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	A theoretical model for the estimation of maximum impact force from a rockfall based on contact theory 期刊论文 OAI收割 Journal of Mountain Science, 2018, 卷号: 15, 期号: 2, 页码: 430-443 作者: ZHANG Shi-lin; YANG Xing-guo; ZHOU Jia-wen \| 收藏 \| 浏览/下载：83/0 \| 提交时间：2018/01/30 Rockfall Motion Characteristics Contact Theory Maximum Impact Force
	The new approach for infrared target tracking based on the particle filter algorithm (EI CONFERENCE) 会议论文 OAI收割 International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Infrared Imaging and Applications, May 24, 2011 - May 24, 2011, Beijing, China 作者: Sun H.; Han H.-X.; Sun H. 收藏 \| 浏览/下载：59/0 \| 提交时间：2013/03/25 Target tracking on the complex background in the infrared image sequence is hot research field. It provides the important basis in some fields such as video monitoring precision and video compression human-computer interaction. As a typical algorithms in the target tracking framework based on filtering and data connection the particle filter with non-parameter estimation characteristic have ability to deal with nonlinear and non-Gaussian problems so it were widely used. There are various forms of density in the particle filter algorithm to make it valid when target occlusion occurred or recover tracking back from failure in track procedure but in order to capture the change of the state space it need a certain amount of particles to ensure samples is enough and this number will increase in accompany with dimension and increase exponentially this led to the increased amount of calculation is presented. In this paper particle filter algorithm and the Mean shift will be combined. Aiming at deficiencies of the classic mean shift Tracking algorithm easily trapped into local minima and Unable to get global optimal under the complex background. From these two perspectives that "adaptive multiple information fusion" and "with particle filter framework combining" we expand the classic Mean Shift tracking framework.Based on the previous perspective we proposed an improved Mean Shift infrared target tracking algorithm based on multiple information fusion. In the analysis of the infrared characteristics of target basis Algorithm firstly extracted target gray and edge character and Proposed to guide the above two characteristics by the moving of the target information thus we can get new sports guide grayscale characteristics and motion guide border feature. Then proposes a new adaptive fusion mechanism used these two new information adaptive to integrate into the Mean Shift tracking framework. Finally we designed a kind of automatic target model updating strategy to further improve tracking performance. Experimental results show that this algorithm can compensate shortcoming of the particle filter has too much computation and can effectively overcome the fault that mean shift is easy to fall into local extreme value instead of global maximum value.Last because of the gray and fusion target motion information this approach also inhibit interference from the background ultimately improve the stability and the real-time of the target track. 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
	Application of precision harmonic gear drive in focusing mechanism of space camera (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 作者: Zhang X.; Zhang X.; Zhang X. 收藏 \| 浏览/下载：26/0 \| 提交时间：2013/03/25 A kind of precision harmonic gear drive in the focusing mechanism of space camera is studied which adopt external meshing complex wave transmission mode. Wave generator is combined with an elliptic cam and a flexible bearing around it. Flexspline is a structure of single wave with the same teeth. The output shaft is supported by a single cross-roller bearing. Ball screws connected the output shaft translate the rotational motion to the linear motion and drive the focusing mirror repeated moving along the linear guide. The output rigid wheel is connected with absolute encoder to detect displacement of focusing movement. It has the characteristics of big transmission ratio high precision compact structure high efficiency and smooth running etc. According to the practical application of this harmonic gear drive in the space camera the location relationship between the displacement of focusing structure and the focal plane movement is derived and the system error is analyzed its accuracy is tested with the open-loop control method. Experimental results show that transmission ratio of the instrument is 1:70 repeated positional accuracy is 2m which meet the requirements for use. 2010 SPIE.
	THE GLACIER MOVEMENT ESTIMATION AND ANALYSIS WITH INSAR IN THE QINGHAI-TIBETAN PLATEAU 会议论文 OAI收割 2009 Ieee International Geoscience and Remote Sensing Symposium, Vols 1-5, New York Li, Zhen; Zhou, Jianmin; Tian, Bangsen 收藏 \| 浏览/下载：20/0 \| 提交时间：2014/12/07 D-InSAR glacier movement characteristics Qinghai-Tibetan Plateau SATELLITE RADAR INTERFEROMETRY ICE-SHEET MOTION SAR INTERFEROMETRY GREENLAND
	The analyse of the influence of external disturbance on the motion of a six-wheeled lunar rover 会议论文 OAI收割 IEEE International Conference on Mechatronics and Automation, Harbin, China, August 5-8, 2007 作者: Gu KF(谷侃锋); Wang HG(王洪光); Zhao MY(赵明扬) 收藏 \| 浏览/下载：16/0 \| 提交时间：2012/06/06 six wheels lunar rover mobile robot motion characteristics steering characteristics external disturbance
	A method for improving the precision of motion vector estimation based on gyroscope (EI CONFERENCE) 会议论文 OAI收割 ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China 作者: Sun H.; Sun H.; Zhang Y. 收藏 \| 浏览/下载：18/0 \| 提交时间：2013/03/25 The piezoelectric gyroscope is regarded as an important device which measures the motion vector among frames of the dynamic image sequences precision of its output signal directly determines the precision of the image stabilization. Analyzing the characteristics of output noise of gyroscope it is available for us to suppress the output noise by applying the median filtering algorithm and wavelet transformation. The experiment results of electronic image stabilization have shown that this method can improve the precision of motion vector estimation effectively.
	Comparisons on the mooring line force and cage motion characteristics of gravity and sea station cages 会议论文 OAI收割 15th International Offrshore and Polar Engineering Conference, ISOPE-2005, Seoul, Korea, Republic of, June 19, 2005 - June 24, 2005 作者: Li YC; Gui FK; Song F(宋凡) 收藏 \| 浏览/下载：17/0 \| 提交时间：2017/06/01 Force characteristics Gravity Cage Mooring line Motion characteristics Sea Station Cage