瞬时频谱分析及其在地震趋势估计中的应用
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摘要: 首先简述了瞬时频谱分析理论,并用3个信号的瞬时频谱计算结果与其 Fourier 谱的比较,说明了瞬时谱的优越性.最后,将瞬时频谱分析用于华北地区几个地震带的地震趋势估计的研究中.结果表明,用地震序列的瞬时谱分析,不仅对未来大震的发生时间,而且对大地震的震级,都能给出较好的估计.
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[2] Bartels, B. G. F. and Parks, T. W.,1986. The time varying filtering and signal estimation, using Wigner distribulion synthesis techniques. IEEE Trans.,ASSP——34, 442——451.
[3] Classen. T. A. C. M .and Mecklenbrauker, W. F. G.,1980. The Wigner distribution——a tool for time——frequency signal analysis. Philips J. Res.,35, 217——250.
[4] Jane, C. P. and Kaizer, A. J. M.,1983. Time——frequency distribution of loudspeekers: the application of Wigner distribution. J. Audio Eng. Snc.,31, 198——222.
[5] Martin, M——1984. Measuring the degree of nonstationary by using Wigner——Ville spectrum. ICASSP——84, 3, 41 B,1——4.
[6] Wigner. E——1932. On the quantum correction for thermodynamic equilibrium. Phys. Rev——40. 749——759.
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