| 基于小波分析的海洋重力异常畸变消除方法研究 |
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| 引用本文： | 赵池航,高成发,周百令.基于小波分析的海洋重力异常畸变消除方法研究[J].测绘科学,2006,31(5):34-36. |
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| 作者姓名： | 赵池航 高成发 周百令 |
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| 作者单位： | 东南大学交通学院,南京,210096;东南大学仪科系,南京,210096 |
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| 基金项目： | 东南大学校科研和教改项目 |
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| 摘 要： | 为了有效地消除重力异常畸变对海洋重力测量的影响,得到高精度的海洋重力测量值,本文在小波理论分析的基础上,将小波分析应用到消除海洋重力异常畸变中。基于信号的奇异性分析理论和小波软阈值处理方法,提出一种小波联合软阈值处理方法;根据重力异常状态方程,分别采用小波软阈值处理方法和小波联合软阈值处理方法对重力异常畸变数据进行了仿真对比实验,理论分析和仿真实验表明:采用小波软阈值处理方法和小波联合软阈值处理方法并选用通用阈值选择规则都能在一定程度上消除海洋重力异常畸变,但在相同背景条件下,小波联合软阈值处理方法的性能优于小波软阈值处理方法。
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| 关 键 词： | 小波分析 重力异常 联合软阈值 |
| 文章编号： | 1009-2307(2006)05-0034-03 |
| 收稿时间： | 2005-09-01 |
| 修稿时间： | 2005年9月1日 |
Research on the elimination of gravitational abnormal deform based on wavelet analysis |
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| ZHAO Chi-hang,GAI Cheng-fa,ZHOU Bai-ling.Research on the elimination of gravitational abnormal deform based on wavelet analysis[J].Science of Surveying and Mapping,2006,31(5):34-36. |
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| Authors: | ZHAO Chi-hang GAI Cheng-fa ZHOU Bai-ling |
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| Abstract: | In order to eliminate the effect of gravitational abnormal deform to marine gravimetric survey,and improve the precision of marine gravimetric survey,the theory of wavelet is analyzed and applied to process the gravitational abnormal data.Based on the theory of signal singularity,the method of united soft threshold is brought forward in the paper.The Bumps curve disturbed by white noise is adopted to simulate the gravitational abnormal data,the method of soft threshold and the method of united soft threshold are adopted to process the gravitational abnormal.Theoretical analysis and emulation experiments indicate that both methods are effective for alleviating gravitational abnormal value,but the performance of the method of united soft threshold excels the method of soft threshold. |
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| Keywords: | wavelet analysis gravitational abnormal united soft threshold |
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