机构

• 物理研究所 [9]
• 长春光学精密机械与物... [2]
• 地质与地球物理研究所 [1]

采集方式

• OAI收割 [12]

内容类型

• 期刊论文 [10]
• 会议论文 [2]

发表日期

• 2010 [2]
• 2007 [2]
• 2006 [1]
• 2005 [1]
• 2004 [1]
• 2003 [1]
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浏览/检索结果: 共12条，第1-10条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 United steering of control moment gyros for small satellite with limited gimbal rate (EI CONFERENCE) 会议论文  OAI收割 2010 IEEE International Conference on Information and Automation, ICIA 2010, June 20, 2010 - June 23, 2010, Harbin, Heilongjiang, China Xu K.; Jin G.; Chen C. 收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25 Single Gimbal Control Moment Gyroscopes (SGCMG) can could provide large control torque and quick attitude maneuver rate to small satellites without any increase in power  volume and mass  which will help small satellites become more powerful. Singularity avoidance and failure steering are two important problems to SGCMGs and also the main focus in this field. A new united steering law for SGCMGs with capabilities of singularity avoidance and quick transition of singularity surfaces is developed in this paper. To ensuring the existence of null motion  the commanded output of controller was changed real-timely as the variation of singularity measurement of SGCMGs  which can avoid the gimbal angle rate saturation. This developed steering law could help the SGCMGs provide real-time control toques in spite of limitation of gimbal angle rate. Simulation analysis is conducted for a certain 4-SGCMG system mounted on a small satellite. Simulation results indicate that the steering law is very effective in singularity avoidance. 2010 IEEE.   Developing image-contrast theory and analysis methods in high-resolution electron microscopy 期刊论文  OAI收割 PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 2010, 卷号: 207, 期号: 12, 页码: 2639 Li, FH 收藏  |  浏览/下载：36/0  |  提交时间：2013/09/17 INCOMMENSURATE MODULATED STRUCTURES  PHASE-OBJECT APPROXIMATION  EXIT-WAVE RECONSTRUCTION  CRYSTAL-STRUCTURES  ATOMIC CONFIGURATION  MISFIT DISLOCATIONS  LOMER DISLOCATION  FOCUS-VARIATION  FOURIER IMAGES  CORE STRUCTURE   Narcissus analysis for cooled staring IR system (EI CONFERENCE) 会议论文  OAI收割 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies, AOMATT 2007: Advanced Optical Manufacturing Technologies, July 8, 2007 - July 12, 2007, Chengdu, China 作者:  Zhang X.;  Zhang X.;  Zhang X. 收藏  |  浏览/下载：26/0  |  提交时间：2013/03/25 Narcissus can have a deleterious effect on image quality for cooled infrared imaging systems. Therefore  analysis of narcissus is important for designing both scanning and staring optics. Narcissus is generally assumed to be negligible in staring IR optical designs because the shading effects can be removed by calibration of the detector array data. However  the calibration usually decreases sensitiveness of the system and Narcissus variation may be noticeable for sensors when the conditions changes as follows: 1. warming and cooling the optical housing  2. zooming optical elements  3. movement of lenses for focus. In that case  it will result in shading and other image defects even after calibration. To minimize these effects  narcissus should be assessed and controlled during the design of staring array IR system. We provided a direct and fast method for analyzing the narcissus variation in the presence of software such as LightTools  TracePro and ASAP  and proposed the principles in optical design of staring IR systems to reduce narcissus. A cooled staring IR system with serious narcissus was estimated and reoptimized. Narcissus analysis of this IR system confirmed the efficiency of the analysis method.   The evolution characteristics of geomagnetic disturbances during geomagnetic storms 期刊论文  OAI收割 CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2007, 卷号: 50, 期号: 1, 页码: 1-9 作者:  Wu Ying-Yan;  Xu Wen-Yao;  Chen Geng-Xiong;  Chen Bo;  Liu Xiao-Can   |  收藏  |  浏览/下载：20/0  |  提交时间：2018/09/26 storm-time variation  Dst index  S(q)  S(D)  main phase  S(q) focus   Image deconvolution in spherical aberration-corrected high-resolution transmission electron microscopy 期刊论文  OAI收割 ULTRAMICROSCOPY, 2006, 卷号: 106, 期号: 6, 页码: 539 Tang, CY; Chen, JH; Zandbergen, HW; Li, FH 收藏  |  浏览/下载：28/0  |  提交时间：2013/09/17 ATOMIC CONFIGURATION  CRYSTAL-STRUCTURE  WAVE-ABERRATION  FOCUS-VARIATION  RECONSTRUCTION  DIFFRACTION  DISLOCATION  HRTEM  POSITION  HREM   Restoring atomic configuration at interfaces by image deconvolution 期刊论文  OAI收割 JOURNAL OF ELECTRON MICROSCOPY, 2005, 卷号: 54, 期号: 5, 页码: 445 Tang, CY; Li, FH 收藏  |  浏览/下载：47/0  |  提交时间：2013/09/24 RESOLUTION ELECTRON-MICROSCOPY  EXIT-WAVE RECONSTRUCTION  0.1 NM RESOLUTION  FOCUS-VARIATION  GRAIN-BOUNDARY  DISLOCATION  DIFFRACTION  CRYSTALS  HREM  HOLOGRAPHY   Determination of a misfit dislocation complex in SiGe/Si heterostructures by image deconvolution technique in HREM 期刊论文  OAI收割 ULTRAMICROSCOPY, 2004, 卷号: 98, 期号: 2-4, 页码: 259 Wang, D; Zou, J; He, WZ; Chen, H; Li, FH; Kawasaki, K; Oikawa, T 收藏  |  浏览/下载：19/0  |  提交时间：2013/09/17 RESOLUTION ELECTRON-MICROSCOPY  SINGLE HETEROSTRUCTURES  FOCUS-VARIATION  BUFFER LAYER  RECONSTRUCTION  DENSITY  STRAIN  SI   Effect of diffraction crystallography on HREM 期刊论文  OAI收割 ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 2003, 卷号: 218, 期号: 4, 页码: 279 Li, FH 收藏  |  浏览/下载：26/0  |  提交时间：2013/09/17 RESOLUTION ELECTRON-MICROSCOPY  CRYSTAL-STRUCTURE DETERMINATION  PHASE-OBJECT APPROXIMATION  EXIT-WAVE RECONSTRUCTION  IMAGE DECONVOLUTION  LOMER DISLOCATION  FOCUS-VARIATION  CORE STRUCTURE  HRTEM  IMPROVEMENT   Atomic configuration in core structure of Lomer dislocation in Si0.76Ge0.24/Si 期刊论文  OAI收割 ULTRAMICROSCOPY, 2002, 卷号: 93, 期号: 2, 页码: 139 Wang, D; Chen, H; Li, FH; Kawasaki, K; Oikawa, T 收藏  |  浏览/下载：18/0  |  提交时间：2013/09/17 RESOLUTION ELECTRON-MICROSCOPY  IMAGE DECONVOLUTION  FOCUS-VARIATION  BUFFER LAYER  RECONSTRUCTION  HRTEM  DENSITY  SI   Electron crystallographic image-processing investigation and superstructure determination for (Pb0.5Sr0.3Cu0.2)Sr-2(Ca0.6Sr0.4)Cu2Oy 期刊论文  OAI收割 ACTA CRYSTALLOGRAPHICA SECTION A, 2001, 卷号: 57, 页码: 540 Liu, J; Li, FH; Wan, ZH; Fan, HF; Wu, XJ; Tamura, T; Tanabe, K 收藏  |  浏览/下载：30/0  |  提交时间：2013/09/17 INCOMMENSURATE MODULATED STRUCTURES  PHASE DETERMINATION  COMPLEX STRUCTURES  FOCUS-VARIATION  RESOLUTION  MICROSCOPY  DIFFRACTION  DECONVOLUTION  CRYSTALS  ENTROPY