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实际地球介质中的波的新研究进展—四川地震学、非线性地震学与构造活动波研
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作者 冯德益 《世界地震译丛》 北大核心 1990年第1期1-8,共8页
本文介绍实际地球介质(地球物理介质、地质介质)中的波的激发与传播问题的某些新的研究方向与进展。首先简要说明实际地球介质的一般特性。其次分别介绍随时间变化的三维非均匀地球介质中的地震波和非线性地球介质中的地震波的传播问... 本文介绍实际地球介质(地球物理介质、地质介质)中的波的激发与传播问题的某些新的研究方向与进展。首先简要说明实际地球介质的一般特性。其次分别介绍随时间变化的三维非均匀地球介质中的地震波和非线性地球介质中的地震波的传播问题,也就是四维地震学和非线性地震学的研究进展。本文最后研究了三种类型(广义瑞利型、广义勒夫型和广义导波型)的构造活动波的激发与传播特性,并用它们来解释过去已发现的几种不同类型的地震活动波。 展开更多
关键词 实际地球介质 四维地震学 非线性地震学 地震 构造活动波 传播特性
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Reducing of Seismic Vulnerability & Short-Time Earthquake Prediction: Methods and Instruments of Nonlinear Seismology
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作者 Oleg Borisovich Khavroshkin Vladislav Vladimirovich Tsyplakov 《Journal of Mathematics and System Science》 2012年第1期36-44,共9页
Elimination of human losses is the main and immediate task in the seismic vulnerability problem.The authors suggest the ways of development of seismic research and discussion of defense problems for reducing of seismi... Elimination of human losses is the main and immediate task in the seismic vulnerability problem.The authors suggest the ways of development of seismic research and discussion of defense problems for reducing of seismic vulnerability. It is the ways of nonlinear seismology region. Unconditionally seism zoning and the theory of catastrophes allow reduce human losses and building destruction. But well-known isoseists are the private case of caustic catastrophe theory or seismo-acoustics, so seism zoning can be amounted to 6 elementary catastrophe forms. It will better help to predict seismic actions. The short-time local prediction of seismic events is general method for strong reducing of human losses. This method takes into account chaotic properties of stress fields and waves and the peculiarities of urban area. It bases on the natural seismo-emission phenomenon and is realized by long-time monitoring, which gives statistically and geographically continuous picture (chart) of seismic noise level inside geologic media. The instruments of this strategy are shock and pressure-proofed seismometers for long-time monitoring and control the state of geological media including underwater shelf areas. The authors think that the active protecting for cities and buildings as the best modem form of people safety consists in stress discharge of geologic media. Ultrasonic wave defense includes and bases on strong interaction between powerful waves from earthquake and ultrasonic wave train. The authors want to point out that the technical objects may be used lbr the investigation of earthquakes induced and some reasons of seismic vulnerability. Also reducing of seismic vulnerability contains as component kinetic acting on volcano at the pre-explosive stage. The interesting and important aspect of defense problem is observation of the inharmonic wave processes in the soil and quasi-constant forces as the nearest seismic analogue of radiation forces in nonlinear acoustics under powerful earthquake seismic tremor. 展开更多
关键词 Seismic-acoustic emission nonlinear acoustics earthquake prediction chaos deformed waves private user
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