神经网络方法在爆炸地震震中定位方面的应用
详细信息 本馆镜像全文    |  推荐本文 | | 获取馆网全文
摘要
地震定位过程中,由于地球介质的不均一性以及台站局部地质条件的复杂性,使震中距和地震波走时呈非线性关系。利用通常地震定位方法所确定的爆炸地震震中位置和实际震中存在20~30km偏差。人工神经网络具有高度非线性映射功能,可应用于地震震中定位。应用BP(反向传播)神经网络确定远场爆破地震震中的实例表明,所确定的震中位置和实际震中位置偏差在8km以内,外延预测确定的震中位置和实际震中位置偏差小于18km。
The algorithm principle of BP neural networks is briefly introduced in the paper, at the same time, the formation of networks and the study skills are provided. Because of the earth medium non homogeneity and complicity of geological conditions of seismic stations, the relationship between epicenter distance and seismic wave propagation time is not linear.It has been found that epicenters located by usual seismic location method deviate from real epicenters. The deviation of distance is about 20km to 30km. The neural networks can be sucessfully applied to the epicneter locating as they have a high non linear reflective function. The errors between epicenters calculated by neural networks and actual epicenters are less than 8km and 18km respectively in and out of the seismic network control area.
引文
李东升,王炜,黄冰书.1995.人工神经网络及其在地震预报中的应用.地震,15(4):379~383.刘启元,李顺成.1997.中国数字地震台网的接收函数及非线性反演.地球物理学报,40(3):356~366.石成钢,刘西拉.1991.人工神经网络在震害预测中的应用.地震工程与工程振动,11(2):39~47.沈清,胡得文.1993.神经网络应用技术.南京:国防科技大学出版社.邵学钟,张家茹,范会吉,等.1996.天山造山带地壳结构与构造.地球物理学报,39(3):336~345.王炜,吴耿锋,李东升,等.1997.BP神经网络在新一代地震预报专家系统中的应用.地震,17(2):142~148.StevenRT.1996.Analysisofhigh-frequencyPg/LgrationfromNTSexplosionsandwesternUSearthquakes.BulSeismSocAm,86:1042~1053.

版权所有:© 2023 中国地质图书馆 中国地质调查局地学文献中心