| GENERALIZED CONJUGATE-GRADIENT ALGORITHM AND ITS APPLICATIONS TO SEISMIC TRACE INVERSION |
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| 作者姓名： | Zhou Zhusheng He Jishan and Zhao Heqing Geophysical Institute Central South University of Technology Changsha P. R. China |
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| 作者单位： | Zhou Zhusheng，He Jishan and Zhao Heqing Geophysical Institute Central South University of Technology，Changsha 410083，P. R. China |
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| 摘 要： | １ＩＮＴＲＯＤＵＣＴＩＯＮＣｕｒｅｎｔｌｙ，ｓｅｉｓｍｉｃｔｒａｃｅｉｎｖｅｒｓｉｏｎｈａｓａｌｒｅａｄｙｂｅｅｎａｎｉｍｐｏｒｔａｎｔｗｏｒｋｉｎｓｅｉｓｍｉｃｄａｔａｐｒｏｃｅｓｓｉｎｇｆｏｒｍｅｔｉｃｕｌｏｕｓｏｉｌｇａｓｅｘｐｌｏｒａｔｉ...
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GENERALIZED CONJUGATE-GRADIENT ALGORITHM AND ITS APPLICATIONS TO SEISMIC TRACE INVERSION |
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| Zhou Zhusheng,He Jishan and Zhao Heqing Geophysical Institute Central South University of Technology,Changsha ,P. R. China.GENERALIZED CONJUGATE-GRADIENT ALGORITHM AND ITS APPLICATIONS TO SEISMIC TRACE INVERSION[J].Transactions of Nonferrous Metals Society of China,1999,9(1). |
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| Authors: | Zhou Zhusheng He Jishan Zhao Heqing |
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| Abstract: | A novel generalized conjugate gradient algorithm for complicated equations of seismic trace inverse problems, which is based on classical conjugate gradient algorithm, has been put forward so as to improve the stability of seismic trace inversion, and to reduce inversion computation and memory resources needed. The algorithm brings high accuracy, fast operation speed and good ability of resisting ill condition. In addition, by analysing sensitivity matrix according to the specific problem of seismic trace inversion, a new recursive algorithm which needs no sensitivity matrix is developed to save memory greatly. Furthermore, in the new algorithm, sensitivity matrix operation can be converted into convolution and correlation operations to make the whole recursion to be implemented completely by vector operation, which thus speeds recursion operation greatly. |
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| Keywords: | seismic trace inversion conjugate gradient algorithm accuracy stability operation speed |
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