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浏览/检索结果: 共14条，第1-10条 帮助

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家猪毛色和窝产仔数性状的群体基因组学研究 学位论文  OAI收割
北京: 中国科学院大学, 2018
作者:  吕梦蝶
  |  收藏  |  浏览/下载：31/0  |  提交时间：2020/12/15
Controlled Growth of Single-Crystal Twelve-Pointed Graphene Grains on a Liquid Cu Surface 期刊论文  OAI收割
ADVANCED MATERIALS, 2014, 卷号: 26, 期号: 37, 页码: 6423-6429
作者:  Geng, Dechao;  Meng, Lan;  Chen, Bingyan;  Gao, Enlai;  Yan, Wei
  |  收藏  |  浏览/下载：27/0  |  提交时间：2019/04/09
maximizing maximal angles for plane straight-line graphs 期刊论文  OAI收割
COMPUTATIONAL GEOMETRY-THEORY AND APPLICATIONS, 2013, 卷号: 46, 期号: 1, 页码: 17-28
Aichholzer Oswin; Hackl Thomas; Hoffmann Michael; Huemer Clemens; Por Attila; Santos Francisco; Speckmann Bettina; Vogtenhuber Birgit
  |  收藏  |  浏览/下载：18/0  |  提交时间：2013/09/17
The design problems of one kind of chaotic one-way hash function (EI CONFERENCE) 会议论文  OAI收割
2012 4th International Conference on Multimedia and Security, MINES 2012, November 2, 2012 - November 4, 2012, Nanjing, Jiangsu, China
Li P.; Zhang M.; Shi J.
收藏  |  浏览/下载：22/0  |  提交时间：2013/03/25
Application of carbon fibre reinforced plastic for optical camera structure (EI CONFERENCE) 会议论文  OAI收割
2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China
An Y.; Yao J.-S.
收藏  |  浏览/下载：16/0  |  提交时间：2013/03/25
Optical camera is a high-precision optical instrument  and the optical lens must be always stable under various environments  so the structural materials of optical camera should have good stability and machining performance characteristics. Generally  the weight of the camera increases with the increasing size of optical camera aperture. The application of carbon fibre reinforced plastic(CFRP) in optical camera can help to improve the situation and meet the requirements of large volume and light weight. In this paper  the properties of several kind of materials used in camera structure were compared  the advantages of CFRP used in optical camera were analyzed  the CFRP application profiles of domestic and international were introduced  and the reason of gap was pointed out. There is a conclusion that CFRP will be widely used in the optical camera in China. 2012 IEEE.  
Stabilization and tracking precision improved based on disturbance observer (EI CONFERENCE) 会议论文  OAI收割
2011 2nd International Conference on Mechanic Automation and Control Engineering, MACE 2011, July 15, 2011 - July 17, 2011, Inner Mongolia, China
Sun G.; Zhu M.; Jia H.
收藏  |  浏览/下载：31/0  |  提交时间：2013/03/25
Based on the kinematics of semi-strapdown seeker  the framework coordinate of the semi-strapdown seeker is established and the optical axis stabilization equation of semistrapdown seeker is deduced based on product of exponential (POE) formula. The stabilization control principle block diagram of semi-strapdown seeker is shown based on the stabilization equation. The main influence factors of the stability precision are pointed out  such as friction disturbance  velocity measurement noise and missile disturbance. For the sake of improving the stabilization precision and tracking precision  disturbance observer was proposed in the inner loop of semi-strapdown seeker servo-control system. The low frequency external disturbance and high frequency velocity measurement noise are effectively restrained by the disturbance observer as shown in hardware-in-loop simulation  and optical axis stabilization precision and tracking precision are greatly improved. 2011 IEEE.  
Optical axis stabilization of semi-strapdown seeker based on disturbance observer (EI CONFERENCE) 会议论文  OAI收割
2011 International Conference on Information and Automation, ICIA 2011, June 6, 2011 - June 8, 2011, Shenzhen, China
Sun G.; Zhu M.; Yin S.; Jia H.
收藏  |  浏览/下载：21/0  |  提交时间：2013/03/25
Based on the kinematics of semi-strapdown seeker  the framework coordinate of the seeker is established. The optical axis stability equation of semi-strapdown seeker is deduced by using attitude transformation matrix. Then  the stability control principle block diagram of semi-strapdown seeker is shown based on the stability equation. The main factors that influence the stabilization precision are pointed out  such as friction disturbance  velocity-measuring noise and missile disturbance. In order to improve the stabilization precision  disturbance observer was proposed in semi-strapdown seeker stability control. The low frequency external disturbance and high frequency velocity measurement noise are effectively restrained by the disturbance observer as shown in hardware-in-loop simulation  and optical axis stabilization precision is improved nearly 20 times and 5 times due to two different frequencies with same amplitude. 2011 IEEE.  
A study of the pointed observation methods and sensitivity of HXMT 期刊论文  OAI收割
Chinese Physics C, 2010, 卷号: 34, 期号: 1, 页码: 66-71
作者:  Jin, Jing;  Chen, Yong;  Zhang, Shuang-Nan;  Zhang, Shu;  Li, Xin-Qiao
  |  收藏  |  浏览/下载：11/0  |  提交时间：2019/07/11
A study of the pointed observation methods and sensitivity of HXMT 期刊论文  OAI收割
CHINESE PHYSICS C, 2010, 卷号: 34, 期号: 1, 页码: #REF!
作者:  Jin, J;  Chen Y(陈勇);  Zhang SN(张双南);  Zhang S(张澍);  Li XQ(李新乔)
收藏  |  浏览/下载：24/0  |  提交时间：2016/04/12
A study of the pointed observation methods and sensitivity of HXMT 期刊论文  OAI收割
中国物理C, 中国物理C, 2010, 2010, 期号: 1, 页码: 66-71, 66-71
作者:  Jin J(金晶);  Chen Y(陈勇);  Zhang SN(张双南);  Zhang S(张澍);  Li XQ(李新乔)
  |  收藏  |  浏览/下载：11/0  |  提交时间：2015/12/15