中国科学院机构知识库网格系统: 检索

A parallel orbital-updating based optimization method for electronic structure calculations 期刊论文 OAI收割
JOURNAL OF COMPUTATIONAL PHYSICS, 2021, 卷号: 445, 页码: 17
作者: Dai, Xiaoying; Liu, Zhuang; Zhang, Xin; Zhou, Aihui

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Density functional theory Electronic structure calculations Kohn-Sham energy functional minimization problem Parallel orbital-updating Optimization method

Real-time detection of BDS orbit manoeuvres based on the combination of GPS and BDS observations 期刊论文 OAI收割
IET RADAR SONAR AND NAVIGATION, 2020, 卷号: 14, 期号: 10, 页码: 1603-1609
作者: Tu, Rui; Zhang, Rui; Liu, Zhanke; Fan, Lihong; Han, Junqiang

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收藏 | 浏览/下载：36/0 | 提交时间：2021/11/29

Global Positioning System artificial satellites object detection BDS orbit manoeuvre detection method Global Positioning System single BDS system orbital manoeuvre observation time real-time detection Chinese BeiDou navigation satellite system timing services BDS satellites continuous PNT services reliable PNT services geostationary orbit global positioning navigation and timing services inclined geosynchronous medium earth orbit MEO combined GPS-BDS system receiver clock error bias time 157 0 min

Ergodic measures on spaces of infinite matrices over non-Archimedean locally compact fields 期刊论文 OAI收割
COMPOSITIO MATHEMATICA, 2017, 卷号: 153, 期号: 12, 页码: 2482-2533
作者: Bufetov, Alexander I.; Qiu, Yanqi

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收藏 | 浏览/下载：25/0 | 提交时间：2018/07/30

ergodic measures random matrices non-Archimedean locally compact fields Vershik-Kerov ergodic method Ismagilov-Olshanski multiplicativity orbital integrals inductively compact groups

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：21/0 | 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.

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：26/0 | 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.

Signature splitting of the pi h(11/2) band and high-spin structures in Tb-155 期刊论文 OAI收割
CHINESE PHYSICS C, 2010, 卷号: 34, 页码: 958-963
作者: Li Tao; Chen Bao-Ren; Liu Shu-Xin

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rare-earth high-j intruder orbital alignment particle-number-conserving method back-bending

Earth elevation map production and high resolution sensing camera imaging analysis (EI CONFERENCE) 会议论文 OAI收割
Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China
作者: Dai L.

收藏 | 浏览/下载：136/0 | 提交时间：2013/03/25

The Earth's digital elevation which impacts space camera imaging has prepared and imaging has analysed. Based on matching error that TDI CCD integral series request of the speed of image motion statistical experimental methods-Monte Carlo method is used to calculate the distribution histogram of Earth's elevation in image motion compensated model which includes satellite attitude changes orbital angular rate changes latitude longitude and the orbital inclination changes. And then elevation information of the earth's surface from SRTM is read. Earth elevation map which produced for aerospace electronic cameras is compressed and spliced. It can get elevation data from flash according to the shooting point of latitude and longitude. If elevation data between two data the ways of searching data uses linear interpolation. Linear interpolation can better meet the rugged mountains and hills changing requests. At last the deviant framework and camera controller are used to test the character of deviant angle errors TDI CCD camera simulation system with the material point corresponding to imaging point model is used to analyze the imaging's MTF and mutual correlation similarity measure simulation system use adding cumulation which TDI CCD imaging exceeded the corresponding pixel horizontal and vertical offset to simulate camera imaging when stability of satellite attitude changes. This process is practicality. It can effectively control the camera memory space and meet a very good precision TDI CCD camera in the request matches the speed of image motion and imaging. 2010 SPIE.

Site occupancy, magnetic moments, and elastic constants of off-stoichiometric Ni2MnGa from first-principles calculations 期刊论文 OAI收割
PHYSICAL REVIEW B, 2009, 卷号: 79, 期号: 14, 页码: 8
作者: Hu, Qing-Miao; Li, Chun-Mei; Yang, Rui; Kulkova, Svetlana E.; Bazhanov, Dmitry I.

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收藏 | 浏览/下载：14/0 | 提交时间：2021/02/02

density functional theory elastic constants elastic moduli ferromagnetic materials gallium alloys linear muffin-tin orbital method magnetic moments magnetomechanical effects manganese alloys martensitic transformations nickel alloys shape memory effects shear modulus stoichiometry

Syntheses, Structures, and Theoretical Studies of New Ternary Antimonides beta-RECoSb3 (RE = La-Nd, Sm) 期刊论文 OAI收割
European Journal of Inorganic Chemistry, 2009, 期号: 2, 页码: 230-237
W. Z. Cai, L. M. Wu, L. H. Li and L. Chen

收藏 | 浏览/下载：16/0 | 提交时间：2012/11/06

Transition metals Rare earth metal compounds Cobalt Antimon Electronic structure Calculations Tight-bonding linear muffin-tin orbital method magnetic-properties crystal-structure physical-properties transport-properties ln=la-nd gd pr ce dy tb

Site occupancy, magnetic moments, and elastic constants of off-stoichiometric Ni(2)MnGa from first-principles calculations 期刊论文 OAI收割
Physical Review B, 2009, 卷号: 79, 期号: 14
Q. M. Hu; C. M. Li; R. Yang; S. E. Kulkova; D. I. Bazhanov; B. Johansson; L. Vitos

收藏 | 浏览/下载：35/0 | 提交时间：2012/04/13

density functional theory elastic constants elastic moduli ferromagnetic materials gallium alloys linear muffin-tin orbital method magnetic moments magnetomechanical effects manganese alloys martensitic transformations nickel alloys shape memory effects shear modulus stoichiometry shape-memory alloys ni-mn-ga martensitic-transformation phase-transformations potential model heusler alloys landau theory transition metals approximation