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浏览/检索结果: 共7条,第1-7条 帮助

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Following Other People's Footsteps: A Contextual-Attraction Effect Induced by Biological Motion 期刊论文  OAI收割
PSYCHOLOGICAL SCIENCE, 2022, 页码: 10
作者:  
Cheng, Yuhui;  Liu, Wenjie;  Yuan, Xiangyong;  Jiang, Yi
  |  收藏  |  浏览/下载:35/0  |  提交时间:2022/09/19
Using the photoinduced volt-ampere curves to study the p/n types of the corrosion products with semiconducting properties 期刊论文  OAI收割
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2021, 卷号: 881, 页码: 10
作者:  
Jing, Jiangping;  Chen, Zhuoyuan;  Feng, Chang
  |  收藏  |  浏览/下载:17/0  |  提交时间:2021/06/24
Spatial distribution of large-scale landslides induced by the 5.12 Wenchuan Earthquake 期刊论文  OAI收割
JOURNAL OF MOUNTAIN SCIENCE, 2011, 卷号: 8, 期号: 2, 页码: 246–260
Xu Qiang; Zhang Shuai; Li Weile
收藏  |  浏览/下载:32/0  |  提交时间:2013/08/12
Effect of gimbal point displacement on optical axis pointing precision in an image seeker (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
作者:  
Zhang X.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载:39/0  |  提交时间:2013/03/25
A concentric glass spherical dome was usually chosen as the transparent window mounted in front of the optical lens in an image seeker. However  optical ray had to change its direction when propagating through the dome due to refraction unless passing through the center of the dome  which demanded gimbal point coincide with the center of the dome exactly. In fact  gimbal point displacement could not be eliminating due to fabrication  assembly and vibration  therefore the optical axis pointing error generated. In this paper  the effect of gimbal point displacement on optical axis pointing precision in an image seeker was analyzed  and the theoretical expression of the optical axis pointing error was derived based on geometric optics  and the error dynamics was explored by numerical. Take a visible light image seeker as a case  the thickness of concentric glass spherical dome was 8mm and the inner radius was 72mm  and the optical axis pointing errors varying dynamically with the look angle and the gimbal point displacement were shown in graph. When the gimbal displacement was 0.11mm  the maximum optical axis pointing error was 0.054mrad that is equal to the instantaneous field of view (IFOV) corresponding to the camera system whose focal length was 120mm and pixel size was 6.5m. Furthermore  with the gimbal displacement increasing  the optical axis pointing error increased linearly. The analyzed results provided a theoretical basis for the displacement range  which had to be limited strictly in the gimbal design process. 2011 IEEE.  
Research on the the device of non-angular vibration for opto-electronic platform (EI CONFERENCE) 会议论文  OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Smart Structures and Materials in Manufacturing and Testing, April 26, 2010 - April 29, 2010, Dalian, China
An Y.; Song C.-P.; Kuang R.-J.; Jin G.
收藏  |  浏览/下载:32/0  |  提交时间:2013/03/25
The opto-electronic platform is the main equipment for aviation reconnaissance. It is a surveillance system with the function of search  recognition orientation and tracking by opto- electronic instruments. It is made up of opto-electronic instruments which are used to get high quality image  and stabilization tracking system to control stabilization and gesture of platform for exact tracking. The opto-electronic platform purpose is to achieve high quality image. Besides the impact of optic system  the image quality of the system is influenced greatly in the vibration environment. The research worked by Zhao peng which demonstrated the affection caused by angular vibration was worse than which caused by line vibration  and what was multiplied direct ratio with plane altitude. So it is necessary to design a new device which could be used widely and has good angular vibration isolation effect. According to the theory of parallelogram  the non-angular vibration device had been designed with spatial links  and the theory of non-angular vibration was analyzed. The three-dimensional model was set with UG  the analysis was done by ADAMS/vibration software. The acceleration and displacement response of the device in each direction was calculated by inspiriting it with sine wave of the acceleration in three directions  and the stiffness and damp were studied. All the work prove the design principle of the device is reasonable  and the device is adopted to keep the platform motion moving horizontally  at the meantime the device is good at isolating vibration in all directions. 2010 SPIE.  
The analysis of the large-diameter primary mirror deformation of surface figure in the temperature field (EI CONFERENCE) 会议论文  OAI收割
2010 International Conference on Computer, Mechatronics, Control and Electronic Engineering, CMCE 2010, August 24, 2010 - August 26, 2010, Changchun, China
Feng S.-L.
收藏  |  浏览/下载:20/0  |  提交时间:2013/03/25
Compensating time delays with neural predictions: are predictions sensory or motor? 期刊论文  OAI收割
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 2009, 卷号: 367, 期号: 1891, 页码: 1063-1078
Nijhawan, Romi; Wu, Si
收藏  |  浏览/下载:20/0  |  提交时间:2012/07/13