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从混沌振子系统对处于强随机噪声背景中的准周期或周期信号具有灵敏的大尺度周期相态响应出发,利用仿真实验探讨共炮点地震资料弱有效地震信号检测时混沌振子系统的检测能力.研究发现,用于检测的混沌振子系统呈现大尺度周期相态与地震勘探同相轴经水平动校正后的准周期波列信号组成、噪声强弱、畸变程度有关;对于同类同相轴,畸变程度越大,混沌振子系统检测SNR越低,对于同样的畸变程度,截断扫描波速越接近准确值,检测SNR越高;间接使混沌振子系统呈现大尺度周期相态的截断扫描波速存在一个不对称带;在使系统进入大尺度周期相态条件下,同相轴子波畸变系数比可有较大的变化范围.
Based on the sensitive large-scale periodic phase response of quasi-periodic or periodic signals in the chaotic oscillator system with strong random noise background, the chaotic oscillator system is used to investigate the detection ability of the chaotic oscillator system when detecting weak and effective seismic signals of common shot point seismic data using simulation experiments. It is found that the chaotic oscillator system used for detection shows that the large-scale periodic phase is related to the composition of quasi-periodic wave train signals after horizontal motion correction of seismic exploration, the degree of noise and the degree of distortion. For the same-phase events, the degree of distortion For the same degree of distortion, the closer the truncated scan wave speed is to the exact value, the higher the detection SNR is. The asymmetric band exists in the truncated scan wave velocity which indirectly leads to chaos oscillator system in large-scale periodic phase. Under the condition of large-scale periodic phase state, the coefficient ratio of wavelet distortion in the phase axis can have a larger range of variation.