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二代小波及在重力位场分离中的应用

发表时间:2009-05-15  浏览量:1342  下载量:627
全部作者: 吴小羊,刘天佑,尹正武,陈高
作者单位: 中国地质大学地球物理与空间信息学院;中国石化勘探南方分公司
摘 要: 第一代小波变换的算法基于傅里叶变换,要求被处理的数据必须等间距,并且存在边界振荡现象。第二代小波变换基于提升算法,是一种比Mallat算法更为有效的算法。介绍第二代小波变换的基本理论和特点,它包括分裂(split)、预测(predict)、更新(update)3个步骤,并根据大巴山及前缘地区1∶20万重力资料,研究采用二代小波多尺度分解对本区的重力异常进行位场分离,反演前寒武褶皱基底面。功率谱分析表明:5阶细节反映本区前寒武褶皱基底,ChK-ShP-WF北一带是前寒武基底凹陷的中心区。
关 键 词: 勘探地球物理学;二代小波;提升算法;褶皱基底;重力场
Title: The second generation wavelet and its application in the gravity field separation
Author: WU Xiaoyang, LIU Tianyou, YIN Zhengwu, CHEN Gao
Organization: Institute of Geophysics and Geomatics, China University of Geosciences;Southern Exploration Branch of SINOPEC
Abstract: The algorithm of the first generation wavelet is based on Fourier transform. It requires equally spaced data and has boundary oscillation. The second generation wavelet transform is based on the lifting scheme which is more efficient than the Mallat algorithm. This paper introduces the basic theory and characteristics of the second generation wavelet. It consists of split, predict and update. Based on the 1∶200 000 gravity data of Dabashan, the second-generation wavelet multi-scale decomposition was employed to separate the gravity anomalies field and invert the depth of the Precambrian fold basement. The power spectral analysis result showed that fifth-order wavelet detail denoted Precambrian fold basement and Chengkou-Shiping-north of Wenfeng was the center of the fold basement depression.
Key words: exploration geophysics; the second generation wavelet; the lifting scheme; fold basement; gravity field
发表期数: 2009年5月第9期
引用格式: 吴小羊,刘天佑,尹正武,等. 二代小波及在重力位场分离中的应用[J]. 中国科技论文在线精品论文,2009,2(9):970-974.
 
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