本文以Web of Science核心合集为文献源,分别以1960年1月1日至2017年12月31日、 1968年1月1日至2017年12月31日、 2008年1月1日至2018年9月1日三个时间段的科学文献为分析对象,借助CiteSpace软件,讨论了地震预测预报研究的发展进程,以1...本文以Web of Science核心合集为文献源,分别以1960年1月1日至2017年12月31日、 1968年1月1日至2017年12月31日、 2008年1月1日至2018年9月1日三个时间段的科学文献为分析对象,借助CiteSpace软件,讨论了地震预测预报研究的发展进程,以10年为单位的研究议程的演变,以及汶川地震以来地震预测预报研究的主要领域,试图对地震预测预报研究以及相关领域发展战略研究提供一定的参考。结果显示,地震预测预报相关科技进程一直处在动态的发展中,在重大事件的推动下,每一个时间段中呈现不同的且趋向于多样化的发展趋势,同时愈来愈向着多种方法并重的更加深入和精细的阶段发展。展开更多
In the estimation of seismic tendency, using Gutenberg-Richter's b-value and using Hurst exponent are two commonly used methods. Based on the fractal geometry of earthquake time series, we point out that these two...In the estimation of seismic tendency, using Gutenberg-Richter's b-value and using Hurst exponent are two commonly used methods. Based on the fractal geometry of earthquake time series, we point out that these two methods correlate to each other. In the perspective of fractional Brownian motion (FBM), an earthquake sequence with b>3/4 and that with b less than or equal 3/4 have different dynamic properties.展开更多
The frequency-size distribution of model earthquakes in a one-dimensional Burridge-Knopoff spring-block model[Phys.Rev.Lett,22(1989)2632]is studied.Analytical approach is taken to avoid the limitations on the size of ...The frequency-size distribution of model earthquakes in a one-dimensional Burridge-Knopoff spring-block model[Phys.Rev.Lett,22(1989)2632]is studied.Analytical approach is taken to avoid the limitations on the size of models and computation time in numerical calculations.By using the Hamiltonian of the spring-block system a concept of‘seismic phonon’is proposed which is similar to the concept of phonon in solid state physics.The result of the occurrence frequency of model earthquakes shows a distribution similar to the modified gamma distribution proposed by Main and Burton using information theory.展开更多
文摘本文以Web of Science核心合集为文献源,分别以1960年1月1日至2017年12月31日、 1968年1月1日至2017年12月31日、 2008年1月1日至2018年9月1日三个时间段的科学文献为分析对象,借助CiteSpace软件,讨论了地震预测预报研究的发展进程,以10年为单位的研究议程的演变,以及汶川地震以来地震预测预报研究的主要领域,试图对地震预测预报研究以及相关领域发展战略研究提供一定的参考。结果显示,地震预测预报相关科技进程一直处在动态的发展中,在重大事件的推动下,每一个时间段中呈现不同的且趋向于多样化的发展趋势,同时愈来愈向着多种方法并重的更加深入和精细的阶段发展。
文摘In the estimation of seismic tendency, using Gutenberg-Richter's b-value and using Hurst exponent are two commonly used methods. Based on the fractal geometry of earthquake time series, we point out that these two methods correlate to each other. In the perspective of fractional Brownian motion (FBM), an earthquake sequence with b>3/4 and that with b less than or equal 3/4 have different dynamic properties.
基金Supported by the National Natural Science Foundation of China under Grant No.49725410。
文摘The frequency-size distribution of model earthquakes in a one-dimensional Burridge-Knopoff spring-block model[Phys.Rev.Lett,22(1989)2632]is studied.Analytical approach is taken to avoid the limitations on the size of models and computation time in numerical calculations.By using the Hamiltonian of the spring-block system a concept of‘seismic phonon’is proposed which is similar to the concept of phonon in solid state physics.The result of the occurrence frequency of model earthquakes shows a distribution similar to the modified gamma distribution proposed by Main and Burton using information theory.
