同相轴完整程度对混沌振子检测效果的影响
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摘要
针对地震勘探资料含加性强随机噪声,已提出用混沌振子系统检测同相轴的方法。就同相轴完整程度对系统检测效果影响进行研究表明,对于含有不同个数Ricker子波的同相轴,个数越多,同相轴可检测的速度分布带越大,越接近准确速度,系统检测SNR越好;对于不同截断长度的同相轴,可检测的最佳SNR均出现在准确速度上;同相轴长度一定的情况下,扫描速度相同时,同相轴起始道序号越小,检测SNR越好。
It has been put up to detect the event using the chaotic oscillator detection system for the seismic prospecting data with additive noise.The influence of the level of integrity of the event on detection effects of system is studied.It is shown that for the events of different numbers of Ricker wavelets,the larger the number is,the wider the velocity range in which the event could be detected,the closer to the right velocity,the better the detection SNR of the system is.For the truncated events of different lengths,the best detection SNR comes out at the right velocity.In the condition that the length of the event and the scan velocities are fixed,the smaller the serial number of the start channel of the event is,the better the detection SNR is.
It has been put up to detect the event using the chaotic oscillator detection system for the seismic prospecting data with additive noise.The influence of the level of integrity of the event on detection effects of system is studied.It is shown that for the events of different numbers of Ricker wavelets,the larger the number is,the wider the velocity range in which the event could be detected,the closer to the right velocity,the better the detection SNR of the system is.For the truncated events of different lengths,the best detection SNR comes out at the right velocity.In the condition that the length of the event and the scan velocities are fixed,the smaller the serial number of the start channel of the event is,the better the detection SNR is.
引文
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[3]LI Yue,YANG Bao-jun.Chaotic system for the detectionof periodic signals under the background of strong noise[J].Chinese Science Bulletin,2003,48(5):508-510.
[4]LI Yue,YANG Bao-jun.Physical mechanism of the chao-tic detection of the unknown frequency of weak harmonicsignal and effects of damping ratio on the detection results[J].Chinese Physics,2004,13(9):1386-1390.
[5]ZHANG Zhong-jie.The processing and interpretationmethod for the anisotropic media using multi-componentseismic data[M].Harbin:Heilongjiang Education Press,2002:15-35.
[6]李月,杨宝俊,邓小英,等.谐波信号频率的混沌检测方法[J].电子与信息学报,2005,27(5):731-733.LI Yue,YANG BAO-jun,DENG Xiao-yinge,t al.Detect-ing of harmonic frequency using chaos[J].Transactionon Electronics and Information,2005,27(5):731-733.
[7]Sheriff R E.Encyclopedic dictionary of exploration geo-physics[M].Tulsa:Society of Exploration Geophysi-cists,1994:254-255.
[8]WANG G Y,CHEN D J,LIN J Y.The application ofchaotic oscillators to weak signal detection[J].IEEETransactions on Industrial Electronics,1999,46(2):440-444.
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