| Hilbert时频谱在大地电磁数据处理中的应用 |
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| 引用本文： | 蔡剑华,胡惟文. Hilbert时频谱在大地电磁数据处理中的应用[J]. 石油地球物理勘探, 2011, 0(6): 984-988,1012,836 |
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| 作者姓名： | 蔡剑华 胡惟文 |
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| 作者单位： | 湖南文理学院信息研究所; |
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| 基金项目： | 湖南文理学院博士启动项目; 湖南省“十一五”重点建设学科—光学基金; 湖南文理学院优秀青年项目; 常德市科技局计划项目联合资助 |
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| 摘 要： | 文中研究了大地电磁信号的Hilbert时频谱特征,并将其用于大地电磁信号的噪声识别、数据筛选和分段平稳分析中。通过内蒙古毛登区实测大地电磁数据处理,验证了方法的有效性。结果表明Hilbert时频谱可准确地描述大地电磁数据的突变点、持续时段和频带能量分布,为大地电磁信号的噪声识别、数据筛选和分段平稳处理提供了条件;利用Hilbert时频谱可挑选出信噪比高、能量强且分布均匀的信号段,并可做进一步的参数估计,提高了资料处理质量。
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| 关 键 词： | 大地电磁数据 Hilbert时频谱 噪声识别 数据筛选 分段平稳 |
Application of Hilbert time-frequency spectrum in magnetotelluric data processing |
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| Cai Jian-hua , Hu Wei-wen..Information Institute,Hunan University of Arts , Science,Changde,Hunan ,China. Application of Hilbert time-frequency spectrum in magnetotelluric data processing[J]. Oil Geophysical Prospecting, 2011, 0(6): 984-988,1012,836 |
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| Authors: | Cai Jian-hua Hu Wei-wen..Information Institute Hunan University of Arts Science Changde Hunan China |
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| Affiliation: | Cai Jian-hua1 and Hu Wei-wen1.1.Information Institute,Hunan University of Arts and Science,Changde,Hunan 415000,China |
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| Abstract: | Characteristics of Hilbert time-frequency spectrum for magnetotelluric data are discussed in this paper.Using these characteristics,noise identification,data selection and piece-wise stationary approaches are developed for MT data processing.Field magnetotelluric data from Maodeng area,Inner Mongolia are analyzed to verify the validity of the method.The results show that Hilbert time-frequency spectrum can accurately describe point mutations and continuous segment and frequency energy distribution of magnet... |
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| Keywords: | magnetotelluric data Hilbert time-frequency spectrum signal to noise ratio data selection piece-wise stationary |
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