永胜台定点形变与丽江7.0级地震  

ESTABLISHMENT OF ATTENUATION LAW OF ACCELERATION PEAK VALUE BY USING NEURAL NETWORK

作　　者：刘仲全[1] 

机构地区：[1]云南省地震局

出　　处：《地震研究》1997年第3期273-277,共5页Journal of Seismological Research

摘　　要：丽江７０级地震前，永胜台定点形变出现前所未有的巨大变化，且东西向的变化较南北向的变化更显著。展示了在源区附近７级大震前定点形变突出变化的一个典型震例。此震例对于今后研究观测点附近大震前的异常特征有重要的参考意义。This paper,after supporsing the form of attenuation law of acceleration peak value,uses pratical observation data of acceleration peak value fitted by artificaial neural network to obtain the coefficient undetermined in equation.In order to accelerate training of neural network,the network training method with division of objective stage in view of back propagation learning algorithm is designed in the paper.On the basis of the observation data of horizontal acceleration peak value for the Lancang-Genma strong earthquake and in combination with some strong earthquake data in west America, the attenuation law of horizontal acceleration peak value with the characteristics of mountain areas in Yunnan is fitted and established using the artificial neural network.

关 键 词：异常现象 定点变形 地震 震级 地震前兆 

分 类 号：P315.7[天文地球—地震学]