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Controls on the present-day dynamic topography predicted from mantle flow models since 410 Ma 期刊论文
GEOPHYSICAL JOURNAL INTERNATIONAL, 2021, 卷号: 225, 期号: 3, 页码: 1637-1652
作者:  Yang, An;  Yang, Ting
收藏  |  浏览/下载：30/0  |  提交时间：2021/09/18
Upper mantle density modelling for large-scale Moho gravity inversion: case study on the Atlantic Ocean 期刊论文
GEOPHYSICAL JOURNAL INTERNATIONAL, 2019, 卷号: 216, 期号: 3, 页码: 2134-2147
作者:  Gui, Zhou;  Wang, Zhenjie;  Dong, Dongdong;  Wu, Shiguo;  Li, Mei
收藏  |  浏览/下载：48/0  |  提交时间：2019/07/08
Upper mantle density modelling for large-scale Moho gravity inversion: case study on the Atlantic Ocean 期刊论文
GEOPHYSICAL JOURNAL INTERNATIONAL, 2019, 卷号: 216, 期号: 3, 页码: 2134-2147
作者:  Bai, Yongliang;  Li, Mei;  Wu, Shiguo;  Dong, Dongdong;  Gui, Zhou
收藏  |  浏览/下载：34/0  |  提交时间：2019/08/28
Sn-wave velocity structure of the uppermost mantle beneath the Australian continent 期刊论文
GEOPHYSICAL JOURNAL INTERNATIONAL, 2018, 卷号: 213, 期号: 3, 页码: 2071-2084
作者:  Wei, Zhi;  Kennett, Brian L. N.;  Sun, Weijia
收藏  |  浏览/下载：25/0  |  提交时间：2018/09/28
一种定量地消除波速横向变化影响的三叉震相一维波速结构反演计算方案 期刊论文
北京大学学报 自然科学版, 2016
李嘉琪; 王曙光; 蔡晨; 宁杰远
收藏  |  浏览/下载：3/0  |  提交时间：2017/12/04
Synergistic Effect of Layered Double Hydroxides Containing Rare Earth Element on the Intumescent Flame Retardant Poly (butylene succinate) Composites 期刊论文
Chinese Journal of Materials Research, 2013, 卷号: Vol.27 No.6, 页码: 589-596
作者:  Liu Yuejun;  Mao Long
收藏  |  浏览/下载：6/0  |  提交时间：2020/01/05
Analysis of inertia dyadic uncertainty for small agile satellite with control moment gyros (EI CONFERENCE) 会议论文
2010 IEEE International Conference on Mechatronics and Automation, ICMA 2010, August 4, 2010 - August 7, 2010, Xi'an, China
Sun Z.; Zhang L.; Jin G.; Yang X.
收藏  |  浏览/下载：12/0  |  提交时间：2013/03/25
With the increasing demands for the agility of the next earth imaging satellite  control moment gyro (CMG) is considered to be the most suitable actuator because of its torque amplification capability. However  a CMG system may introduce uncertainty of inertia dyadic to a satellite's attitude control system. The uncertainty is negligible for large space vehicles  but it has not been tested whether it can be ignored for small agile satellites. How to model the CMG system inertia dyadic varying with gimbal angles  and what influence it will put on the performance of attitude control system haven't been test accurately as well. All of them are dealt with mathematically and accurately in this paper. This paper firstly gives mathematic descriptions of the inertia dyadic of the 4-CMG pyramid configuration system  varying with gimbal angles  and then designs a variable structure control law for small agile satellite using CMGs. Finally  numerical simulation suggests that the inertia dyadic variation of a 4-CMG pyramid configuration system is approximately centesimal of the total inertia dyadic of the satellite  and that the designed variable structure control law is of good robust performance for an example of large-angle attitude maneuver  despite of the variation of the inertia dyadic. 2010 IEEE.  
Design of optical elements for imaging the earth's plasmasphere (EI CONFERENCE) 会议论文
International Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Optoelectronic System Design, Manufacturing, and Testings, September 9, 2007 - September 12, 2007, Beijing, China
Wang L.-H.; Wang X.-K.; Chen B.
收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25
Studying the distribution of He+ in Earth's plasmasphere by detecting its resonantly-scattered emission at 304A will record the structure and dynamics of the cold plasma in Earth's plasmasphere on a global scale. EUV imaging systems usually utilizes near normal incidence optics including multilayer mirror and filter. In this paper  the space condition of the Earth's plasmasphere to confirm the expected performance of mirror and filter for this task were analyzed and some guidelines for the design of the optical elements were introduced. In order to achieve higher response at 304A and reduce 584A radiation for the optical system  a new multilayer coating of Mo/Si with UOx (x=2-3) was developed  and it is indicated that promising filter material is Al/C with a nickel mesh. In addition  we compute the reflectance of multilayer mirror based on optical constants and the transmission of the filter based on atomic scattering factor. The results show the multilayer mirror has high reflectance of 26.27% at 304 Aand low reflectance of 0.60% at 584A. Finally  the conversion efficiency of mirror coupled with filter is 6.88% at 304A and 0.01% at 584 A.  
中国大陆地壳上地幔S波品质因子三维层析成像 期刊论文
地球物理学报, 2003
洪学海; 朱介寿; 曹家敏; 许卓群
收藏  |  浏览/下载：1/0  |  提交时间：2015/11/16

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