【摘要】 本文用一种模式识别方法——拟合优度法研究了大华北地区地震活动的分期。结果表明,拟合优度法与Fisher方法一样,能定量地划分地震活动期;但用后者需采用树状分类器,前者则能一次给出最后的分类结果,而且拟合优度法还可以根据迭代次数来确定合理的分类数。此外,文中对研究区未来时间段是否属于地震高潮期,也给出了判定的方法与结果。更多还原

【Abstract】 The dividing of seismic active period in north China is researched with the one of the pattern recognition methods-fitting optimum seeking method in this paper. The results show that the method can divide the seismic active period quantitatively as Fisher’s the latter used the tree classifier and the former gave the final results once. Moreover the former can determine more reasonable classification according to the iterative number. The method and results determining if interval belongs to the seismic active period next time are given too.更多还原