-
公开(公告)号：EP0666992B1
公开(公告)日：1999-08-25
申请号：EP94923411.6
申请日：1994-07-13
CPC分类号： G01V1/3808 , G01P3/42 , G01V1/364 , G01V2210/56
摘要： A method for reducing the effects of reverberation on noisy seismic wavefields recorded from within a moisture-laden environment. The wavefield manifests itself as a pressure signature and a velocity signature that contains an embedded noise signature. The pressure signature is adaptively filtered and subtractively combined with the velocity signature to isolate a nearly pure noise signature. The nearly pure noise signature is added back to the original velocity signature with opposite sign to clear away the embedded noise, leaving a refined velocity signature. The refined velocity signature iteratively is scaled and summed with the pressure signature, incrementing the scale factor at each iteration and autocorrelating the sum. A coefficient of convergence is calculated after each summation. The coefficient of convergence that most closely approaches unity identifies the preferred scale factor.
-
公开(公告)号：EP0666992A1
公开(公告)日：1995-08-16
申请号：EP94923411.0
申请日：1994-07-13
CPC分类号： G01V1/3808 , G01P3/42 , G01V1/364 , G01V2210/56
摘要： A method for reducing the effects of reverberation on noisy seismic wavefields recorded from within a moisture-laden environment. The wavefield manifests itself as a pressure signature and a velocity signature that contains an embedded noise signature. The pressure signature is adaptively filtered and subtractively combined with the velocity signature to isolate a nearly pure noise signature. The nearly pure noise signature is added back to the original velocity signature with opposite sign to clear away the embedded noise, leaving a refined velocity signature. The refined velocity signature iteratively is scaled and summed with the pressure signature, incrementing the scale factor at each iteration and autocorrelating the sum. A coefficient of convergence is calculated after each summation. The coefficient of convergence that most closely approaches unity identifies the preferred scale factor.
-
搜索结果
2 条记录 (耗时 0.009 秒)
