机构

• 地理科学与资源研究所 [2]
• 地质与地球物理研究所 [2]
• 长春光学精密机械与物... [1]

采集方式

• OAI收割 [5]

内容类型

• 期刊论文 [3]
• SCI/SSCI论文 [1]
• 会议论文 [1]

发表日期

• 2010 [2]
• 2006 [1]
• 2005 [2]

学科主题

• Geoscience... [1]
• Multidisci... [1]

筛选

浏览/检索结果: 共5条，第1-5条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Lie algebra integral algorithm of travel-time calculation for pre-stack Kirchhoff depth migration 期刊论文  OAI收割 CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2010, 卷号: 53, 期号: 8, 页码: 1893-1901 作者:  Zhang Lian-Ping;  Liu Hong   |  收藏  |  浏览/下载：18/0  |  提交时间：2018/09/26 Coordinate Transform  Lie Algebra Integral  Exponential Mapping  Seismic Travel Time  Lateral Velocity Variation   Lie algebra integral algorithm of travel-time calculation for pre-stack Kirchhoff depth migration 期刊论文  OAI收割 CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION, 2010, 卷号: 53, 期号: 8, 页码: 1893-1901 作者:  Zhang Lian-Ping;  Liu Hong   |  收藏  |  浏览/下载：13/0  |  提交时间：2018/09/26 Coordinate Transform  Lie Algebra Integral  Exponential Mapping  Seismic Travel Time  Lateral Velocity Variation   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：29/0  |  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.   Correcting method of eddy covariance fluxes over non-flat surfaces and its application in ChinaFLUX 期刊论文  OAI收割 SCIENCE IN CHINA SERIES D-EARTH SCIENCES, 2005, 卷号: 48, 期号: Suppl. 1, 页码: 42-50 作者:  Zhu, ZL;  Sun, XM(孙晓敏);  Yuan, GF 收藏  |  浏览/下载：249/66  |  提交时间：2011/06/10 eddy covariance fluxes  unhomogeneous surfaces  coordinate transform  correction  ChinaFLUX   Correcting method of eddy covariance fluxes over non-flat surfaces and its application in ChinaFLUX SCI/SSCI论文  OAI收割 2005 Zhu Z. L.; Sun X. M.; Zhou Y. L.; Xu J. P.; Yuan G. F.; Zhang R. H. 收藏  |  浏览/下载：26/0  |  提交时间：2012/06/08 eddy covariance fluxes  unhomogeneous surfaces  coordinate transform  correction  ChinaFLUX  water-vapor  carbon-dioxide  long-term  forest  exchange  energy  co2  balance