The Characteristics of Information Dimension  

作　　者：安镇文 姚栋华 陈颙 

机构地区：[1]Institute of Geophysics, State Seismological Bureau, Beijing 100081, PRC [2]State Seismological Bureau, Beijing 100036, PRC

出　　处：《Science China Chemistry》1993年第7期863-871,共9页中国科学（化学英文版）

基　　金：This project is supported by the Chinese Joint Seismological Science Foundation. No. 92A0053, Institute of Geophysics, State Seismological Bureau, Beijing, China.

摘　　要：Based on the information theory and multifractals viewpoint, the information dimension D_1 of acoustic emission (AE) of rock for marble, gabbro and sandstone in a laboratory condition and seismic activities before and after some large earthquakes are studied. The results show that there is a dimension reduction process before the failure of rock and before the occurrence of large earthquakes. The curves of D_1 determined during the process have a wider non-scaling range. Moreover, the non-scaling range became narrow when rock was close to failure fracture and large earthquake was just to happen. This shows that the system has instable critical behavior.Based on the information theory and multifractals viewpoint, the information dimension D₁ of acoustic emission （AE） of rock for marble, gabbro and sandstone in a laboratory condition and seismic activities before and after some large earthquakes are studied. The results show that there is a dimension reduction process before the failure of rock and before the occurrence of large earthquakes. The curves of D₁ determined during the process have a wider non-scaling range. Moreover, the non-scaling range became narrow when rock was close to failure fracture and large earthquake was just to happen. This shows that the system has instable critical behavior.

关 键 词：ACOUSTIC emission(AE) SEISMIC activity SCALING information DIMENSION CRITICAL behavior. 

分 类 号：O6[理学—化学]