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正Electrical and electromagnetic method Wang et al.present an anomalous principal component decomposition method based on the Stratton-Chu integral.The airwaves and sea layers can be separated from the anomalous field,eliminating the airwave effect.The method is implemented in integral transform form,making it a robust processing method,is particularly effective for removing the effect of the entire sea layer.     

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HUANGFU Gang （皇甫岗） Professor of Earthquake Administration of Yunnan Province. Ph D student of School of Earth and Space Sciences, University of Science and Technology of China. Obtained his MS Degree from Institute of Geology, China Earthquake Administration in 1988. Mainly engaged in researches on seismology, seismogeology and rock mechanics. Member of Committee of Science and Technology, China Earthquake Administration.     

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SHANG Xue-feng （尚学峰） Ph D Candidate of Department of Earth and Atmosphere Sciences in Massachusetts Institute of Technology. Graduated from School of Earth and Space Sciences in geophysics in 2004 and obtained his MS Degree from School of Earth and Space Sciences in geophysics in 2007. Now mainly engaged in researches on seismic wave theory and source failure dynamics.     

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ZENG Rong-sheng (曾融生) Professor of Institute of Geophysics, China Earthquake Administration (CEA), Academician of Chinese Academy of Sciences. Graduated from Department of mathematics, Amoy University in 1946. Mainly engaged in researches on solid geophysics and earth dynamics. Members of Chinese Geophysical Society and member of Seismological Society of China.