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浏览/检索结果: 共11条，第1-10条 帮助

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Study on Synergistic Characteristics of Accumulation Landslides Supported by Arbor Species 期刊论文  OAI收割
FORESTS, 2022, 卷号: 13, 期号: 10, 页码: 16
作者:  Jiang, Tong;  Li, Longfei;  Xue, Lei;  Huang, Kun;  Zhao, Jindi
  |  收藏  |  浏览/下载：32/0  |  提交时间：2023/03/31
An Experimental Study on the Dynamic Evolution Characteristics of Soil Arching and the Rational Spacing of Anti-Slide Piles 期刊论文  OAI收割
SUSTAINABILITY, 2022, 卷号: 14, 期号: 14, 页码: 15
作者:  Zhong, Wei;  Zhang, Shuai;  He, Na
  |  收藏  |  浏览/下载：27/0  |  提交时间：2022/09/30
香炉山隧洞龙蟠-乔后断裂带西支蠕滑特性与位错模式 期刊论文  OAI收割
长江科学院院报, 2022, 卷号: 39, 期号: 12, 页码: 97
作者:  周辉;  赵海涛;  李坚;  赵成伟;  刘文博
  |  收藏  |  浏览/下载：2/0  |  提交时间：2025/06/27
Displacement characteristic of landslides reinforced with flexible piles: field and physical model test 期刊论文  OAI收割
JOURNAL OF MOUNTAIN SCIENCE, 2020, 卷号: 17, 期号: 4, 页码: 787-800
作者:  Zhou Chang;  Hu Xin-li;  Zheng Wen-bo;  Xu Chu;  Wang Qiang
  |  收藏  |  浏览/下载：24/0  |  提交时间：2020/11/12
Impact characteristics of gustiness debris flow on check dam 会议论文  OAI收割
Beijing, August 19, 2019 - August 22, 2019
作者:  Jiang X.G.;  Liu F.W.;  Hu K.H.;  Liu T.;  Wang H.J.
  |  收藏  |  浏览/下载：48/0  |  提交时间：2019/12/30
The influence of sea water corrosion on the resistance cracking performance of carbon steel 会议论文  OAI收割
Beijing, China, June 16, 2013 - June 21, 2013
作者:  Wang LM;  Han DP;  Zhang DH;  Li DY;  Geng H
  |  收藏  |  浏览/下载：32/0  |  提交时间：2018/11/08
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：34/0  |  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.  
Double-parameter threshold and its formation mechanism of the colluvial landslide: Xintan landslide, China 期刊论文  OAI收割
ENVIRONMENTAL GEOLOGY, 2006, 卷号: 49, 期号: 5, 页码: 696-707
作者:  He, KQ;  Wang, SJ
  |  收藏  |  浏览/下载：20/0  |  提交时间：2018/09/26
Displacement estimation by the phase-shiftings of fourier transform in present white noise (EI CONFERENCE) 会议论文  OAI收割
ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China
作者:  Wu Y.-H.
收藏  |  浏览/下载：33/0  |  提交时间：2013/03/25
Displacement estimation is a fundamental problem in Real-time video image processing. It can be typically approached by theories based on features in spatial domain. This paper presents an algorithm which improves the theory for estimating the moving object's displacement in spatial domain by its Fourier transform frequency spectrum. Because of the characters of Fourier transform  the result is based on all the features in the image. Utilizing shift theorem of Fourier transform and auto-registration  the algorithm employs the phase spectrum difference in polar coordinate of two frame images sequence with the moving target1  2. The method needn't transform frequency spectrum to spatial domain after calculation comparing with the traditional algorithm which has to search Direc peak  and it reduces processing time. Since the technique proposed uses all the image information  including all the white noise in the image especially  and it's hard to overcome the aliasing from noises  but the technique can be an effective way to analyze the result in little white noise by the different characters between high and low frequency bands. It can give the displacement of moving target within 1 pixel of accuracy. Experimental evidence of this performance is presented  and the mathematical reasons behind these characteristics are explained in depth. It is proved that the algorithm is fast and simple and can be used in image tracking and video image processing.  
Constituents and features of displacement vector angle of colluvial landslide 期刊论文  OAI收割
ENVIRONMENTAL GEOLOGY, 2003, 卷号: 45, 期号: 2, 页码: 279-285
作者:  He, KQ;  Wang, SJ
  |  收藏  |  浏览/下载：25/0  |  提交时间：2018/09/26