机构

• 力学研究所 [2]
• 长春光学精密机械与物... [1]

采集方式

• OAI收割 [3]

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浏览/检索结果: 共3条，第1-3条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Semi-analytical model of the vertical impact of a 316 stainless steel rod 期刊论文  OAI收割 INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, 2020, 卷号: 146, 页码: 103694 作者:  Ye X(叶璇);  Hu JQ(胡剑桥);  Song JR(宋晶如);  Liu XM(刘小明);  Wei YG(魏悦广)   |  收藏  |  浏览/下载：225/0  |  提交时间：2020/12/28 Vertical impact  DYNAMIC SPHERICAL INDENTATION  Length/diameter ratio  NUMERICAL-SIMULATION  Elasto-plastic contact  PENETRATION  Equivalent spring model  CONTACT  GLASS   Reconstructing The Vertical Distribution Of The Aeolian Saltation Mass Flux Based On The Probability Distribution Of Lift-Off Velocity 期刊论文  OAI收割 Geomorphology, 2008, 页码: 1-15 作者:  Kang LQ;  Guo LJ;  Liu DY(刘大有) 收藏  |  浏览/下载：816/60  |  提交时间：2009/08/03 Aeolian Saltation  Lift-Off Velocity  Probability Distribution  Vertical Distribution Of Mass Flux  Atmospheric Boundary-Layer  Impact Process  Sand  Wind  Grains  Bed  Collisions  Transport  Simulations  Speed   Research on tracking approach to low-flying weak small target near the sea (EI CONFERENCE) 会议论文  OAI收割 ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China 作者:  Xue X.-C. 收藏  |  浏览/下载：35/0  |  提交时间：2013/03/25 Automatic target detection is very difficult in complicate background of sea and sky because of the clutter caused by waves and clouds nearby the sea-level line. In this paper  in view of the low-flying target near the sea is always above the sea-level line  we can first locate the sea-level line  and neglect the image data beneath the sea-level line. Thus the noise under the sea-level line can be suppressed  and the executive time of target segmentation is also much reduced. A new method is proposed  which first uses neighborhood averaging method to suppress background and enhance targets so as to increase SNR  and then uses the multi-point multi-layer vertical Sobel operator combined with linear least squares fitting to locate the sea-level line  lastly uses the centroid tracking algorithm to detect and track the target. In the experiment  high frame rate and high-resolution digital CCD camera and high performance DSP are applied. Experimental results show that this method can efficiently locate the sea-level line on various conditions of lower contrast  and eliminate the negative impact of the clutter caused by waves and clouds  and capture and track target real-timely and accurately.