分形反射序列的合成记录与生物遗传法反演的初步研究

SYNTHETIC SEISMOGRAMS CONSISTING OF FRACTAL REELECTION SEQUENCE AND SEISMIC INVERSION USING GENETIC ALGORITHMS

长春地质学院,长春130026

Changchun Geuloyy College, Changchun 130026

分形理论和生物遗传法反演都是近一、二年才被我国地学界注意的两种非线性理论,目前仍处于研究探索阶段。本文首先研究了具有分形规律的反射系数(与f~(α/2)成正比,其中f为频率,α为接近于1的实数)的合成记录,然后探讨了生物遗传法反演。在微机上的计算表明,分形理论和生物遗传法反演的结合是解决地震学复杂问题的有效工具,因而值得进一步开发其潜力。

Both the fractal theory and the genetic seismic inversion are non-linear theoories which have been brought to our geophysists and geologists' attention for only a few years and thus remain to be further explored. This paper will begin with a study on synthetic seismograms consisting of reflection coefficients that are subordinated to the fractal regularity (i.e. the coefficients are supposed to be in proportion to f0/8 .where f = frequency and a is a real number close to 1).and then proceed to probe into the seismic inversion using genetic algorithms. The calculating results show that the fractal theory incorporating with genetic seismic inversion has potentialities in tackling complex seismic problems,it is thus worthy to be further explorated.