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	Measuring internal velocity of debris flows by temporally correlated shear forces 期刊论文 OAI收割 JOURNAL OF EARTH SCIENCE, 2012, 卷号: 23, 期号: 3, 页码: 373-380 作者: Wei, Fangqiang; Yang, Hongjuan; Hu, Kaiheng; Chernomorets, Sergey 收藏 \| 浏览/下载：21/0 \| 提交时间：2012/12/13 debris flow internal velocity velocity measuring shear force flume experiment
	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.
	Attitude determination of small, dim and high-speed targets based on multi-CMOS intersecting system (EI CONFERENCE) 会议论文 OAI收割 2nd International Conference on Information Science and Engineering, ICISE2010, December 4, 2010 - December 6, 2010, Hangzhou, China 作者: Li M.; Zhao L.; Wang J. 收藏 \| 浏览/下载：32/0 \| 提交时间：2013/03/25 In order to measure attitude of small dim and high-speed targets in shooting range intersecting system based on multiple high-speed CMOS cameras was introduced in this paper. CMOS cameras were laid near from objects for small size using multiple CMOS cameras to compose intersecting system for big number of targets tested and selecting CMOS camera between CMOS and CCD for low cost and considering damage to measurement equipment of objects tested. Pitch angle and yaw angle were measured by extracting axle wire through image processing image sequences were obtained from cameras laying on two sides. Velocity of objects was calculated by least square curve-fitting acquiring coordinate of centroid on image received by CMOS camera laying below effective viewing field. One CMOS camera was laid on right ahead for measuring roll angle. Station mode introduced in this paper has virtue of low cost and free extending. 2010 IEEE.
	Study of high speed photography measuring instrument (EI CONFERENCE) 会议论文 OAI收割 27th International Congress on High-Speed Photography and Photonics, September 17, 2006 - September 22, 2006, Xi'an, China Zhang Z.; Sun J.; Wu K. 收藏 \| 浏览/下载：24/0 \| 提交时间：2013/03/25 High speed photograph measuring instrument is mainly used to measure and track the exterior ballistics which can measure the flying position of the missile in the initial phase and trajectory. A new high speed photograph measuring instrument is presented in this paper. High speed photography measuring system records the parameters of object real-time and then acquires the flying position and trajectory data of the missile in the initial phase. The detection distance of high speed photography is more than 4.5km and the least detection distance is 450m under the condition of well-balanced angular velocity and angular acceleration program pilot track error less than 5. This instrument also can measure and record the flying trail and trajectory parameters of plane aero naval missile.
	Comparative experimental study on several methods for measuring elastic wave velocities in rocks at high pressure 期刊论文 OAI收割 Science in china (Series D), 2002, 卷号: 45, 期号: 11, 页码: 990-998 XIE Hongsen; ZHOU Wenge; LIU Yonggang; GUO Jie; HOU Wei; ZHAO Zhidan 收藏 \| 浏览/下载：19/0 \| 提交时间：2012/04/09 elastic wave velocity rock high temperature and high pressure measuring method.