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	Nonlinear interactions between gravity waves and background winds 期刊论文 iSwitch采集 Progress in natural science-materials international, 2007, 卷号: 17, 期号: 6, 页码: 639-644 作者: Liu, Xiao; Xu, Jiyao 收藏 \| 浏览/下载：35/0 \| 提交时间：2019/05/10 Gravity waves Background winds Vertical group velocity Vertical wavelength Nonlinear interactions
	Detecting of multi-target in sea or sky background based on wavelet energy (EI CONFERENCE) 会议论文 OAI收割 Advanced Sensor Systems and Applications II, November 8, 2004 - November 12, 2004, Beijing, China 作者: Liu G. 收藏 \| 浏览/下载：17/0 \| 提交时间：2013/03/25 The technology of multi-target tracking is always detecting small targets in complex background. According to the frequency characteristic of nature background and small target a method of detecting targets based on wavelet energy is suggested. The energy of targets in horizontal and vertical direction outclass that of background or we can say the gray degree of targets outclass that of background. Then through selecting adaptive region-value targets and background can be divided. By the method of classifying the figure centers of every target can be calculated. According to the figure centers of every target in several neighboring frames the position and velocity of every target in next frame can be estimated by Kalman filter. Experiment results have shown that small targets in sea or sky nature background can be detected by this method and they can be tracking.
	Full waveform inversion with optimal basis functions 期刊论文 OAI收割 PHYSICAL REVIEW LETTERS, 2003, 卷号: 90, 期号: 10 Sun, G; Chang, QS; Sheng, P 收藏 \| 浏览/下载：32/0 \| 提交时间：2013/09/17 SEISMIC-REFLECTION DATA HIGHLY DISCONTINUOUS MEDIUM EQUATION TRAVEL-TIME FORM INVERSION BACKGROUND VELOCITY ELASTIC INVERSION OPTIMIZATION PROPAGATION SEISMOGRAMS ALGORITHMS