellipsoidal dome  which is a conformal dome. Illuminated the principle of transient thermal transfer analysis. Accomplished the transient thermal analysis based on the model of ellipsoidal dome  and studied the influence about the different material and the different velocity. Considered three materials consist of MgF2  Al2O3  and ZnS  and meanwhile  the velocity was Mach2.5  and the time consists of 10s  20s and 60s. The temperature initial loads were from FLUENT thermal simulation. The thermal conduction analysis and the thermal convection analysis were finished in software ANSYS  in which the entire transient thermal analysis consists of modeling  meshing element  calculating and getting the results. The different temperature distributions based on varied time were gotten about the different materials. The results from analysis showed the temperature distribution of the structure of ellipsoidal dome  which could help the following coupled thermal-structure analysis. 2011 IEEE.  
Thermal-structure analysis of supersonic dome based on three materials (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Electric Information and Control Engineering, ICEICE 2011, April 15, 2011 - April 17, 2011, Wuhan, China
Jiang Z.; Ai X.; Wei Q.; Liu B.; Jia H.
收藏  |  浏览/下载:24/0  |  提交时间:2013/03/25
To a supersonic missile  a seeker could enhance the aerodynamic ability due to decrease the resistance in flying. At the same time  the primary function of a seeker has been considered as the most important equipment for a missile  due to the importance for cueing of targets and tracking for the final approach. However  the dome of a seeker  which is made up of glass  has poor mechanical performance. Especially  in the higher altitude  for a dome  in which the aerothermal and pressure loads could destroy the structure easily  it is necessary to do the thermal-structure coupled analysis due to varied materials. In the paper  to take the spherical dome of a seeker as a example  the analysis has been completed according to the varied materials consist of MgF2  Al2O3 and ZnS. The temperature loads and the pressure loads derived from the results of fluent analysis has been forced on the surface of dome  which simulates the actual Mach 2.5 in flying. According to the results of coupled analysis  the SEQV stress of the dome radium 80mm based on three materials had reached to 31MPa  which shows that the strength is sufficient for Mach 2.5  and offered the warranty to design the attaching to missile for the dome. At the same time  the results required the flexible mounting for the dome due to the displacements results  which the crystal material couldn't accept. 2011 IEEE.  
Gimbal displacement error analysis on an electro-optical seeker (EI CONFERENCE) 会议论文  OAI收割
Optical Design and Testing IV, October 18, 2010 - October 20, 2010, Beijing, China
作者:  
收藏  |  浏览/下载:32/0  |  提交时间:2013/03/25
It is essential to analyze the gimbal displacement errors for a seeker due to the importance for cueing of targets and tracking for the final approach. Otherwise  for a seeker electro-driven with a concentric glass dome  the large errors will decrease the picking  pointing  and tracking precision rooted from the displacement errors existing between the rotation center of the optical system and the gimbal. And the gimbaled camera system displacement errors are never eliminated but reduced due to the geometric errors consists of geometric tolerances of gimbal structure  manufacture  installation and vibration coming from working environment. In this paper  the gimbal displacement errors in an electro-optically stabilized platform resulting from geometric errors and environment errors were analyzed and shown in detail. The mathematical modal of the gimbal displacement errors created based on multi-body dynamics demonstrated the connection between the gimbal displacement errors and the stabilized platform. Taking a visible light image seeker as a case  the diameter is 120mm  and the geometric tolerances came from the values of primary design and the vibration data came from the environmental vibration test on the pitch-yaw seeker  and at the same time  the errors resulting from installation were considered too. Based on calculating  the maximum gimbal displacement error will reach to 0.2mm for pitching angle smaller than 40 and yawing angle smaller than 60. However  the critical parts have been found out according to the probability theory and the reliability analysis successfully used in the paper  and finally  the maximum gimbal displacement error reduced to 0.1mm  which is acceptable corresponding to the picking  pointing and tracking precision for an optical imaging seeker. 2010 Copyright SPIE - The International Society for Optical Engineering.  
Midcrustal low-velocity layer beneath the central Himalaya and southern Tibet revealed by ambient noise array tomography 期刊论文  OAI收割
GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, 2009, 卷号: 10, 期号: Q05007
作者:  
Gao X(高星)
收藏  |  浏览/下载:19/0  |  提交时间:2010/04/21
Characteristics of shallow gas hydrate in Okhotsk Sea 期刊论文  OAI收割
SCIENCE IN CHINA SERIES D-EARTH SCIENCES, 2008, 卷号: 51, 期号: 3, 页码: 415-421
作者:  
XiWu, Luan;  YoungKeun, Jin;  Obzhirov, Anatoly;  BaoJing, Yue
  |  收藏  |  浏览/下载:18/0  |  提交时间:2010/12/24
Contrasted tectonic styles for the Paleoproterozoic evolution of the North China Craton. Evidence for a similar to 2.1 Ga thermal and tectonic event in the Fuping Massif 期刊论文  OAI收割
JOURNAL OF STRUCTURAL GEOLOGY, 2008, 卷号: 30, 期号: 9, 页码: 1109-1125
作者:  
Trap, P.;  Faure, M.;  Lin, W.;  Bruguier, O.;  Monie, P.
  |  收藏  |  浏览/下载:12/0  |  提交时间:2018/09/26
Contrasted tectonic styles for the Paleoproterozoic evolution of the North China Craton. Evidence for a similar to 2.1 Ga thermal and tectonic event in the Fuping Massif 期刊论文  OAI收割
JOURNAL OF STRUCTURAL GEOLOGY, 2008, 卷号: 30, 期号: 9, 页码: 1109-1125
作者:  
Trap, P.;  Faure, M.;  Lin, W.;  Bruguier, O.;  Monie, P.
  |  收藏  |  浏览/下载:19/0  |  提交时间:2018/09/26
Tracking system of 2m LAMOST-style telescope for the Antarctic Plateau 会议论文  OAI收割
Orlando, FL, 2006-5-24
作者:  
Guomin Wang;  Bozhong Gu;  Heng Zuo;  Xiang Jiang
收藏  |  浏览/下载:24/0  |  提交时间:2013/12/28