重力异常小波多分辨分析分解阶次的确定

刁博; 王家林; 程顺有

Volume 32 Issue 4

Jul. 2007

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DIAO Bo, WANG Jia-lin, CHENG Shun-you, 2007. The Confirmation of Decomposition Level in Wavelet Multi-Resolution Analysis for Gravity Anomalies. Earth Science, 32(4): 564-568.

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DIAO Bo, WANG Jia-lin, CHENG Shun-you, 2007. The Confirmation of Decomposition Level in Wavelet Multi-Resolution Analysis for Gravity Anomalies. Earth Science, 32(4): 564-568.

DIAO Bo, WANG Jia-lin, CHENG Shun-you, 2007. The Confirmation of Decomposition Level in Wavelet Multi-Resolution Analysis for Gravity Anomalies. Earth Science, 32(4): 564-568.

Citation:

DIAO Bo, WANG Jia-lin, CHENG Shun-you, 2007. The Confirmation of Decomposition Level in Wavelet Multi-Resolution Analysis for Gravity Anomalies. Earth Science, 32(4): 564-568.

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The Confirmation of Decomposition Level in Wavelet Multi-Resolution Analysis for Gravity Anomalies

1.
Key Laboratory of Marine Geology of the Minsitry of Education, Tongji University, Shanghai 200092, China
2.
Key Laboratory of Continental Dynamics of the Minsitry of Education, North west University, Xi′an 710069, China

Received Date: 2006-12-31
Publish Date: 2007-07-25

Abstract

Abstract

How to confirm the decomposition level is a basic issue in wavelet multi-resolution analysis for gravity anomalies. In this paper, the relations between the decomposition level and the length of signal, and the relations between the decomposition level and the support width of mother wavelets are discussed. Based on the comparison between the result of wavelet multi-resolution analysis for Bouger gravity anomalies in Tarim basin and Tianshan orogenic belt and the fearures of corresponding geoid anomaly, the authors proposed a method for confirming the decomposition level. Using bior3.5 wavelet, the 5th level detail can avoid the interference of wavelet generating functions and thereby its result accords with the features of corresponding geoid anomaly. However, there are many differences between the 6th and its corresponding geoid anomaly. Therefore, in terms of signal processing and geophysics theory, the proper decomposition level is 5, and any higher-level decomposition is unreasonable. All these researches have contributed a lot to confirming the decomposition level in processing gravity anomalies by providing effective and feasible methods.
- wavelet multi-resolution analysis,
- wavelet decomposition level,
- geoid anomaly,
- Tarim basin

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References(19)

References

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