【摘要】 HHT分析方法对于非平稳信号的处理是一种新的而优越的方法,它具有高度的自适应性和科学高效性,分解出来的IMF分量能够反映信号的本质特征,而且所分析得出的Hilbert能量谱可清楚的表明能量随时频分布的特点。首先通过仿真信号验证HHT分析方法的准确性、高效性和合理性,而后再利用HHT分析方法对于2007年Notohanto地震的主震的部分数据进行处理,从数据分析的结果中探究地震的内在特点和规律,从而为减少地震发生后的经济损失作出贡献。更多还原

【Abstract】 The new analytical method HHT is especially suitable for processing on non-stationary signal.Based on its adaptability,science and efficiency,the IMF components which are decomposed from non-stationary signals by the method reflect substitutive characteristics of signals and Hilbert.energy spectrum describing the characteristics of energy along with time-frequency distribution is proposed.Firstly,using analog signals proves the accuracy,efficiency,and rationality of the method.Then partial data from the main earthquake happened in Notohanto 2007 is analyzed by using HHT analytical method.Therefore,the exploration of inner rules and features of earthquakes can be conducted based on the result of data analysis,which will make a contribution to the reduction of economic losses after earthquakes.更多还原