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浏览/检索结果: 共7条,第1-7条 帮助

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A new method for orbit determination on the Gaia SB1s 会议论文  OAI收割
Nice, FRANCE, 2017-04-24
作者:  
Wang XL(王晓丽)
  |  收藏  |  浏览/下载:37/0  |  提交时间:2019/01/23
Parameter optimization of passive dynamic walking biped with knees (EI CONFERENCE) 会议论文  OAI收割
2012 2nd International Conference on Materials Science and Information Technology, MSIT 2012, August 24, 2012 - August 26, 2012, Xi'an, Shaan, China
作者:  
Zhang P.
收藏  |  浏览/下载:25/0  |  提交时间:2013/03/25
A method to find the optimized parameter values of passive dynamic walking biped is presented. The effects of biped physical parameters on the stability property of passive gaits are studied by simulation experiments. The chosen parameters include the mass distribution  length of leg and slope angle. The stability property of passive walking limit cycles is used as criterion of optimization calculation  including the orbital stability described by eigen-values of linearized Poincare map and the global property described by size of attraction region. The simulation results show how the stability of limit cycle varies when physical parameters of the passive biped change. The work is useful to explore the inherent property of passive dynamic walking and can be used as an important instruction in the mechanical design of biped robots based on principle of passive dynamic walking. (2012) Trans Tech Publications  Switzerland.  
Fully relativistic theories and methods for NMR parameters 期刊论文  OAI收割
THEORETICAL CHEMISTRY ACCOUNTS, 2012, 卷号: 131, 期号: 1
作者:  
Xiao, Yunlong;  Sun, Qiming;  Liu, Wenjian
  |  收藏  |  浏览/下载:15/0  |  提交时间:2019/04/09
THE IMPACTS OF ORBITAL PARAMETERS ON SUMMER PRECIPITATION OVER CHINA IN THE HOLOCENE 期刊论文  iSwitch采集
JOURNAL OF TROPICAL METEOROLOGY, 2011, 卷号: 17, 期号: 2, 页码: 103-112
作者:  
Huang Jian-bin;  Wang Shao-wu;  Wen Xin-yu;  Zhou Tian-jun;  Zhu Jin-hong
收藏  |  浏览/下载:36/0  |  提交时间:2019/10/08
Design and calibration of the solar irradiance monitor (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications, May 24, 2011 - May 26, 2011, Beijing, China
作者:  
Yang D.-J.;  Gong C.-H.;  Wang Y.-P.;  Ye X.;  Fang W.
收藏  |  浏览/下载:38/0  |  提交时间:2013/03/25
The solar irradiance monitor (SIM)  with the design accuracy of 5  used to monitor the secular changes of the total solar irradiance on FY-3 satellite  takes the sun-scanning measurement method on-orbit. Compared to the sun-tracking measurement method  this method simplifies the structure and cuts the cost  but the measuring accuracy is affected by the sun-synchronous orbit  sunlight incidence angle and the installing angle of the SIM in the satellite. Through the ground calibration experiment  studies on the affection of different sunlight incidence angles to the measurement accuracy. First  by the satellite tool kit (STK) simulation software  simulates the orbital parameters of the sun-synchronous satellite  and calculates the Sun ascension and declination at any time. By the orbit coordinate transformation matrix gets the components of the Sun vectors to the axes of the satellite  and base on the components designs the field of view and the installing angles of the SIM. Then  designs and completes the calibration experiment to calibrate the affection of the incidence angles. Selecting 11 different angles between the sunlight and the satellite X-axis  measures the total solar irradiance by the SIM at each angle  and compares to the irradiances of the SIAR reference radiometers  and gets the coefficient curves of the three channels of the SIM. Finally  by the quadratic fitting  gets the correction equations on the incidence angles: R 1=5.7110-52 -2.45310 -3+1.0302  R2=2.8410-5-1. 96510-3+1.0314 and R3 =1.7210 -52-4.18410-4+0.9946. The equations will aimprove the on-orbit measurement accuracy of the solar irradiance  and are very important to the on-orbit data processing after the satellite launched. 2011 SPIE.  
Studies of the spin Hamiltonian parameters and the local structure of tetragonal Zr3+ Centers in orthophosphate MPO4 (M = Sc, Lu, Y) crystals 期刊论文  OAI收割
Zeitschrift Fur Naturforschung Section a-a Journal of Physical Sciences, 2006, 卷号: 61, 期号: 12, 页码: 688-690
G. Q. Qu; W. Fang; W. C. Zheng
收藏  |  浏览/下载:24/0  |  提交时间:2012/04/14
Zero-field splitting and g-factor studies for 3d(5) ions in tetragonal and trigonal symmetry 期刊论文  OAI收割
Physica B-Condensed Matter, 2005, 卷号: 364, 期号: 1-4, 页码: 122-129
Y. Lei; X. T. Zu; M. G. Zhao
收藏  |  浏览/下载:24/0  |  提交时间:2012/04/14